TY  - JOUR
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Milovanović, Gradimir V.
AU  - Krstajić, Predrag
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4826
AB  - In order to improve the interpretation of measurement results and to achieve the optimal performance of microfluidic biosensors, advanced mathematical models of their time response and noise are needed. The random nature of adsorption–desorption and mass transfer (MT) processes that generate the sensor response makes the sensor output signal inherently stochastic and necessi-tates the use of a stochastic approach in sensor response analysis. We present a stochastic model of the sensor time response, which takes into account the coupling of adsorption–desorption and MT processes. It is used for the analysis of response kinetics and ultimate noise performance of protein biosensors. We show that slow MT not only decelerates the response kinetics, but also increases the noise and decreases the sensor’s maximal achievable signal‐to‐noise ratio, thus degrading the ultimate sensor performance, including the minimal detectable/quantifiable analyte concentration. The results illustrate the significance of the presented model for the correct interpretation of measurement data, for the estimation of sensors’ noise performance metrics important for reliable analyte detection/quantification, as well as for sensor optimization in terms of the lower detection/quanti-fication limit. They are also incentives for the further investigation of the MT influence in nanoscale sensors, as a possible cause of false‐negative results in analyte detection experiments.
PB  - MDPI
T2  - Biosensors
T1  - Stochastic time response and ultimate noise performance of adsorption‐based microfluidic biosensors
VL  - 11
IS  - 6
SP  - 194
DO  - 10.3390/bios11060194
ER  - 

@article{
author = "Jokić, Ivana and Đurić, Zoran G. and Radulović, Katarina and Frantlović, Miloš and Milovanović, Gradimir V. and Krstajić, Predrag",
year = "2021",
abstract = "In order to improve the interpretation of measurement results and to achieve the optimal performance of microfluidic biosensors, advanced mathematical models of their time response and noise are needed. The random nature of adsorption–desorption and mass transfer (MT) processes that generate the sensor response makes the sensor output signal inherently stochastic and necessi-tates the use of a stochastic approach in sensor response analysis. We present a stochastic model of the sensor time response, which takes into account the coupling of adsorption–desorption and MT processes. It is used for the analysis of response kinetics and ultimate noise performance of protein biosensors. We show that slow MT not only decelerates the response kinetics, but also increases the noise and decreases the sensor’s maximal achievable signal‐to‐noise ratio, thus degrading the ultimate sensor performance, including the minimal detectable/quantifiable analyte concentration. The results illustrate the significance of the presented model for the correct interpretation of measurement data, for the estimation of sensors’ noise performance metrics important for reliable analyte detection/quantification, as well as for sensor optimization in terms of the lower detection/quanti-fication limit. They are also incentives for the further investigation of the MT influence in nanoscale sensors, as a possible cause of false‐negative results in analyte detection experiments.",
publisher = "MDPI",
journal = "Biosensors",
title = "Stochastic time response and ultimate noise performance of adsorption‐based microfluidic biosensors",
volume = "11",
number = "6",
pages = "194",
doi = "10.3390/bios11060194"
}

Jokić, I., Đurić, Z. G., Radulović, K., Frantlović, M., Milovanović, G. V.,& Krstajić, P.. (2021). Stochastic time response and ultimate noise performance of adsorption‐based microfluidic biosensors. in Biosensors
MDPI., 11(6), 194.
https://doi.org/10.3390/bios11060194

Jokić I, Đurić ZG, Radulović K, Frantlović M, Milovanović GV, Krstajić P. Stochastic time response and ultimate noise performance of adsorption‐based microfluidic biosensors. in Biosensors. 2021;11(6):194.
doi:10.3390/bios11060194 .

Jokić, Ivana, Đurić, Zoran G., Radulović, Katarina, Frantlović, Miloš, Milovanović, Gradimir V., Krstajić, Predrag, "Stochastic time response and ultimate noise performance of adsorption‐based microfluidic biosensors" in Biosensors, 11, no. 6 (2021):194,
https://doi.org/10.3390/bios11060194 . .

TY  - JOUR
AU  - Tahir, Muhammad
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3974
AB  - The multilayer band structure of black phosphorus (BP) is highly anisotropic, and its bandgap is tunable by applying a perpendicular electric field Ez . Within a linear response theory, we study dc and ac transport in few-layer BP, as functions of the Fermi energy, temperature, or frequency,
in the presence of a Zeeman field. The current response to an in-plane electric field along two perpendicular directions is anisotropic and reflects that of the energy spectrum. In addition, we study the Hall conductivity and power absorption spectrum. The Hall
conductivity vanishes, but the power spectrum P(ω) shows a considerable structure as a function of the normalized frequency α/hω=2Δ and/or of the bandgap 2Δ tuned by Ez. In particular, a clear maximum occurs in the difference between spin-up and spin-down contributions
to P(ω). When potassium (K) atoms are deposited on top of BP, the anisotropy in the current response is stronger and the power spectrum is further modified. The results may be pertinent to the development of phosphorene-based applications.
PB  - American Institute of Physics (AIP Publishing)
T2  - Journal of Applied Physics
T1  - dc and ac transport in few-layer black phosphorus
VL  - 127
SP  - 044302
DO  - 10.1063/1.5129273
ER  - 

@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2020",
abstract = "The multilayer band structure of black phosphorus (BP) is highly anisotropic, and its bandgap is tunable by applying a perpendicular electric field Ez . Within a linear response theory, we study dc and ac transport in few-layer BP, as functions of the Fermi energy, temperature, or frequency,
in the presence of a Zeeman field. The current response to an in-plane electric field along two perpendicular directions is anisotropic and reflects that of the energy spectrum. In addition, we study the Hall conductivity and power absorption spectrum. The Hall
conductivity vanishes, but the power spectrum P(ω) shows a considerable structure as a function of the normalized frequency α/hω=2Δ and/or of the bandgap 2Δ tuned by Ez. In particular, a clear maximum occurs in the difference between spin-up and spin-down contributions
to P(ω). When potassium (K) atoms are deposited on top of BP, the anisotropy in the current response is stronger and the power spectrum is further modified. The results may be pertinent to the development of phosphorene-based applications.",
publisher = "American Institute of Physics (AIP Publishing)",
journal = "Journal of Applied Physics",
title = "dc and ac transport in few-layer black phosphorus",
volume = "127",
pages = "044302",
doi = "10.1063/1.5129273"
}

Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2020). dc and ac transport in few-layer black phosphorus. in Journal of Applied Physics
American Institute of Physics (AIP Publishing)., 127, 044302.
https://doi.org/10.1063/1.5129273

Tahir M, Krstajić P, Vasilopoulos P. dc and ac transport in few-layer black phosphorus. in Journal of Applied Physics. 2020;127:044302.
doi:10.1063/1.5129273 .

Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "dc and ac transport in few-layer black phosphorus" in Journal of Applied Physics, 127 (2020):044302,
https://doi.org/10.1063/1.5129273 . .

TY  - CONF
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Krstajić, Predrag
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3256
AB  - Real-time in situ operation of bio/chemical sensors assumes detection of chemical substances or biological specimens in samples of complex composition. Since sensor selectivity cannot be ideal, adsorption of particles other than target particles inevitably occur on the sensing surface. That affects the sensor response and its intrinsic fluctuations which are caused by stochastic fluctuations of the numbers of adsorbed particles of all the adsorbing substances. In microfluidic sensors, such response fluctuations are a result of coupled adsorption, desorption and mass transfer (convection and diffusion) processes of analyte particles. Analysis of these fluctuations is important because they constitute the adsorption-desorption noise, which limits the sensing performance. In this work we perform the analysis of fluctuations by using a stochastic model of sensor response after the steady state is reached, in the case of two-analyte adsorption, considering mass transfer processes. The results enable estimation of the ultimate sensing performance of adsorption-based microfluidic bio/chemical sensors of different sensing areas, operating in bianalyte mixture environments.
PB  - Institute of Electrical and Electronics Engineers (IEEE)
C3  - 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings
T1  - Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures
SP  - 161
EP  - 164
DO  - 10.1109/MIEL.2019.8889579
ER  - 

@conference{
author = "Jokić, Ivana and Đurić, Zoran G. and Radulović, Katarina and Frantlović, Miloš and Krstajić, Predrag",
year = "2019",
abstract = "Real-time in situ operation of bio/chemical sensors assumes detection of chemical substances or biological specimens in samples of complex composition. Since sensor selectivity cannot be ideal, adsorption of particles other than target particles inevitably occur on the sensing surface. That affects the sensor response and its intrinsic fluctuations which are caused by stochastic fluctuations of the numbers of adsorbed particles of all the adsorbing substances. In microfluidic sensors, such response fluctuations are a result of coupled adsorption, desorption and mass transfer (convection and diffusion) processes of analyte particles. Analysis of these fluctuations is important because they constitute the adsorption-desorption noise, which limits the sensing performance. In this work we perform the analysis of fluctuations by using a stochastic model of sensor response after the steady state is reached, in the case of two-analyte adsorption, considering mass transfer processes. The results enable estimation of the ultimate sensing performance of adsorption-based microfluidic bio/chemical sensors of different sensing areas, operating in bianalyte mixture environments.",
publisher = "Institute of Electrical and Electronics Engineers (IEEE)",
journal = "2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings",
title = "Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures",
pages = "161-164",
doi = "10.1109/MIEL.2019.8889579"
}

Jokić, I., Đurić, Z. G., Radulović, K., Frantlović, M.,& Krstajić, P.. (2019). Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures. in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings
Institute of Electrical and Electronics Engineers (IEEE)., 161-164.
https://doi.org/10.1109/MIEL.2019.8889579

Jokić I, Đurić ZG, Radulović K, Frantlović M, Krstajić P. Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures. in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings. 2019;:161-164.
doi:10.1109/MIEL.2019.8889579 .

