TY  - JOUR
AU  - Antusek, Andrej
AU  - Blasko, Martin
AU  - Urban, Miroslav
AU  - Noga, Pavol
AU  - Kisic, Danilo
AU  - Nenadović, Miloš
AU  - Lončarević, Davor
AU  - Rakočević, Zlatko Lj.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2164
AB  - We have studied processes of gold ion implantation in polyethylene (PE) by theoretical chemistry methods. Car-Parrinello molecular dynamics (CPMD) simulations of collisions and following chemical kinetics considerations lead to the conclusion that chemical bonds between gold atoms and PE chains are formed. We have identified and characterized by a DFT method various stable structures with C-Au, C-Au-C, C-Au-H and C-Au center dot center dot center dot H-2 types of chemical bonds. The binding energies (BE) of C-Au bonds are as high as 227 kJ mol(-1) and the bond analysis reveals a covalent bonding character. For the experimental detection of these structures in gold implanted PE, we predicted characteristic infra-red (IR) frequencies. The C-Au stretching vibrational modes lie around 500 cm(-1). Other characteristic frequencies lie in a band between 730 cm(-1) and 1500 cm(-1).
PB  - Royal Soc Chemistry, Cambridge
T2  - Physical Chemistry Chemical Physics
T1  - Density functional theory modeling of C-Au chemical bond formation in gold implanted polyethylene
VL  - 19
IS  - 42
SP  - 28897
EP  - 28906
DO  - 10.1039/c7cp05637k
ER  - 

@article{
author = "Antusek, Andrej and Blasko, Martin and Urban, Miroslav and Noga, Pavol and Kisic, Danilo and Nenadović, Miloš and Lončarević, Davor and Rakočević, Zlatko Lj.",
year = "2017",
abstract = "We have studied processes of gold ion implantation in polyethylene (PE) by theoretical chemistry methods. Car-Parrinello molecular dynamics (CPMD) simulations of collisions and following chemical kinetics considerations lead to the conclusion that chemical bonds between gold atoms and PE chains are formed. We have identified and characterized by a DFT method various stable structures with C-Au, C-Au-C, C-Au-H and C-Au center dot center dot center dot H-2 types of chemical bonds. The binding energies (BE) of C-Au bonds are as high as 227 kJ mol(-1) and the bond analysis reveals a covalent bonding character. For the experimental detection of these structures in gold implanted PE, we predicted characteristic infra-red (IR) frequencies. The C-Au stretching vibrational modes lie around 500 cm(-1). Other characteristic frequencies lie in a band between 730 cm(-1) and 1500 cm(-1).",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Physical Chemistry Chemical Physics",
title = "Density functional theory modeling of C-Au chemical bond formation in gold implanted polyethylene",
volume = "19",
number = "42",
pages = "28897-28906",
doi = "10.1039/c7cp05637k"
}

Antusek, A., Blasko, M., Urban, M., Noga, P., Kisic, D., Nenadović, M., Lončarević, D.,& Rakočević, Z. Lj.. (2017). Density functional theory modeling of C-Au chemical bond formation in gold implanted polyethylene. in Physical Chemistry Chemical Physics
Royal Soc Chemistry, Cambridge., 19(42), 28897-28906.
https://doi.org/10.1039/c7cp05637k

Antusek A, Blasko M, Urban M, Noga P, Kisic D, Nenadović M, Lončarević D, Rakočević ZL. Density functional theory modeling of C-Au chemical bond formation in gold implanted polyethylene. in Physical Chemistry Chemical Physics. 2017;19(42):28897-28906.
doi:10.1039/c7cp05637k .

Antusek, Andrej, Blasko, Martin, Urban, Miroslav, Noga, Pavol, Kisic, Danilo, Nenadović, Miloš, Lončarević, Davor, Rakočević, Zlatko Lj., "Density functional theory modeling of C-Au chemical bond formation in gold implanted polyethylene" in Physical Chemistry Chemical Physics, 19, no. 42 (2017):28897-28906,
https://doi.org/10.1039/c7cp05637k . .