Jokić, Ivana, Đurić, Zoran G., Radulović, Katarina, Frantlović, Miloš, Krstajić, Predrag, "Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures" in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings (2019):161-164,
https://doi.org/10.1109/MIEL.2019.8889579 . .

TY  - CONF
AU  - Jokić, Ivana
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Đurić, Zoran G.
AU  - Cvetanović Zobenica, Katarina
AU  - Krstajić, Predrag
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6961
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3326
AB  - Detection limits in microfluidic chemical and biological sensors, which determine the range of analyte concentrations reliably detectable by the sensor, are important sensor parameters. The lower limit of detection, defined as the lowest concentration that can be distinguished from noise, has its minimum determined by the fundamental adsorption-desorption (AD) noise, inevitable in adsorption-based devices. In this work, we analyze this fundamental detection limit, particularly considering the influence of mass transfer processes in microfluidic devices. For that purpose, we derive the expression for the sensor’s signal-to-noise ratio (SNR), which takes into account the AD noise, and then the equation for the minimal analyte concentration at which the SNR has a sufficiently high value for reliable analyte detection. Subsequently, we analyze the mass transfer influence on the sensor’s maximal achievable signal-to-noise ratio and on the fundamental detection limit. The results of the analysis show a significant mass transfer influence on these important sensor performance metrics. They also provide guidelines for achieving the sensor’s best possible detection performance through the optimization of the sensor design and operating conditions.
PB  - Belgrade : ETRAN
PB  - Belgrade :Academic Mind
C3  - Proceedings of Papers – 6th International Conference on Electrical, Electronic and Computing Engineering, IcETRAN 2019, Silver Lake, Serbia, June 03 – 06, 2019 / Zbornik radova - 63. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 03 – 06. juna, 2019. godine
T1  - Analysis of the Fundamental Detection Limit in Microfluidic Chemical and Biological Sensors
SP  - 571
EP  - 574
UR  - https://hdl.handle.net/21.15107/rcub_dais_6961
ER  - 

@conference{
author = "Jokić, Ivana and Radulović, Katarina and Frantlović, Miloš and Đurić, Zoran G. and Cvetanović Zobenica, Katarina and Krstajić, Predrag",
year = "2019",
abstract = "Detection limits in microfluidic chemical and biological sensors, which determine the range of analyte concentrations reliably detectable by the sensor, are important sensor parameters. The lower limit of detection, defined as the lowest concentration that can be distinguished from noise, has its minimum determined by the fundamental adsorption-desorption (AD) noise, inevitable in adsorption-based devices. In this work, we analyze this fundamental detection limit, particularly considering the influence of mass transfer processes in microfluidic devices. For that purpose, we derive the expression for the sensor’s signal-to-noise ratio (SNR), which takes into account the AD noise, and then the equation for the minimal analyte concentration at which the SNR has a sufficiently high value for reliable analyte detection. Subsequently, we analyze the mass transfer influence on the sensor’s maximal achievable signal-to-noise ratio and on the fundamental detection limit. The results of the analysis show a significant mass transfer influence on these important sensor performance metrics. They also provide guidelines for achieving the sensor’s best possible detection performance through the optimization of the sensor design and operating conditions.",
publisher = "Belgrade : ETRAN, Belgrade :Academic Mind",
journal = "Proceedings of Papers – 6th International Conference on Electrical, Electronic and Computing Engineering, IcETRAN 2019, Silver Lake, Serbia, June 03 – 06, 2019 / Zbornik radova - 63. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 03 – 06. juna, 2019. godine",
title = "Analysis of the Fundamental Detection Limit in Microfluidic Chemical and Biological Sensors",
pages = "571-574",
url = "https://hdl.handle.net/21.15107/rcub_dais_6961"
}

Jokić, I., Radulović, K., Frantlović, M., Đurić, Z. G., Cvetanović Zobenica, K.,& Krstajić, P.. (2019). Analysis of the Fundamental Detection Limit in Microfluidic Chemical and Biological Sensors. in Proceedings of Papers – 6th International Conference on Electrical, Electronic and Computing Engineering, IcETRAN 2019, Silver Lake, Serbia, June 03 – 06, 2019 / Zbornik radova - 63. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 03 – 06. juna, 2019. godine
Belgrade : ETRAN., 571-574.
https://hdl.handle.net/21.15107/rcub_dais_6961

Jokić I, Radulović K, Frantlović M, Đurić ZG, Cvetanović Zobenica K, Krstajić P. Analysis of the Fundamental Detection Limit in Microfluidic Chemical and Biological Sensors. in Proceedings of Papers – 6th International Conference on Electrical, Electronic and Computing Engineering, IcETRAN 2019, Silver Lake, Serbia, June 03 – 06, 2019 / Zbornik radova - 63. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 03 – 06. juna, 2019. godine. 2019;:571-574.
https://hdl.handle.net/21.15107/rcub_dais_6961 .

Jokić, Ivana, Radulović, Katarina, Frantlović, Miloš, Đurić, Zoran G., Cvetanović Zobenica, Katarina, Krstajić, Predrag, "Analysis of the Fundamental Detection Limit in Microfluidic Chemical and Biological Sensors" in Proceedings of Papers – 6th International Conference on Electrical, Electronic and Computing Engineering, IcETRAN 2019, Silver Lake, Serbia, June 03 – 06, 2019 / Zbornik radova - 63. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 03 – 06. juna, 2019. godine (2019):571-574,
https://hdl.handle.net/21.15107/rcub_dais_6961 .

TY  - CONF
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Krstajić, Predrag
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4866
AB  - Real-time in situ operation of bio/chemical sensors assumes detection of chemical substances or biological specimens in samples of complex composition. Since sensor selectivity cannot be ideal, adsorption of particles other than target particles inevitably occur on the sensing surface. That affects the sensor response and its intrinsic fluctuations which are caused by stochastic fluctuations of the numbers of adsorbed particles of all the adsorbing substances. In microfluidic sensors, such response fluctuations are a result of coupled adsorption, desorption and mass transfer (convection and diffusion) processes of analyte particles. Analysis of these fluctuations is important because they constitute the adsorption-desorption noise, which limits the sensing performance. In this work we perform the analysis of fluctuations by using a stochastic model of sensor response after the steady state is reached, in the case of two-analyte adsorption, considering mass transfer processes. The results enable estimation of the ultimate sensing performance of adsorption-based microfluidic bio/chemical sensors of different sensing areas, operating in bianalyte mixture environments.
PB  - Institute of Electrical and Electronics Engineers (IEEE)
C3  - 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings
T1  - Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures
SP  - 161
EP  - 164
DO  - 10.1109/MIEL.2019.8889579
ER  - 

@conference{
author = "Jokić, Ivana and Đurić, Zoran G. and Radulović, Katarina and Frantlović, Miloš and Krstajić, Predrag",
year = "2019",
abstract = "Real-time in situ operation of bio/chemical sensors assumes detection of chemical substances or biological specimens in samples of complex composition. Since sensor selectivity cannot be ideal, adsorption of particles other than target particles inevitably occur on the sensing surface. That affects the sensor response and its intrinsic fluctuations which are caused by stochastic fluctuations of the numbers of adsorbed particles of all the adsorbing substances. In microfluidic sensors, such response fluctuations are a result of coupled adsorption, desorption and mass transfer (convection and diffusion) processes of analyte particles. Analysis of these fluctuations is important because they constitute the adsorption-desorption noise, which limits the sensing performance. In this work we perform the analysis of fluctuations by using a stochastic model of sensor response after the steady state is reached, in the case of two-analyte adsorption, considering mass transfer processes. The results enable estimation of the ultimate sensing performance of adsorption-based microfluidic bio/chemical sensors of different sensing areas, operating in bianalyte mixture environments.",
publisher = "Institute of Electrical and Electronics Engineers (IEEE)",
journal = "2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings",
title = "Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures",
pages = "161-164",
doi = "10.1109/MIEL.2019.8889579"
}

Jokić, I., Đurić, Z. G., Radulović, K., Frantlović, M.,& Krstajić, P.. (2019). Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures. in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings
Institute of Electrical and Electronics Engineers (IEEE)., 161-164.
https://doi.org/10.1109/MIEL.2019.8889579

Jokić I, Đurić ZG, Radulović K, Frantlović M, Krstajić P. Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures. in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings. 2019;:161-164.
doi:10.1109/MIEL.2019.8889579 .

Jokić, Ivana, Đurić, Zoran G., Radulović, Katarina, Frantlović, Miloš, Krstajić, Predrag, "Analysis of Intrinsic Stochastic Fluctuations of the Time Response of Adsorption-Based Microfluidic Bio/Chemical Sensors: the Case of Bianalyte Mixtures" in 2019 IEEE 31st International Conference on Microelectronics, MIEL 2019 - Proceedings (2019):161-164,
https://doi.org/10.1109/MIEL.2019.8889579 . .

TY  - JOUR
AU  - Tahir, Muhammad
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2418
AB  - We investigate quantum transport in a bilayer WSe2 in the presence of an external potential V and interlayer coupling. The dc and ac conductivities are evaluated in the framework of linear response theory. As functions of the Fermi energy, the dc ones exhibit a nonmonotonic behavior with a flat region in the band gap. A deep local minimum is visible in spin-Hall conductivity near the top of the valence band as a consequence of a large valence band splitting. On the other hand, the ac spin- and valley-Hall conductivities, as functions of the frequency, show two opposite peaks near the top of the valence band. The spin-Hall conductivity exhibits a minimum value at V = 0 whereas the valley-Hall conductivity decreases monotonically upon varying V from negative to positive values. Furthermore, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom. The results are pertinent to the development of electrically controlled spintronic and valleytronic devices based on bilayer WSe2 and other group VI semiconductors.
PB  - American Physical Society (APS)
T2  - Physical Review B
T1  - Electrically controlled dc and ac transport in bilayer WSe2
VL  - 98
IS  - 7
SP  - 075429
DO  - 10.1103/PhysRevB.98.075429
ER  - 

@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2018",
abstract = "We investigate quantum transport in a bilayer WSe2 in the presence of an external potential V and interlayer coupling. The dc and ac conductivities are evaluated in the framework of linear response theory. As functions of the Fermi energy, the dc ones exhibit a nonmonotonic behavior with a flat region in the band gap. A deep local minimum is visible in spin-Hall conductivity near the top of the valence band as a consequence of a large valence band splitting. On the other hand, the ac spin- and valley-Hall conductivities, as functions of the frequency, show two opposite peaks near the top of the valence band. The spin-Hall conductivity exhibits a minimum value at V = 0 whereas the valley-Hall conductivity decreases monotonically upon varying V from negative to positive values. Furthermore, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom. The results are pertinent to the development of electrically controlled spintronic and valleytronic devices based on bilayer WSe2 and other group VI semiconductors.",
publisher = "American Physical Society (APS)",
journal = "Physical Review B",
title = "Electrically controlled dc and ac transport in bilayer WSe2",
volume = "98",
number = "7",
pages = "075429",
doi = "10.1103/PhysRevB.98.075429"
}

Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2018). Electrically controlled dc and ac transport in bilayer WSe2. in Physical Review B
American Physical Society (APS)., 98(7), 075429.
https://doi.org/10.1103/PhysRevB.98.075429

Tahir M, Krstajić P, Vasilopoulos P. Electrically controlled dc and ac transport in bilayer WSe2. in Physical Review B. 2018;98(7):075429.
doi:10.1103/PhysRevB.98.075429 .

Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "Electrically controlled dc and ac transport in bilayer WSe2" in Physical Review B, 98, no. 7 (2018):075429,
https://doi.org/10.1103/PhysRevB.98.075429 . .

TY  - CONF
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Krstajić, Predrag
AU  - Cvetanović Zobenica, Katarina
PY  - 2018
UR  - https://www.etran.rs/2018/IcETRAN/News/IcETRAN%20sumarni%20program%20sekcija_Ver.%204.3%20(1).pdf
UR  - http://dais.sanu.ac.rs/123456789/4630
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2859
AB  - In this paper we first give a short review of two stochastic models describing both the expected value and variance of the random number of adsorbed particles in microfluidic adsorption-based chemical and biological sensors. One model takes into account the influence of coupling of stochastic adsorptiondesorption processes and mass transfer on the change of the number of adsorbed particles, while the other neglects the influence of mass transfer. Subsequently, by using the two models, we perform the analysis of the expected value and variance, as well as the sensor's signal-to-noise ratio, after reaching the steady state of all transient processes. We compare the results obtained by using the different models, and determine conditions for their application. We estimate the influences of the sensing surface area and the concentration of target particles on statistical parameters of sensor response and signal-to-noise ratio, considering the cases where mass transfer is significant, and those where it is not. We particularly analyze the mass transfer influence on the expected value, variance and signal-to-noise ratio. Such analysis does not exist in the available literature. The presented analysis yields new knowledge about the stochastic response of adsorption-based sensors, and it is significant for their optimization in order to achieve reliable analyte detection and improved sensing performance.
PB  - ETRAN
C3  - IcETRAN & ETRAN 2018, Palić 11-14. 06. 2018: Program
T1  - Steady-state analysis of stochastic time response of chemical and biological microfluidic sensors
UR  - https://hdl.handle.net/21.15107/rcub_dais_4630
ER  - 

@conference{
author = "Jokić, Ivana and Đurić, Zoran G. and Radulović, Katarina and Frantlović, Miloš and Krstajić, Predrag and Cvetanović Zobenica, Katarina",
year = "2018",
abstract = "In this paper we first give a short review of two stochastic models describing both the expected value and variance of the random number of adsorbed particles in microfluidic adsorption-based chemical and biological sensors. One model takes into account the influence of coupling of stochastic adsorptiondesorption processes and mass transfer on the change of the number of adsorbed particles, while the other neglects the influence of mass transfer. Subsequently, by using the two models, we perform the analysis of the expected value and variance, as well as the sensor's signal-to-noise ratio, after reaching the steady state of all transient processes. We compare the results obtained by using the different models, and determine conditions for their application. We estimate the influences of the sensing surface area and the concentration of target particles on statistical parameters of sensor response and signal-to-noise ratio, considering the cases where mass transfer is significant, and those where it is not. We particularly analyze the mass transfer influence on the expected value, variance and signal-to-noise ratio. Such analysis does not exist in the available literature. The presented analysis yields new knowledge about the stochastic response of adsorption-based sensors, and it is significant for their optimization in order to achieve reliable analyte detection and improved sensing performance.",
publisher = "ETRAN",
journal = "IcETRAN & ETRAN 2018, Palić 11-14. 06. 2018: Program",
title = "Steady-state analysis of stochastic time response of chemical and biological microfluidic sensors",
url = "https://hdl.handle.net/21.15107/rcub_dais_4630"
}

Jokić, I., Đurić, Z. G., Radulović, K., Frantlović, M., Krstajić, P.,& Cvetanović Zobenica, K.. (2018). Steady-state analysis of stochastic time response of chemical and biological microfluidic sensors. in IcETRAN & ETRAN 2018, Palić 11-14. 06. 2018: Program
ETRAN..
https://hdl.handle.net/21.15107/rcub_dais_4630

Jokić I, Đurić ZG, Radulović K, Frantlović M, Krstajić P, Cvetanović Zobenica K. Steady-state analysis of stochastic time response of chemical and biological microfluidic sensors. in IcETRAN & ETRAN 2018, Palić 11-14. 06. 2018: Program. 2018;.
https://hdl.handle.net/21.15107/rcub_dais_4630 .

Jokić, Ivana, Đurić, Zoran G., Radulović, Katarina, Frantlović, Miloš, Krstajić, Predrag, Cvetanović Zobenica, Katarina, "Steady-state analysis of stochastic time response of chemical and biological microfluidic sensors" in IcETRAN & ETRAN 2018, Palić 11-14. 06. 2018: Program (2018),
https://hdl.handle.net/21.15107/rcub_dais_4630 .

TY  - CONF
AU  - Jokić, Ivana
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Đurić, Zoran
AU  - Krstajić, Predrag
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5709
AB  - We analyze the time response of MEMS/NEMS sensors of chemical and biological agents and its noise, by using two mathematical models. One of them is commonly used in the literature on MEMS/NEMS adsorption-based chemical and biological sensors, while the other one, which is more elaborate, and takes into account additional relevant physical processes, has been developed by us. We also investigate the limits of applicability of the two models as a function of the target substance concentration, especially having in mind the decrease of the minimal detectable concentration in the new sensor generation.
PB  - Belgrade : The Military Technical Institute
C3  - Proceedings - 8th International Scientific Conference of Defensive Technologies, OTEH 2018, 11-12.10.2018, Belgrade
T1  - MEMS/NEMS sensors of chemical and biological agents: applicability of different models for stedy-state analysis of sensor time response and noise
UR  - https://hdl.handle.net/21.15107/rcub_cer_5709
ER  - 

@conference{
author = "Jokić, Ivana and Radulović, Katarina and Frantlović, Miloš and Đurić, Zoran and Krstajić, Predrag",
year = "2018",
abstract = "We analyze the time response of MEMS/NEMS sensors of chemical and biological agents and its noise, by using two mathematical models. One of them is commonly used in the literature on MEMS/NEMS adsorption-based chemical and biological sensors, while the other one, which is more elaborate, and takes into account additional relevant physical processes, has been developed by us. We also investigate the limits of applicability of the two models as a function of the target substance concentration, especially having in mind the decrease of the minimal detectable concentration in the new sensor generation.",
publisher = "Belgrade : The Military Technical Institute",
journal = "Proceedings - 8th International Scientific Conference of Defensive Technologies, OTEH 2018, 11-12.10.2018, Belgrade",
title = "MEMS/NEMS sensors of chemical and biological agents: applicability of different models for stedy-state analysis of sensor time response and noise",
url = "https://hdl.handle.net/21.15107/rcub_cer_5709"
}

Jokić, I., Radulović, K., Frantlović, M., Đurić, Z.,& Krstajić, P.. (2018). MEMS/NEMS sensors of chemical and biological agents: applicability of different models for stedy-state analysis of sensor time response and noise. in Proceedings - 8th International Scientific Conference of Defensive Technologies, OTEH 2018, 11-12.10.2018, Belgrade
Belgrade : The Military Technical Institute..
https://hdl.handle.net/21.15107/rcub_cer_5709

Jokić I, Radulović K, Frantlović M, Đurić Z, Krstajić P. MEMS/NEMS sensors of chemical and biological agents: applicability of different models for stedy-state analysis of sensor time response and noise. in Proceedings - 8th International Scientific Conference of Defensive Technologies, OTEH 2018, 11-12.10.2018, Belgrade. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_5709 .

Jokić, Ivana, Radulović, Katarina, Frantlović, Miloš, Đurić, Zoran, Krstajić, Predrag, "MEMS/NEMS sensors of chemical and biological agents: applicability of different models for stedy-state analysis of sensor time response and noise" in Proceedings - 8th International Scientific Conference of Defensive Technologies, OTEH 2018, 11-12.10.2018, Belgrade (2018),
https://hdl.handle.net/21.15107/rcub_cer_5709 .