TY  - JOUR
AU  - Maksic, A
AU  - Rakočević, Zlatko Lj.
AU  - Smiljanić, Milutin
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1754
AB  - Bimetallic electrodes prepared by Pd nanoislands spontaneously deposited on polycrystalline platinum, Pt(poly), at submonolayer coverage were explored for methanol oxidation in alkaline media. Characterization of obtained Pd/Pt(poly) nanostructures was performed ex situ by AFM imaging, spectroscopic ellipsometry and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent methanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Platinum surface with 35% Pd coverage exhibited the highest catalytic activity for methanol oxidation in alkaline media, exceeding those of bare Pt and Pd. Both synergistic and electronic effects are responsible for such enhanced catalysis. The origin of the synergistic effect and possible reaction pathways for methanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and formaldehyde, as the most probable reaction intermediates.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Methanol oxidation on Pd/Pt(poly) in alkaline solution
VL  - 273
SP  - 724
EP  - 734
DO  - 10.1016/j.jpowsour.2014.09.138
ER  - 

@article{
author = "Maksic, A and Rakočević, Zlatko Lj. and Smiljanić, Milutin and Nenadović, Miloš and Štrbac, Svetlana",
year = "2015",
abstract = "Bimetallic electrodes prepared by Pd nanoislands spontaneously deposited on polycrystalline platinum, Pt(poly), at submonolayer coverage were explored for methanol oxidation in alkaline media. Characterization of obtained Pd/Pt(poly) nanostructures was performed ex situ by AFM imaging, spectroscopic ellipsometry and by X-ray photoelectron spectroscopy. In situ characterization of the obtained electrodes and subsequent methanol oxidation measurements were performed by cyclic voltammetry in 0.1 M KOH. Platinum surface with 35% Pd coverage exhibited the highest catalytic activity for methanol oxidation in alkaline media, exceeding those of bare Pt and Pd. Both synergistic and electronic effects are responsible for such enhanced catalysis. The origin of the synergistic effect and possible reaction pathways for methanol oxidation were discussed taking into account the activity of obtained bimetallic electrodes for the oxidation of CO and formaldehyde, as the most probable reaction intermediates.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Methanol oxidation on Pd/Pt(poly) in alkaline solution",
volume = "273",
pages = "724-734",
doi = "10.1016/j.jpowsour.2014.09.138"
}

Maksic, A., Rakočević, Z. Lj., Smiljanić, M., Nenadović, M.,& Štrbac, S.. (2015). Methanol oxidation on Pd/Pt(poly) in alkaline solution. in Journal of Power Sources
Elsevier., 273, 724-734.
https://doi.org/10.1016/j.jpowsour.2014.09.138

Maksic A, Rakočević ZL, Smiljanić M, Nenadović M, Štrbac S. Methanol oxidation on Pd/Pt(poly) in alkaline solution. in Journal of Power Sources. 2015;273:724-734.
doi:10.1016/j.jpowsour.2014.09.138 .

Maksic, A, Rakočević, Zlatko Lj., Smiljanić, Milutin, Nenadović, Miloš, Štrbac, Svetlana, "Methanol oxidation on Pd/Pt(poly) in alkaline solution" in Journal of Power Sources, 273 (2015):724-734,
https://doi.org/10.1016/j.jpowsour.2014.09.138 . .

TY  - JOUR
AU  - Srejić, Irina
AU  - Rakočević, Zlatko Lj.
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1642
AB  - Oxygen reduction reaction (ORR) was investigated on polycrystalline palladium, Pd(poly), in acid and alkaline solutions using rotating-disc electrode technique. Pd(poly) was prepared in non-aqueous media which provided surface with good quality and reproducibility. According to cyclic voltammetry curves and to the analysis of polarization curves for ORR and of ones obtained separately for hydrogen peroxide reduction/oxidation reactions, ORR in both media proceeds mainly through 4e-series pathway in the potential regions where Pd surface is either oxide free or oxidized to PdOH. ORR occurs partly through 2e-reduction in the potential region where PdO is present on the surface. As revealed by cyclic voltammetry, spectroscopic ellipsometry and by atomic force microscopy, Pd(poly) surface undergoes both topography and chemical changes during ORR. Pd surface roughness as well as the degree of its oxidation increase during ORR.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Electrochimica Acta
T1  - Oxygen reduction on polycrystalline palladium in acid and alkaline solutions: topographical and chemical Pd surface changes
VL  - 169
SP  - 22
EP  - 31
DO  - 10.1016/j.electacta.2015.04.032
ER  - 