TY  - JOUR
AU  - Tahir, Muhammad
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2236
AB  - The recent experimental realization of high-quality WSe2 leads to the possibility of an efficient manipulation of its spin and valley degrees of freedom. Its electronic properties comprise a huge spin-orbit coupling, a direct band gap, and a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We evaluate its band structure and study ballistic electron transport through single and double junctions (or barriers) on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance versus the field Ms or Mv decreases in a fluctuating manner. For a single junction, the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 55%, and become perfect above U approximate to 45 meV while for a double junction this change can occur for U >= 50 meV and M >= 5 meV. In certain regions of the (M, U) plane P-v becomes perfect. The conductance g(c), its spin-up and spin-down components, and both polarizations oscillate with the barrier width d. The ability to isolate various carrier degrees of freedom in WSe2 may render it a promising candidate for new spintronic and valleytronic devices.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Magnetic and electric control of spin- and valley-polarized transport across tunnel junctions on monolayer WSe2
VL  - 95
IS  - 23
SP  - 235402
DO  - 10.1103/PhysRevB.95.235402
ER  - 

@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2017",
abstract = "The recent experimental realization of high-quality WSe2 leads to the possibility of an efficient manipulation of its spin and valley degrees of freedom. Its electronic properties comprise a huge spin-orbit coupling, a direct band gap, and a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We evaluate its band structure and study ballistic electron transport through single and double junctions (or barriers) on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance versus the field Ms or Mv decreases in a fluctuating manner. For a single junction, the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 55%, and become perfect above U approximate to 45 meV while for a double junction this change can occur for U >= 50 meV and M >= 5 meV. In certain regions of the (M, U) plane P-v becomes perfect. The conductance g(c), its spin-up and spin-down components, and both polarizations oscillate with the barrier width d. The ability to isolate various carrier degrees of freedom in WSe2 may render it a promising candidate for new spintronic and valleytronic devices.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Magnetic and electric control of spin- and valley-polarized transport across tunnel junctions on monolayer WSe2",
volume = "95",
number = "23",
pages = "235402",
doi = "10.1103/PhysRevB.95.235402"
}

Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2017). Magnetic and electric control of spin- and valley-polarized transport across tunnel junctions on monolayer WSe2. in Physical Review B
Amer Physical Soc, College Pk., 95(23), 235402.
https://doi.org/10.1103/PhysRevB.95.235402

Tahir M, Krstajić P, Vasilopoulos P. Magnetic and electric control of spin- and valley-polarized transport across tunnel junctions on monolayer WSe2. in Physical Review B. 2017;95(23):235402.
doi:10.1103/PhysRevB.95.235402 .

Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "Magnetic and electric control of spin- and valley-polarized transport across tunnel junctions on monolayer WSe2" in Physical Review B, 95, no. 23 (2017):235402,
https://doi.org/10.1103/PhysRevB.95.235402 . .

TY  - JOUR
AU  - Tahir, Muhammad
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2146
AB  - The electronic properties of WSe2 comprise a huge spin-orbit coupling, a wide direct band gap, and especially a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We study ballistic electron transport through single or double junctions on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance vs. the field M-s or M-v decreases in a fluctuating manner. For a single junction the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 70%, and become perfect above U approximate to 90meV while for a double junction this change can occur for U approximate to 50meV and M >= 10meV. Pv increases with U and both polarizations oscillate with the junction width. The results may render WSe2 a promising candidate for new spintronic and valleytronic devices.
PB  - Epl Association, European Physical Society, Mulhouse
T2  - Europhysics Letters
T1  - Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2
VL  - 118
IS  - 1
DO  - 10.1209/0295-5075/118/17001
ER  - 

@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2017",
abstract = "The electronic properties of WSe2 comprise a huge spin-orbit coupling, a wide direct band gap, and especially a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We study ballistic electron transport through single or double junctions on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance vs. the field M-s or M-v decreases in a fluctuating manner. For a single junction the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 70%, and become perfect above U approximate to 90meV while for a double junction this change can occur for U approximate to 50meV and M >= 10meV. Pv increases with U and both polarizations oscillate with the junction width. The results may render WSe2 a promising candidate for new spintronic and valleytronic devices.",
publisher = "Epl Association, European Physical Society, Mulhouse",
journal = "Europhysics Letters",
title = "Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2",
volume = "118",
number = "1",
doi = "10.1209/0295-5075/118/17001"
}

Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2017). Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2. in Europhysics Letters
Epl Association, European Physical Society, Mulhouse., 118(1).
https://doi.org/10.1209/0295-5075/118/17001

Tahir M, Krstajić P, Vasilopoulos P. Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2. in Europhysics Letters. 2017;118(1).
doi:10.1209/0295-5075/118/17001 .

Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2" in Europhysics Letters, 118, no. 1 (2017),
https://doi.org/10.1209/0295-5075/118/17001 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
AU  - Tahir, Muhammad
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1842
AB  - We investigate dc and ac transport in a monolayer of MoS2 in the presence of an effective mass asymmetry, a momentum-dependent term, and an out-of plane or in-plane Zeeman term. Analytical results are presented for both dc and ac conductivities in the framework of linear response theory. We show that the spin-Hall conductivity exhibits a strong dependence on the strength of the spin-orbit interaction while both spin-and valley-Hall conductivities show a very weak dependence on the temperature. The sum of the well separated spin-up and spin-down components of the diffusive dc longitudinal conductivity is linear in the electron concentration though the Fermi level is a nonmonotonic function of it. Further, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom as well as on the scattering which is essential at low frequencies.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Spin- and valley-polarized transport in a monolayer of MoS2
VL  - 94
IS  - 8
SP  - 085413
DO  - 10.1103/PhysRevB.94.085413
ER  - 

@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis and Tahir, Muhammad",
year = "2016",
abstract = "We investigate dc and ac transport in a monolayer of MoS2 in the presence of an effective mass asymmetry, a momentum-dependent term, and an out-of plane or in-plane Zeeman term. Analytical results are presented for both dc and ac conductivities in the framework of linear response theory. We show that the spin-Hall conductivity exhibits a strong dependence on the strength of the spin-orbit interaction while both spin-and valley-Hall conductivities show a very weak dependence on the temperature. The sum of the well separated spin-up and spin-down components of the diffusive dc longitudinal conductivity is linear in the electron concentration though the Fermi level is a nonmonotonic function of it. Further, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom as well as on the scattering which is essential at low frequencies.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Spin- and valley-polarized transport in a monolayer of MoS2",
volume = "94",
number = "8",
pages = "085413",
doi = "10.1103/PhysRevB.94.085413"
}

Krstajić, P., Vasilopoulos, P.,& Tahir, M.. (2016). Spin- and valley-polarized transport in a monolayer of MoS2. in Physical Review B
Amer Physical Soc, College Pk., 94(8), 085413.
https://doi.org/10.1103/PhysRevB.94.085413

Krstajić P, Vasilopoulos P, Tahir M. Spin- and valley-polarized transport in a monolayer of MoS2. in Physical Review B. 2016;94(8):085413.
doi:10.1103/PhysRevB.94.085413 .

Krstajić, Predrag, Vasilopoulos, Panagiotis, Tahir, Muhammad, "Spin- and valley-polarized transport in a monolayer of MoS2" in Physical Review B, 94, no. 8 (2016):085413,
https://doi.org/10.1103/PhysRevB.94.085413 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
AU  - Tahir, Muhammad
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1985
AB  - We study ballistic electron transport through single or double barriers on monolayer MoS2, of width d, in the presence of a ferromagnetic field Moran antiferromagnetic field F. The total conductance,gc, its spin-up and spin-down components, and the polarization oscillate with d or the distance b between two barriers. The corresponding oscillation periods are different. The conductance g(c) versus M decreases in a fluctuating manner with a steep decline at certain value of M. As a function of M the spin polarization P-s oscillates before it becomes 100% while the valley polarization 13, oscillates and steadily increases.
PB  - Elsevier
T2  - Physica E-Low-Dimensional Systems & Nanostructures
T1  - Spin- and valley-polarized transport through ferromagnetic and antiferromagnetic barriers on monolayer MoS2
VL  - 75
SP  - 317
EP  - 321
DO  - 10.1016/j.physe.2015.10.003
ER  - 

@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis and Tahir, Muhammad",
year = "2016",
abstract = "We study ballistic electron transport through single or double barriers on monolayer MoS2, of width d, in the presence of a ferromagnetic field Moran antiferromagnetic field F. The total conductance,gc, its spin-up and spin-down components, and the polarization oscillate with d or the distance b between two barriers. The corresponding oscillation periods are different. The conductance g(c) versus M decreases in a fluctuating manner with a steep decline at certain value of M. As a function of M the spin polarization P-s oscillates before it becomes 100% while the valley polarization 13, oscillates and steadily increases.",
publisher = "Elsevier",
journal = "Physica E-Low-Dimensional Systems & Nanostructures",
title = "Spin- and valley-polarized transport through ferromagnetic and antiferromagnetic barriers on monolayer MoS2",
volume = "75",
pages = "317-321",
doi = "10.1016/j.physe.2015.10.003"
}

Krstajić, P., Vasilopoulos, P.,& Tahir, M.. (2016). Spin- and valley-polarized transport through ferromagnetic and antiferromagnetic barriers on monolayer MoS2. in Physica E-Low-Dimensional Systems & Nanostructures
Elsevier., 75, 317-321.
https://doi.org/10.1016/j.physe.2015.10.003

Krstajić P, Vasilopoulos P, Tahir M. Spin- and valley-polarized transport through ferromagnetic and antiferromagnetic barriers on monolayer MoS2. in Physica E-Low-Dimensional Systems & Nanostructures. 2016;75:317-321.
doi:10.1016/j.physe.2015.10.003 .

Krstajić, Predrag, Vasilopoulos, Panagiotis, Tahir, Muhammad, "Spin- and valley-polarized transport through ferromagnetic and antiferromagnetic barriers on monolayer MoS2" in Physica E-Low-Dimensional Systems & Nanostructures, 75 (2016):317-321,
https://doi.org/10.1016/j.physe.2015.10.003 . .

TY  - JOUR
AU  - Jakšić, Zoran
AU  - Smiljanić, Milče
AU  - Vasiljević-Radović, Dana
AU  - Obradov, Marko
AU  - Radulović, Katarina
AU  - Tanasković, Dragan
AU  - Krstajić, Predrag
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1969
AB  - Aperture-based nanoplasmonics deals with an important class of structures with subwavelength hole arrays that support surface plasmons polaritons, thus ensuring control over propagation and localization of electromagnetic fields. The electromagnetic field localization in aperture-based plasmonic structures can be tailored by modifying the structure geometry at the deep subwavelength scale, in this way generating field hotspots in a controlled way. We defined subwavelength primitive objects and combined them in Boolean manner by applying logical operations like AND or OR to their shapes to generate complex forms and thus modify the subwavelength unit cell geometry. We designed our structures and simulated their scattering parameters by the finite element method and fabricated the experimental samples for the mid-wavelength infrared range using the conventional silicon-based planar technologies with gold and aluminum as plasmonic materials. We show that one can readily use the conventional, non-subwavelength photolithography to generate strong field nonlocalities without increasing the complexity of the system or requiring finer resolutions. The approach can be used for multispectral operation of plasmonic chemical or biological sensors.
PB  - Springer, Dordrecht
T2  - Optical and Quantum Electronics
T1  - Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale
VL  - 48
IS  - 4
DO  - 10.1007/s11082-016-0500-7
ER  - 

@article{
author = "Jakšić, Zoran and Smiljanić, Milče and Vasiljević-Radović, Dana and Obradov, Marko and Radulović, Katarina and Tanasković, Dragan and Krstajić, Predrag",
year = "2016",
abstract = "Aperture-based nanoplasmonics deals with an important class of structures with subwavelength hole arrays that support surface plasmons polaritons, thus ensuring control over propagation and localization of electromagnetic fields. The electromagnetic field localization in aperture-based plasmonic structures can be tailored by modifying the structure geometry at the deep subwavelength scale, in this way generating field hotspots in a controlled way. We defined subwavelength primitive objects and combined them in Boolean manner by applying logical operations like AND or OR to their shapes to generate complex forms and thus modify the subwavelength unit cell geometry. We designed our structures and simulated their scattering parameters by the finite element method and fabricated the experimental samples for the mid-wavelength infrared range using the conventional silicon-based planar technologies with gold and aluminum as plasmonic materials. We show that one can readily use the conventional, non-subwavelength photolithography to generate strong field nonlocalities without increasing the complexity of the system or requiring finer resolutions. The approach can be used for multispectral operation of plasmonic chemical or biological sensors.",
publisher = "Springer, Dordrecht",
journal = "Optical and Quantum Electronics",
title = "Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale",
volume = "48",
number = "4",
doi = "10.1007/s11082-016-0500-7"
}

Jakšić, Z., Smiljanić, M., Vasiljević-Radović, D., Obradov, M., Radulović, K., Tanasković, D.,& Krstajić, P.. (2016). Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale. in Optical and Quantum Electronics
Springer, Dordrecht., 48(4).
https://doi.org/10.1007/s11082-016-0500-7

Jakšić Z, Smiljanić M, Vasiljević-Radović D, Obradov M, Radulović K, Tanasković D, Krstajić P. Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale. in Optical and Quantum Electronics. 2016;48(4).
doi:10.1007/s11082-016-0500-7 .

Jakšić, Zoran, Smiljanić, Milče, Vasiljević-Radović, Dana, Obradov, Marko, Radulović, Katarina, Tanasković, Dragan, Krstajić, Predrag, "Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale" in Optical and Quantum Electronics, 48, no. 4 (2016),
https://doi.org/10.1007/s11082-016-0500-7 . .

TY  - CONF
AU  - Jakšić, Zoran
AU  - Smiljanić, Milče M.
AU  - Tanasković, Dragan
AU  - Obradov, Marko
AU  - Krstajić, Predrag
AU  - Jakšić, Olga
AU  - Vasiljević-Radović, Dana
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5796
AB  - Aperture-based nanoplasmonics deals with an important class of structures using surface 
plasmons polaritons at subwavelength hole arrays to control propagation and localization 
of electromagnetic fields [1]. Such structures include extraordinary optical transmission 
arrays [2], fishnet-based metamaterials [3] as well as different other metasurface with 
applicability in sensing and detection, waveguiding, etc. [4].
Sensing: plasmonics, fiber sensors, interferometers Contributed papers
171
The electromagnetic field localization in aperture-based plasmonic structures can be 
controled by modifying of the structure geometry at the deep subwavelength scale [5-6]. 
In this contribution we define subwavelength primitive objects that are combined in 
Boolean manner by applying logical operations like AND or OR to them to generate 
complex-shaped apertures and thus modify the subwavelength unit cell geometry.
Generally, any arbitrary shape may be presented as superposition of a number of 
primitive forms (corresponding to a series expansion).
The approach can be used to generate field hotspots in a controled manner and 
redistribute field within a unit cell. Boolean operations applied to aperture shapes not 
only ensure “fine tuning” of scattering characteristics, but also the redesign of spectral 
characteristics of nanohole-based metasurfaces, owing to control over field concentration 
and the appearance of strong field nonlocalities.
We designed our designer (spoof) plasmon structures [7] with deep subwavelength 
modifications, simulated their scattering parameters by the finite element method and 
fabricated the experimental samples for the mid-wavelength infrared range using the 
conventional silicon-based planar technologies with silver as plasmonic material. The 
shapes were obtained by overlapping (Boolean OR) square primitive objects.
We show that one can use a set of primitive shapes readily produced by the existing 
lithographic equipment to generate strong field nonlocalities without increasing the 
complexity of the system or requiring finer resolutions. Actually the simplest situation 
would be to simply shift the same photolithographic mask and repeat the already used 
pattern. Owing to the redistribution of spectral characteristics and their structural tuning, 
the present approach can be used for multispectral operation of plasmonic chemical or 
biological sensors.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - Book of Abstracts - V International School and Conference on Photonics, Photonica 2015, 24 August - 28 August 2015, Belgrade, Serbia
T1  - Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale
SP  - 170
EP  - 171
UR  - https://hdl.handle.net/21.15107/rcub_cer_5796
ER  - 

@conference{
author = "Jakšić, Zoran and Smiljanić, Milče M. and Tanasković, Dragan and Obradov, Marko and Krstajić, Predrag and Jakšić, Olga and Vasiljević-Radović, Dana",
year = "2015",
abstract = "Aperture-based nanoplasmonics deals with an important class of structures using surface 
plasmons polaritons at subwavelength hole arrays to control propagation and localization 
of electromagnetic fields [1]. Such structures include extraordinary optical transmission 
arrays [2], fishnet-based metamaterials [3] as well as different other metasurface with 
applicability in sensing and detection, waveguiding, etc. [4].
Sensing: plasmonics, fiber sensors, interferometers Contributed papers
171
The electromagnetic field localization in aperture-based plasmonic structures can be 
controled by modifying of the structure geometry at the deep subwavelength scale [5-6]. 
In this contribution we define subwavelength primitive objects that are combined in 
Boolean manner by applying logical operations like AND or OR to them to generate 
complex-shaped apertures and thus modify the subwavelength unit cell geometry.
Generally, any arbitrary shape may be presented as superposition of a number of 
primitive forms (corresponding to a series expansion).
The approach can be used to generate field hotspots in a controled manner and 
redistribute field within a unit cell. Boolean operations applied to aperture shapes not 
only ensure “fine tuning” of scattering characteristics, but also the redesign of spectral 
characteristics of nanohole-based metasurfaces, owing to control over field concentration 
and the appearance of strong field nonlocalities.
We designed our designer (spoof) plasmon structures [7] with deep subwavelength 
modifications, simulated their scattering parameters by the finite element method and 
fabricated the experimental samples for the mid-wavelength infrared range using the 
conventional silicon-based planar technologies with silver as plasmonic material. The 
shapes were obtained by overlapping (Boolean OR) square primitive objects.
We show that one can use a set of primitive shapes readily produced by the existing 
lithographic equipment to generate strong field nonlocalities without increasing the 
complexity of the system or requiring finer resolutions. Actually the simplest situation 
would be to simply shift the same photolithographic mask and repeat the already used 
pattern. Owing to the redistribution of spectral characteristics and their structural tuning, 
the present approach can be used for multispectral operation of plasmonic chemical or 
biological sensors.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "Book of Abstracts - V International School and Conference on Photonics, Photonica 2015, 24 August - 28 August 2015, Belgrade, Serbia",
title = "Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale",
pages = "170-171",
url = "https://hdl.handle.net/21.15107/rcub_cer_5796"
}

Jakšić, Z., Smiljanić, M. M., Tanasković, D., Obradov, M., Krstajić, P., Jakšić, O.,& Vasiljević-Radović, D.. (2015). Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale. in Book of Abstracts - V International School and Conference on Photonics, Photonica 2015, 24 August - 28 August 2015, Belgrade, Serbia
Belgrade : Vinča Institute of Nuclear Sciences., 170-171.
https://hdl.handle.net/21.15107/rcub_cer_5796

Jakšić Z, Smiljanić MM, Tanasković D, Obradov M, Krstajić P, Jakšić O, Vasiljević-Radović D. Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale. in Book of Abstracts - V International School and Conference on Photonics, Photonica 2015, 24 August - 28 August 2015, Belgrade, Serbia. 2015;:170-171.
https://hdl.handle.net/21.15107/rcub_cer_5796 .