@article{
author = "Srejić, Irina and Rakočević, Zlatko Lj. and Nenadović, Miloš and Štrbac, Svetlana",
year = "2015",
abstract = "Oxygen reduction reaction (ORR) was investigated on polycrystalline palladium, Pd(poly), in acid and alkaline solutions using rotating-disc electrode technique. Pd(poly) was prepared in non-aqueous media which provided surface with good quality and reproducibility. According to cyclic voltammetry curves and to the analysis of polarization curves for ORR and of ones obtained separately for hydrogen peroxide reduction/oxidation reactions, ORR in both media proceeds mainly through 4e-series pathway in the potential regions where Pd surface is either oxide free or oxidized to PdOH. ORR occurs partly through 2e-reduction in the potential region where PdO is present on the surface. As revealed by cyclic voltammetry, spectroscopic ellipsometry and by atomic force microscopy, Pd(poly) surface undergoes both topography and chemical changes during ORR. Pd surface roughness as well as the degree of its oxidation increase during ORR.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Electrochimica Acta",
title = "Oxygen reduction on polycrystalline palladium in acid and alkaline solutions: topographical and chemical Pd surface changes",
volume = "169",
pages = "22-31",
doi = "10.1016/j.electacta.2015.04.032"
}

Srejić, I., Rakočević, Z. Lj., Nenadović, M.,& Štrbac, S.. (2015). Oxygen reduction on polycrystalline palladium in acid and alkaline solutions: topographical and chemical Pd surface changes. in Electrochimica Acta
Oxford : Pergamon-Elsevier Science Ltd., 169, 22-31.
https://doi.org/10.1016/j.electacta.2015.04.032

Srejić I, Rakočević ZL, Nenadović M, Štrbac S. Oxygen reduction on polycrystalline palladium in acid and alkaline solutions: topographical and chemical Pd surface changes. in Electrochimica Acta. 2015;169:22-31.
doi:10.1016/j.electacta.2015.04.032 .

Srejić, Irina, Rakočević, Zlatko Lj., Nenadović, Miloš, Štrbac, Svetlana, "Oxygen reduction on polycrystalline palladium in acid and alkaline solutions: topographical and chemical Pd surface changes" in Electrochimica Acta, 169 (2015):22-31,
https://doi.org/10.1016/j.electacta.2015.04.032 . .

TY  - JOUR
AU  - Kisic, Danilo
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
AU  - Adnađević, Borivoj K.
AU  - Rakočević, Zlatko Lj.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1582
AB  - The effect of ultraviolet (UV) ozone treatment on the surface properties of gold implanted high density polyethylene (HDPE) was investigated at a nanoscale using Atomic Force Microscopy (AFM). HDPE samples were modified by the implantation of gold ions at a dose of 5 x 10(15) ions/cm(2), using energies of 50, 100, 150, and 200 keV, and subsequently treated with UV/ozone. AFM surface topography images revealed that after UV/ozone treatment, the surface roughness of all Au/HDPE samples increased, while Power Spectral Density function increased only for samples implanted using higher energies, with a maximum for 150 keV. The chemical surface composition was homogenous in all cases, which was evidenced by appearance of single peaks in the histograms obtained from the phase AFM images. For UV/ozone treated samples, the shift of the peaks positions in the histograms to the higher values of the phase lag with respect to untreated ones indicated the decrease of surface hardness. Besides, a significant change of fractal dimension of surface grains is observed after UV/ozone treatment.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Effect of UV/ozone treatment on the nanoscale surface properties of gold implanted polyethylene
VL  - 307
SP  - 311
EP  - 318
DO  - 10.1016/j.apsusc.2014.04.032
ER  - 