Jakšić, Zoran, Smiljanić, Milče M., Tanasković, Dragan, Obradov, Marko, Krstajić, Predrag, Jakšić, Olga, Vasiljević-Radović, Dana, "Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale" in Book of Abstracts - V International School and Conference on Photonics, Photonica 2015, 24 August - 28 August 2015, Belgrade, Serbia (2015):170-171,
https://hdl.handle.net/21.15107/rcub_cer_5796 .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Van, Duppen B.
AU  - Peeters, F. M.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1269
AB  - The interaction between electrons and plasmons in trilayer graphene is investigated within the Overhauser approach resulting in the "plasmaron" quasiparticle. This interaction is cast into a field theoretical problem, and its effect on the energy spectrum is calculated using improved Wigner-Brillouin perturbation theory. The plasmaron spectrum is shifted with respect to the bare electron spectrum by Delta E(k) similar to 150-200 meV for ABC stacked trilayer graphene and for ABA trilayer graphene by Delta E(k) similar to 30-150 meV [Delta E(k) similar to 1-5 meV] for the hyperbolic (linear) part of the spectrum. The shift in general increases with the electron concentration ne and electron momentum. The dispersion of plasmarons is more pronounced in ABC stacked than in ABA stacked trilayer graphene, because of the different energy band structure and their different plasmon dispersion.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Plasmons and their interaction with electrons in trilayer graphene
VL  - 88
IS  - 19
SP  - 195423
DO  - 10.1103/PhysRevB.88.195423
ER  - 

@article{
author = "Krstajić, Predrag and Van, Duppen B. and Peeters, F. M.",
year = "2013",
abstract = "The interaction between electrons and plasmons in trilayer graphene is investigated within the Overhauser approach resulting in the "plasmaron" quasiparticle. This interaction is cast into a field theoretical problem, and its effect on the energy spectrum is calculated using improved Wigner-Brillouin perturbation theory. The plasmaron spectrum is shifted with respect to the bare electron spectrum by Delta E(k) similar to 150-200 meV for ABC stacked trilayer graphene and for ABA trilayer graphene by Delta E(k) similar to 30-150 meV [Delta E(k) similar to 1-5 meV] for the hyperbolic (linear) part of the spectrum. The shift in general increases with the electron concentration ne and electron momentum. The dispersion of plasmarons is more pronounced in ABC stacked than in ABA stacked trilayer graphene, because of the different energy band structure and their different plasmon dispersion.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Plasmons and their interaction with electrons in trilayer graphene",
volume = "88",
number = "19",
pages = "195423",
doi = "10.1103/PhysRevB.88.195423"
}

Krstajić, P., Van, D. B.,& Peeters, F. M.. (2013). Plasmons and their interaction with electrons in trilayer graphene. in Physical Review B
Amer Physical Soc, College Pk., 88(19), 195423.
https://doi.org/10.1103/PhysRevB.88.195423

Krstajić P, Van DB, Peeters FM. Plasmons and their interaction with electrons in trilayer graphene. in Physical Review B. 2013;88(19):195423.
doi:10.1103/PhysRevB.88.195423 .

Krstajić, Predrag, Van, Duppen B., Peeters, F. M., "Plasmons and their interaction with electrons in trilayer graphene" in Physical Review B, 88, no. 19 (2013):195423,
https://doi.org/10.1103/PhysRevB.88.195423 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Peeters, F. M.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1249
AB  - The relation between the energy and momentum of plasmarons in bilayer graphene is investigated within the Overhauser approach, where the electron-plasmon interaction is described as a field theoretical problem. We find that the Dirac-like spectrum is shifted by Delta E(k) similar to 100 divided by 150 meV depending on the electron concentration n(e) and electron momentum. The shift increases with electron concentration as the energy of plasmons becomes larger. The dispersion of plasmarons is more pronounced than in the case of single layer graphene, which is explained by the fact that the energy dispersion of electrons is quadratic and not linear. We expect that these predictions can be verified using angle-resolved photoemission spectroscopy (ARPES).
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Energy-momentum dispersion relation of plasmarons in bilayer graphene
VL  - 88
IS  - 16
SP  - 165420
DO  - 10.1103/PhysRevB.88.165420
ER  - 

@article{
author = "Krstajić, Predrag and Peeters, F. M.",
year = "2013",
abstract = "The relation between the energy and momentum of plasmarons in bilayer graphene is investigated within the Overhauser approach, where the electron-plasmon interaction is described as a field theoretical problem. We find that the Dirac-like spectrum is shifted by Delta E(k) similar to 100 divided by 150 meV depending on the electron concentration n(e) and electron momentum. The shift increases with electron concentration as the energy of plasmons becomes larger. The dispersion of plasmarons is more pronounced than in the case of single layer graphene, which is explained by the fact that the energy dispersion of electrons is quadratic and not linear. We expect that these predictions can be verified using angle-resolved photoemission spectroscopy (ARPES).",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Energy-momentum dispersion relation of plasmarons in bilayer graphene",
volume = "88",
number = "16",
pages = "165420",
doi = "10.1103/PhysRevB.88.165420"
}

Krstajić, P.,& Peeters, F. M.. (2013). Energy-momentum dispersion relation of plasmarons in bilayer graphene. in Physical Review B
Amer Physical Soc, College Pk., 88(16), 165420.
https://doi.org/10.1103/PhysRevB.88.165420

Krstajić P, Peeters FM. Energy-momentum dispersion relation of plasmarons in bilayer graphene. in Physical Review B. 2013;88(16):165420.
doi:10.1103/PhysRevB.88.165420 .

Krstajić, Predrag, Peeters, F. M., "Energy-momentum dispersion relation of plasmarons in bilayer graphene" in Physical Review B, 88, no. 16 (2013):165420,
https://doi.org/10.1103/PhysRevB.88.165420 . .

TY  - JOUR
AU  - Krstajić, Predrag
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1220
AB  - Analytical expression for the Hall conductivity sigma(yx) in graphene is derived in more general case, in which magnetic field is not perpendicular to the plane of the sample. The derivations were carried out using Kubo-Greenwood formulism, which is more suitable when the spectrum is discrete. The results are analyzed as a function of the angle between the magnetic field vector and the normal of the graphene plane. Contrary to the previous theoretical studies, we show that the plateau levels are independent of the direction of the magnetic field. The positions of the plateaus, however, depend on the orientation of the magnetic field.
PB  - Amer Inst Physics, Melville
T2  - Journal of Applied Physics
T1  - Integer quantum Hall effect in single-layer graphene with tilted magnetic field
VL  - 114
IS  - 7
DO  - 10.1063/1.4818605
ER  - 

@article{
author = "Krstajić, Predrag",
year = "2013",
abstract = "Analytical expression for the Hall conductivity sigma(yx) in graphene is derived in more general case, in which magnetic field is not perpendicular to the plane of the sample. The derivations were carried out using Kubo-Greenwood formulism, which is more suitable when the spectrum is discrete. The results are analyzed as a function of the angle between the magnetic field vector and the normal of the graphene plane. Contrary to the previous theoretical studies, we show that the plateau levels are independent of the direction of the magnetic field. The positions of the plateaus, however, depend on the orientation of the magnetic field.",
publisher = "Amer Inst Physics, Melville",
journal = "Journal of Applied Physics",
title = "Integer quantum Hall effect in single-layer graphene with tilted magnetic field",
volume = "114",
number = "7",
doi = "10.1063/1.4818605"
}

Krstajić, P.. (2013). Integer quantum Hall effect in single-layer graphene with tilted magnetic field. in Journal of Applied Physics
Amer Inst Physics, Melville., 114(7).
https://doi.org/10.1063/1.4818605

Krstajić P. Integer quantum Hall effect in single-layer graphene with tilted magnetic field. in Journal of Applied Physics. 2013;114(7).
doi:10.1063/1.4818605 .

Krstajić, Predrag, "Integer quantum Hall effect in single-layer graphene with tilted magnetic field" in Journal of Applied Physics, 114, no. 7 (2013),
https://doi.org/10.1063/1.4818605 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Peeters, F. M.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/991
AB  - The Coulomb interaction and the correlation of a remote electron with a single layer of graphene is investigated in the presence of a magnetic field applied perpendicular to the graphene layer. The remote electron polarizes the electron gas in the graphene layer, which we describe in terms of excitations of virtual plasmons in graphene. The composite quasiparticle formed by electron plus polarization is called a plasmon polaron. The ground-state energy of this quasiparticle is calculated within perturbation theory for remote electrons in different environments.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Remote electron plasmon polaron in graphene
VL  - 85
IS  - 8
SP  - 085436
DO  - 10.1103/PhysRevB.85.085436
ER  - 

@article{
author = "Krstajić, Predrag and Peeters, F. M.",
year = "2012",
abstract = "The Coulomb interaction and the correlation of a remote electron with a single layer of graphene is investigated in the presence of a magnetic field applied perpendicular to the graphene layer. The remote electron polarizes the electron gas in the graphene layer, which we describe in terms of excitations of virtual plasmons in graphene. The composite quasiparticle formed by electron plus polarization is called a plasmon polaron. The ground-state energy of this quasiparticle is calculated within perturbation theory for remote electrons in different environments.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Remote electron plasmon polaron in graphene",
volume = "85",
number = "8",
pages = "085436",
doi = "10.1103/PhysRevB.85.085436"
}

Krstajić, P.,& Peeters, F. M.. (2012). Remote electron plasmon polaron in graphene. in Physical Review B
Amer Physical Soc, College Pk., 85(8), 085436.
https://doi.org/10.1103/PhysRevB.85.085436

Krstajić P, Peeters FM. Remote electron plasmon polaron in graphene. in Physical Review B. 2012;85(8):085436.
doi:10.1103/PhysRevB.85.085436 .

Krstajić, Predrag, Peeters, F. M., "Remote electron plasmon polaron in graphene" in Physical Review B, 85, no. 8 (2012):085436,
https://doi.org/10.1103/PhysRevB.85.085436 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1131
AB  - Analytical expressions for the Hall conductivity sigma(yx) and the longitudinal resistivity rho(xx) are derived in gapped, single-layer graphene using linear response theory. The gap 2 Delta, described by a mass term, is induced by a substrate made of hexagonal boron nitride (h-BN) and produces two levels at +/-Delta. It is shown that syx has the same form as for a graphene sample supported by a common substrate without a mass term. The differences are a shift in the energy spectrum, which is not symmetric with respect to the Dirac point for either valley due to the gap, the absence of a zero-energy Landau level, and the nonequivalence of the K and K' valleys. In addition, the dispersion of the energy levels, caused by electron scattering by impurities, modifies mostly plateaus due to the levels at +/-Delta. It is shown that the resistivity rho(xx) exhibits an oscillatory dependence on the electron concentration. The main difference with the usual graphene samples, on SiO2 substrates, occurs near zero concentration, as the energy spectra differ mostly near the Dirac point.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Integer quantum Hall effect in gapped single-layer graphene
VL  - 86
IS  - 11
SP  - 115432
DO  - 10.1103/PhysRevB.86.115432
ER  - 

@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2012",
abstract = "Analytical expressions for the Hall conductivity sigma(yx) and the longitudinal resistivity rho(xx) are derived in gapped, single-layer graphene using linear response theory. The gap 2 Delta, described by a mass term, is induced by a substrate made of hexagonal boron nitride (h-BN) and produces two levels at +/-Delta. It is shown that syx has the same form as for a graphene sample supported by a common substrate without a mass term. The differences are a shift in the energy spectrum, which is not symmetric with respect to the Dirac point for either valley due to the gap, the absence of a zero-energy Landau level, and the nonequivalence of the K and K' valleys. In addition, the dispersion of the energy levels, caused by electron scattering by impurities, modifies mostly plateaus due to the levels at +/-Delta. It is shown that the resistivity rho(xx) exhibits an oscillatory dependence on the electron concentration. The main difference with the usual graphene samples, on SiO2 substrates, occurs near zero concentration, as the energy spectra differ mostly near the Dirac point.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Integer quantum Hall effect in gapped single-layer graphene",
volume = "86",
number = "11",
pages = "115432",
doi = "10.1103/PhysRevB.86.115432"
}

Krstajić, P.,& Vasilopoulos, P.. (2012). Integer quantum Hall effect in gapped single-layer graphene. in Physical Review B
Amer Physical Soc, College Pk., 86(11), 115432.
https://doi.org/10.1103/PhysRevB.86.115432

Krstajić P, Vasilopoulos P. Integer quantum Hall effect in gapped single-layer graphene. in Physical Review B. 2012;86(11):115432.
doi:10.1103/PhysRevB.86.115432 .

Krstajić, Predrag, Vasilopoulos, Panagiotis, "Integer quantum Hall effect in gapped single-layer graphene" in Physical Review B, 86, no. 11 (2012):115432,
https://doi.org/10.1103/PhysRevB.86.115432 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Peeters, F. M.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/957
AB  - The many-body correction to the band structure of a quasi-free-standing graphene layer is obtained within the Overhauser approach, where the electron-plasmon interaction is described as a field theoretical problem. We find that the Dirac-like spectrum is shifted by Delta E(k = 0), which is on the order of 50-150 meV, depending on the electron concentration n(e), and is in semiquantitative agreement with experimental data. The value of the Fermi velocity is renormalized by several percents and decreases with increasing electron concentration as found experimentally.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Energy-momentum dispersion relation of plasmarons in graphene
VL  - 85
IS  - 20
SP  - 205454
DO  - 10.1103/PhysRevB.85.205454
ER  - 

@article{
author = "Krstajić, Predrag and Peeters, F. M.",
year = "2012",
abstract = "The many-body correction to the band structure of a quasi-free-standing graphene layer is obtained within the Overhauser approach, where the electron-plasmon interaction is described as a field theoretical problem. We find that the Dirac-like spectrum is shifted by Delta E(k = 0), which is on the order of 50-150 meV, depending on the electron concentration n(e), and is in semiquantitative agreement with experimental data. The value of the Fermi velocity is renormalized by several percents and decreases with increasing electron concentration as found experimentally.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Energy-momentum dispersion relation of plasmarons in graphene",
volume = "85",
number = "20",
pages = "205454",
doi = "10.1103/PhysRevB.85.205454"
}

Krstajić, P.,& Peeters, F. M.. (2012). Energy-momentum dispersion relation of plasmarons in graphene. in Physical Review B
Amer Physical Soc, College Pk., 85(20), 205454.
https://doi.org/10.1103/PhysRevB.85.205454

Krstajić P, Peeters FM. Energy-momentum dispersion relation of plasmarons in graphene. in Physical Review B. 2012;85(20):205454.
doi:10.1103/PhysRevB.85.205454 .

Krstajić, Predrag, Peeters, F. M., "Energy-momentum dispersion relation of plasmarons in graphene" in Physical Review B, 85, no. 20 (2012):205454,
https://doi.org/10.1103/PhysRevB.85.205454 . .

TY  - JOUR
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Frantlović, Miloš
AU  - Radulović, Katarina
AU  - Krstajić, Predrag
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1132
AB  - We present a simple mathematical model of adsorbed mass fluctuations in microcantilever sensors operating in liquids, taking into account the effects of the transfer process of analyte molecules from a solution to the sensor surface. Using the derived expressions the analysis is performed in order to estimate the influence of mass transfer on the equilibrium fluctuations of the measured signal. The results show that mass transfer significantly influences the spectrum of fluctuations. The theory is useful for determination of limiting performances of cantilever sensors and for characterization of molecular binding-unbinding interactions using measured fluctuations in the sensor's signal.
PB  - Elsevier
T2  - Microelectronic Engineering
T1  - Fluctuations of the mass adsorbed on microcantilever sensor surface in liquid-phase chemical and biochemical detection
VL  - 97
SP  - 396
EP  - 399
DO  - 10.1016/j.mee.2012.03.038
ER  - 

@article{
author = "Jokić, Ivana and Đurić, Zoran G. and Frantlović, Miloš and Radulović, Katarina and Krstajić, Predrag",
year = "2012",
abstract = "We present a simple mathematical model of adsorbed mass fluctuations in microcantilever sensors operating in liquids, taking into account the effects of the transfer process of analyte molecules from a solution to the sensor surface. Using the derived expressions the analysis is performed in order to estimate the influence of mass transfer on the equilibrium fluctuations of the measured signal. The results show that mass transfer significantly influences the spectrum of fluctuations. The theory is useful for determination of limiting performances of cantilever sensors and for characterization of molecular binding-unbinding interactions using measured fluctuations in the sensor's signal.",
publisher = "Elsevier",
journal = "Microelectronic Engineering",
title = "Fluctuations of the mass adsorbed on microcantilever sensor surface in liquid-phase chemical and biochemical detection",
volume = "97",
pages = "396-399",
doi = "10.1016/j.mee.2012.03.038"
}

Jokić, I., Đurić, Z. G., Frantlović, M., Radulović, K.,& Krstajić, P.. (2012). Fluctuations of the mass adsorbed on microcantilever sensor surface in liquid-phase chemical and biochemical detection. in Microelectronic Engineering
Elsevier., 97, 396-399.
https://doi.org/10.1016/j.mee.2012.03.038

Jokić I, Đurić ZG, Frantlović M, Radulović K, Krstajić P. Fluctuations of the mass adsorbed on microcantilever sensor surface in liquid-phase chemical and biochemical detection. in Microelectronic Engineering. 2012;97:396-399.
doi:10.1016/j.mee.2012.03.038 .

Jokić, Ivana, Đurić, Zoran G., Frantlović, Miloš, Radulović, Katarina, Krstajić, Predrag, "Fluctuations of the mass adsorbed on microcantilever sensor surface in liquid-phase chemical and biochemical detection" in Microelectronic Engineering, 97 (2012):396-399,
https://doi.org/10.1016/j.mee.2012.03.038 . .

TY  - JOUR
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Frantlović, Miloš
AU  - Radulović, Katarina
AU  - Krstajić, Predrag
AU  - Jokic, Zorana
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/970
AB  - We derived a simple theory of fluctuations of the equilibrium number of adsorbed molecules in biosensors, caused by the stochastic nature of adsorption-desorption (AD) processes coupled with mass transfer. The two-compartment model is used for approximation of the spatial dependence of analyte concentration in the reaction chamber, which is justified when a thin layer depleted of the analyte exists close to the surface on which the binding reaction occurs. By using the obtained analytical expression for the power spectral density of fluctuations we perform for the first time the quantitative analysis of the influence of the mass transfer on the fluctuations spectrum. For realistic parameter values, the influence of mass transfer proved to be significant, causing the increase in the fluctuations level of up to two orders of magnitude compared to the rapid mixing case. The dependences of the mass transfer influenced fluctuations spectrum on various parameters of the analyte-receptor binding process are also systematically investigated. The presented theoretical model of fluctuations enables good estimation of the AD noise, which affects the total noise and the minimal detectable signal of biosensors. It provides the guidelines for improvement of the limits of detection, and for optimization of detection methods. The theory is also proposed as a basis for development of highly sensitive methods for analyte detection and characterization of biomolecular binding processes, based on the measured fluctuations spectrum. It is applicable for various types of sensors whose operation principle relies on the adsorption process of analyte molecules.
PB  - Elsevier
T2  - Sensors and Actuators, B: Chemical
T1  - Fluctuations of the number of adsorbed molecules in biosensors due to stochastic adsorption-desorption processes coupled with mass transfer
VL  - 166
SP  - 535
EP  - 543
DO  - 10.1016/j.snb.2012.03.004
ER  - 