@article{
author = "Kisic, Danilo and Nenadović, Miloš and Štrbac, Svetlana and Adnađević, Borivoj K. and Rakočević, Zlatko Lj.",
year = "2014",
abstract = "The effect of ultraviolet (UV) ozone treatment on the surface properties of gold implanted high density polyethylene (HDPE) was investigated at a nanoscale using Atomic Force Microscopy (AFM). HDPE samples were modified by the implantation of gold ions at a dose of 5 x 10(15) ions/cm(2), using energies of 50, 100, 150, and 200 keV, and subsequently treated with UV/ozone. AFM surface topography images revealed that after UV/ozone treatment, the surface roughness of all Au/HDPE samples increased, while Power Spectral Density function increased only for samples implanted using higher energies, with a maximum for 150 keV. The chemical surface composition was homogenous in all cases, which was evidenced by appearance of single peaks in the histograms obtained from the phase AFM images. For UV/ozone treated samples, the shift of the peaks positions in the histograms to the higher values of the phase lag with respect to untreated ones indicated the decrease of surface hardness. Besides, a significant change of fractal dimension of surface grains is observed after UV/ozone treatment.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Effect of UV/ozone treatment on the nanoscale surface properties of gold implanted polyethylene",
volume = "307",
pages = "311-318",
doi = "10.1016/j.apsusc.2014.04.032"
}

Kisic, D., Nenadović, M., Štrbac, S., Adnađević, B. K.,& Rakočević, Z. Lj.. (2014). Effect of UV/ozone treatment on the nanoscale surface properties of gold implanted polyethylene. in Applied Surface Science
Elsevier., 307, 311-318.
https://doi.org/10.1016/j.apsusc.2014.04.032

Kisic D, Nenadović M, Štrbac S, Adnađević BK, Rakočević ZL. Effect of UV/ozone treatment on the nanoscale surface properties of gold implanted polyethylene. in Applied Surface Science. 2014;307:311-318.
doi:10.1016/j.apsusc.2014.04.032 .

Kisic, Danilo, Nenadović, Miloš, Štrbac, Svetlana, Adnađević, Borivoj K., Rakočević, Zlatko Lj., "Effect of UV/ozone treatment on the nanoscale surface properties of gold implanted polyethylene" in Applied Surface Science, 307 (2014):311-318,
https://doi.org/10.1016/j.apsusc.2014.04.032 . .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Mitrić, Miodrag
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1262
AB  - High density polyethylene (HDPE) samples were modified by Au+ ion implantation at a dose of 5 x 10(15) ions cm(-2), using energies of 50, 100, 150 and 200 keV. The existence of implanted gold in the near-surface region of HDPE samples was confirmed by X-ray diffraction analysis. Surface roughness and Power Spectral Density analyses based on Atomic Force Microscopy (AFM) images of the surface topography revealed that the mechanism of HDPE modification during gold ion implantation depended on the energy of gold ions. Histograms obtained from phase AFM images indicated a qualitative change in the chemical composition of the surface during implantation with gold ions with different energies. Depth profiles obtained experimentally from cross-sectional Force Modulation Microscopy images and ones obtained from a theoretical simulation are in agreement for gold ions energies lower than 100 keV. The deviation that was observed for higher energies of the gold ions is explained by carbon precipitation in the near surface region of the HDPE, which prevented the penetration of gold ions further into the depth of the sample.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Modification of high density polyethylene by gold implantation using different ion energies
VL  - 142
IS  - 2-3
SP  - 633
EP  - 639
DO  - 10.1016/j.matchemphys.2013.08.013
ER  - 

@article{
author = "Nenadović, Miloš and Potočnik, Jelena and Mitrić, Miodrag and Štrbac, Svetlana and Rakočević, Zlatko Lj.",
year = "2013",
abstract = "High density polyethylene (HDPE) samples were modified by Au+ ion implantation at a dose of 5 x 10(15) ions cm(-2), using energies of 50, 100, 150 and 200 keV. The existence of implanted gold in the near-surface region of HDPE samples was confirmed by X-ray diffraction analysis. Surface roughness and Power Spectral Density analyses based on Atomic Force Microscopy (AFM) images of the surface topography revealed that the mechanism of HDPE modification during gold ion implantation depended on the energy of gold ions. Histograms obtained from phase AFM images indicated a qualitative change in the chemical composition of the surface during implantation with gold ions with different energies. Depth profiles obtained experimentally from cross-sectional Force Modulation Microscopy images and ones obtained from a theoretical simulation are in agreement for gold ions energies lower than 100 keV. The deviation that was observed for higher energies of the gold ions is explained by carbon precipitation in the near surface region of the HDPE, which prevented the penetration of gold ions further into the depth of the sample.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Modification of high density polyethylene by gold implantation using different ion energies",
volume = "142",
number = "2-3",
pages = "633-639",
doi = "10.1016/j.matchemphys.2013.08.013"
}

Nenadović, M., Potočnik, J., Mitrić, M., Štrbac, S.,& Rakočević, Z. Lj.. (2013). Modification of high density polyethylene by gold implantation using different ion energies. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 142(2-3), 633-639.
https://doi.org/10.1016/j.matchemphys.2013.08.013

Nenadović M, Potočnik J, Mitrić M, Štrbac S, Rakočević ZL. Modification of high density polyethylene by gold implantation using different ion energies. in Materials Chemistry and Physics. 2013;142(2-3):633-639.
doi:10.1016/j.matchemphys.2013.08.013 .