@article{
author = "Jokić, Ivana and Đurić, Zoran G. and Frantlović, Miloš and Radulović, Katarina and Krstajić, Predrag and Jokic, Zorana",
year = "2012",
abstract = "We derived a simple theory of fluctuations of the equilibrium number of adsorbed molecules in biosensors, caused by the stochastic nature of adsorption-desorption (AD) processes coupled with mass transfer. The two-compartment model is used for approximation of the spatial dependence of analyte concentration in the reaction chamber, which is justified when a thin layer depleted of the analyte exists close to the surface on which the binding reaction occurs. By using the obtained analytical expression for the power spectral density of fluctuations we perform for the first time the quantitative analysis of the influence of the mass transfer on the fluctuations spectrum. For realistic parameter values, the influence of mass transfer proved to be significant, causing the increase in the fluctuations level of up to two orders of magnitude compared to the rapid mixing case. The dependences of the mass transfer influenced fluctuations spectrum on various parameters of the analyte-receptor binding process are also systematically investigated. The presented theoretical model of fluctuations enables good estimation of the AD noise, which affects the total noise and the minimal detectable signal of biosensors. It provides the guidelines for improvement of the limits of detection, and for optimization of detection methods. The theory is also proposed as a basis for development of highly sensitive methods for analyte detection and characterization of biomolecular binding processes, based on the measured fluctuations spectrum. It is applicable for various types of sensors whose operation principle relies on the adsorption process of analyte molecules.",
publisher = "Elsevier",
journal = "Sensors and Actuators, B: Chemical",
title = "Fluctuations of the number of adsorbed molecules in biosensors due to stochastic adsorption-desorption processes coupled with mass transfer",
volume = "166",
pages = "535-543",
doi = "10.1016/j.snb.2012.03.004"
}

Jokić, I., Đurić, Z. G., Frantlović, M., Radulović, K., Krstajić, P.,& Jokic, Z.. (2012). Fluctuations of the number of adsorbed molecules in biosensors due to stochastic adsorption-desorption processes coupled with mass transfer. in Sensors and Actuators, B: Chemical
Elsevier., 166, 535-543.
https://doi.org/10.1016/j.snb.2012.03.004

Jokić I, Đurić ZG, Frantlović M, Radulović K, Krstajić P, Jokic Z. Fluctuations of the number of adsorbed molecules in biosensors due to stochastic adsorption-desorption processes coupled with mass transfer. in Sensors and Actuators, B: Chemical. 2012;166:535-543.
doi:10.1016/j.snb.2012.03.004 .

Jokić, Ivana, Đurić, Zoran G., Frantlović, Miloš, Radulović, Katarina, Krstajić, Predrag, Jokic, Zorana, "Fluctuations of the number of adsorbed molecules in biosensors due to stochastic adsorption-desorption processes coupled with mass transfer" in Sensors and Actuators, B: Chemical, 166 (2012):535-543,
https://doi.org/10.1016/j.snb.2012.03.004 . .

TY  - CONF
AU  - Jokić, Ivana
AU  - Đurić, Zoran
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Krstajić, Predrag
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5741
AB  - Micro/nanoelectromechanical (MEMS/NEMS) sensors, whose principle of operation is based on adsorptiondesorption process, are highly sensitive, selective, small and portable. In this paper the theoretical analysis is presented
of both the response and the spectrum of adsorption-desorption noise of such sensors intended for detection of substances present in gas or in liquid phase.
PB  - Belgrade : The Military Technical Institute
C3  - Proceedings -  4th International Scientific Conference on Defensive Technologies OTEH 2011, 6-7 October, 2011, Belgrade
T1  - Analysis of response and adsorption-desorption fluctuations spectrum of MEMS/NEMS chemical and biological sensors
SP  - 447
EP  - 451
UR  - https://hdl.handle.net/21.15107/rcub_cer_5741
ER  - 

@conference{
author = "Jokić, Ivana and Đurić, Zoran and Radulović, Katarina and Frantlović, Miloš and Krstajić, Predrag",
year = "2011",
abstract = "Micro/nanoelectromechanical (MEMS/NEMS) sensors, whose principle of operation is based on adsorptiondesorption process, are highly sensitive, selective, small and portable. In this paper the theoretical analysis is presented
of both the response and the spectrum of adsorption-desorption noise of such sensors intended for detection of substances present in gas or in liquid phase.",
publisher = "Belgrade : The Military Technical Institute",
journal = "Proceedings -  4th International Scientific Conference on Defensive Technologies OTEH 2011, 6-7 October, 2011, Belgrade",
title = "Analysis of response and adsorption-desorption fluctuations spectrum of MEMS/NEMS chemical and biological sensors",
pages = "447-451",
url = "https://hdl.handle.net/21.15107/rcub_cer_5741"
}

Jokić, I., Đurić, Z., Radulović, K., Frantlović, M.,& Krstajić, P.. (2011). Analysis of response and adsorption-desorption fluctuations spectrum of MEMS/NEMS chemical and biological sensors. in Proceedings -  4th International Scientific Conference on Defensive Technologies OTEH 2011, 6-7 October, 2011, Belgrade
Belgrade : The Military Technical Institute., 447-451.
https://hdl.handle.net/21.15107/rcub_cer_5741

Jokić I, Đurić Z, Radulović K, Frantlović M, Krstajić P. Analysis of response and adsorption-desorption fluctuations spectrum of MEMS/NEMS chemical and biological sensors. in Proceedings -  4th International Scientific Conference on Defensive Technologies OTEH 2011, 6-7 October, 2011, Belgrade. 2011;:447-451.
https://hdl.handle.net/21.15107/rcub_cer_5741 .

Jokić, Ivana, Đurić, Zoran, Radulović, Katarina, Frantlović, Miloš, Krstajić, Predrag, "Analysis of response and adsorption-desorption fluctuations spectrum of MEMS/NEMS chemical and biological sensors" in Proceedings -  4th International Scientific Conference on Defensive Technologies OTEH 2011, 6-7 October, 2011, Belgrade (2011):447-451,
https://hdl.handle.net/21.15107/rcub_cer_5741 .

TY  - CONF
AU  - Đurić, Zoran G.
AU  - Randjelović, Danijela
AU  - Krstajić, Predrag
AU  - Jokić, Ivana
AU  - Djukic, M.
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/833
AB  - We developed a theory for the infrared (IR) thermal detector whose function is based on the dependence of the microcantilever resonant frequency on the thermal stress caused by IR radiation. We study performance of such a sensor using the general theory of microcantilever based resonators. The stress in the microcantilever is a result of the combined effect of the room temperature built-in stress stemming from the fabrication process and the thermal stress caused by the beam heating. We derive for the first time the analytical expressions for basic parameters, sensitivity, noise and detectivity, of such a sensor.
PB  - Elsevier
C3  - Eurosensors Xxv
T1  - Theory of Infrared Detector Based on the Microcantilever Resonant Frequency Temperature Dependence
VL  - 25
DO  - 10.1016/j.proeng.2011.12.095
ER  - 

@conference{
author = "Đurić, Zoran G. and Randjelović, Danijela and Krstajić, Predrag and Jokić, Ivana and Djukic, M.",
year = "2011",
abstract = "We developed a theory for the infrared (IR) thermal detector whose function is based on the dependence of the microcantilever resonant frequency on the thermal stress caused by IR radiation. We study performance of such a sensor using the general theory of microcantilever based resonators. The stress in the microcantilever is a result of the combined effect of the room temperature built-in stress stemming from the fabrication process and the thermal stress caused by the beam heating. We derive for the first time the analytical expressions for basic parameters, sensitivity, noise and detectivity, of such a sensor.",
publisher = "Elsevier",
journal = "Eurosensors Xxv",
title = "Theory of Infrared Detector Based on the Microcantilever Resonant Frequency Temperature Dependence",
volume = "25",
doi = "10.1016/j.proeng.2011.12.095"
}

Đurić, Z. G., Randjelović, D., Krstajić, P., Jokić, I.,& Djukic, M.. (2011). Theory of Infrared Detector Based on the Microcantilever Resonant Frequency Temperature Dependence. in Eurosensors Xxv
Elsevier., 25.
https://doi.org/10.1016/j.proeng.2011.12.095

Đurić ZG, Randjelović D, Krstajić P, Jokić I, Djukic M. Theory of Infrared Detector Based on the Microcantilever Resonant Frequency Temperature Dependence. in Eurosensors Xxv. 2011;25.
doi:10.1016/j.proeng.2011.12.095 .

Đurić, Zoran G., Randjelović, Danijela, Krstajić, Predrag, Jokić, Ivana, Djukic, M., "Theory of Infrared Detector Based on the Microcantilever Resonant Frequency Temperature Dependence" in Eurosensors Xxv, 25 (2011),
https://doi.org/10.1016/j.proeng.2011.12.095 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/905
AB  - We investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.
PB  - Iop Publishing Ltd, Bristol
T2  - Journal of Physics-Condensed Matter
T1  - Ballistic transport through graphene nanostructures of velocity and potential barriers
VL  - 23
IS  - 13
DO  - 10.1088/0953-8984/23/13/135302
ER  - 

@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2011",
abstract = "We investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.",
publisher = "Iop Publishing Ltd, Bristol",
journal = "Journal of Physics-Condensed Matter",
title = "Ballistic transport through graphene nanostructures of velocity and potential barriers",
volume = "23",
number = "13",
doi = "10.1088/0953-8984/23/13/135302"
}

Krstajić, P.,& Vasilopoulos, P.. (2011). Ballistic transport through graphene nanostructures of velocity and potential barriers. in Journal of Physics-Condensed Matter
Iop Publishing Ltd, Bristol., 23(13).
https://doi.org/10.1088/0953-8984/23/13/135302

Krstajić P, Vasilopoulos P. Ballistic transport through graphene nanostructures of velocity and potential barriers. in Journal of Physics-Condensed Matter. 2011;23(13).
doi:10.1088/0953-8984/23/13/135302 .

Krstajić, Predrag, Vasilopoulos, Panagiotis, "Ballistic transport through graphene nanostructures of velocity and potential barriers" in Journal of Physics-Condensed Matter, 23, no. 13 (2011),
https://doi.org/10.1088/0953-8984/23/13/135302 . .