Nenadović, Miloš, Potočnik, Jelena, Mitrić, Miodrag, Štrbac, Svetlana, Rakočević, Zlatko Lj., "Modification of high density polyethylene by gold implantation using different ion energies" in Materials Chemistry and Physics, 142, no. 2-3 (2013):633-639,
https://doi.org/10.1016/j.matchemphys.2013.08.013 . .

TY  - JOUR
AU  - Potočnik, Jelena
AU  - Nenadović, Miloš
AU  - Jokić, Bojan
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1361
AB  - In this work, a columnar structure of nickel thin film has been obtained using an advanced deposition technique known as Glancing Angle Deposition. Nickel thin film was deposited on glass sample at the constant emission current of 100 mA. Glass sample was positioned 15 degrees with respect to the nickel vapor flux. The obtained nickel thin film was characterized by Force Modulation Atomic Force Microscopy and by Scanning Electron Microscopy. Analysis indicated that the formation of the columnar structure occurred at the film thickness of 1 μm, which was achieved for the deposition time of 3 hours.
AB  - U ovom radu, stubičasta struktura tankog sloja nikla je dobijena korišćenjem napredne tehnike deponovanja pri malim uglovima. Tanki sloj nikla je deponovan na staklu, pri konstantnoj emisionoj struji koja je iznosila 100 mA. Podloga od stakla je postavljena, u odnosu na fluks pare nikla, pod uglom od 15 stepeni. Dobijeni tanki sloj nikla je karakterisan pomoću mikroskopa u polju atomskih sila i skanirajućeg elektronskog mikroskopa. Analiza ukazuje da se formiranje stubičaste strukture javlja pri debljini sloja nikla od 1 μm, a ta debljina je dobijena nakon 3 sata deponovanja.
PB  - International Institute for the Science of Sintering, Beograd
T2  - Science of Sintering
T1  - Structural characterization of the nickel thin film deposited by glad technique
VL  - 45
IS  - 1
SP  - 61
EP  - 67
DO  - 10.2298/SOS1301061P
ER  - 

@article{
author = "Potočnik, Jelena and Nenadović, Miloš and Jokić, Bojan and Štrbac, Svetlana and Rakočević, Zlatko Lj.",
year = "2013",
abstract = "In this work, a columnar structure of nickel thin film has been obtained using an advanced deposition technique known as Glancing Angle Deposition. Nickel thin film was deposited on glass sample at the constant emission current of 100 mA. Glass sample was positioned 15 degrees with respect to the nickel vapor flux. The obtained nickel thin film was characterized by Force Modulation Atomic Force Microscopy and by Scanning Electron Microscopy. Analysis indicated that the formation of the columnar structure occurred at the film thickness of 1 μm, which was achieved for the deposition time of 3 hours., U ovom radu, stubičasta struktura tankog sloja nikla je dobijena korišćenjem napredne tehnike deponovanja pri malim uglovima. Tanki sloj nikla je deponovan na staklu, pri konstantnoj emisionoj struji koja je iznosila 100 mA. Podloga od stakla je postavljena, u odnosu na fluks pare nikla, pod uglom od 15 stepeni. Dobijeni tanki sloj nikla je karakterisan pomoću mikroskopa u polju atomskih sila i skanirajućeg elektronskog mikroskopa. Analiza ukazuje da se formiranje stubičaste strukture javlja pri debljini sloja nikla od 1 μm, a ta debljina je dobijena nakon 3 sata deponovanja.",
publisher = "International Institute for the Science of Sintering, Beograd",
journal = "Science of Sintering",
title = "Structural characterization of the nickel thin film deposited by glad technique",
volume = "45",
number = "1",
pages = "61-67",
doi = "10.2298/SOS1301061P"
}

Potočnik, J., Nenadović, M., Jokić, B., Štrbac, S.,& Rakočević, Z. Lj.. (2013). Structural characterization of the nickel thin film deposited by glad technique. in Science of Sintering
International Institute for the Science of Sintering, Beograd., 45(1), 61-67.
https://doi.org/10.2298/SOS1301061P

Potočnik J, Nenadović M, Jokić B, Štrbac S, Rakočević ZL. Structural characterization of the nickel thin film deposited by glad technique. in Science of Sintering. 2013;45(1):61-67.
doi:10.2298/SOS1301061P .

Potočnik, Jelena, Nenadović, Miloš, Jokić, Bojan, Štrbac, Svetlana, Rakočević, Zlatko Lj., "Structural characterization of the nickel thin film deposited by glad technique" in Science of Sintering, 45, no. 1 (2013):61-67,
https://doi.org/10.2298/SOS1301061P . .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Ristic, M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/966
AB  - High density polyethylene (HDPE) has been modified by Ag+ and Au+ ion implantation with the energy of 60 and 200 keV, respectively. The doses of implanted silver and gold ions were as follows: 1 x 10(15), 5 x 10(15) and 1 x 10(16) ions/cm(2). The surface topography was observed using atomic force microscopy (AFM), while the surface composition changes were detected using phase imaging AFM. Phase analysis of AFM images shows that both physical and chemical changes occur on the surface of HDPE and that these changes depend on the nature of implanted ions and on the implantation dose. Silver ion implantation causes a higher degree of chemical changes, while the implantation of gold ions causes a higher degree of physical changes. Breakpoints were observed for the implantation doses of 0.6 x 10(15) and 4.4 x 10(15) ions/cm(2) for silver and gold ions, respectively. Physical changes are confirmed by the analysis of mean square roughness and power spectral density slopes as functions of the implantation dose. The position and half-width of peaks in histograms of phase AFM images confirmed the changes in surface composition.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - Surface modification of polyethylene by Ag+ and Au+ ion implantation observed by phase imaging atomic force microscopy
VL  - 206
IS  - 19-20
SP  - 4242
EP  - 4248
DO  - 10.1016/j.surfcoat.2012.04.032
ER  - 

@article{
author = "Nenadović, Miloš and Potočnik, Jelena and Ristic, M. and Štrbac, Svetlana and Rakočević, Zlatko Lj.",
year = "2012",
abstract = "High density polyethylene (HDPE) has been modified by Ag+ and Au+ ion implantation with the energy of 60 and 200 keV, respectively. The doses of implanted silver and gold ions were as follows: 1 x 10(15), 5 x 10(15) and 1 x 10(16) ions/cm(2). The surface topography was observed using atomic force microscopy (AFM), while the surface composition changes were detected using phase imaging AFM. Phase analysis of AFM images shows that both physical and chemical changes occur on the surface of HDPE and that these changes depend on the nature of implanted ions and on the implantation dose. Silver ion implantation causes a higher degree of chemical changes, while the implantation of gold ions causes a higher degree of physical changes. Breakpoints were observed for the implantation doses of 0.6 x 10(15) and 4.4 x 10(15) ions/cm(2) for silver and gold ions, respectively. Physical changes are confirmed by the analysis of mean square roughness and power spectral density slopes as functions of the implantation dose. The position and half-width of peaks in histograms of phase AFM images confirmed the changes in surface composition.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Surface modification of polyethylene by Ag+ and Au+ ion implantation observed by phase imaging atomic force microscopy",
volume = "206",
number = "19-20",
pages = "4242-4248",
doi = "10.1016/j.surfcoat.2012.04.032"
}

Nenadović, M., Potočnik, J., Ristic, M., Štrbac, S.,& Rakočević, Z. Lj.. (2012). Surface modification of polyethylene by Ag+ and Au+ ion implantation observed by phase imaging atomic force microscopy. in Surface and Coatings Technology
Elsevier., 206(19-20), 4242-4248.
https://doi.org/10.1016/j.surfcoat.2012.04.032

Nenadović M, Potočnik J, Ristic M, Štrbac S, Rakočević ZL. Surface modification of polyethylene by Ag+ and Au+ ion implantation observed by phase imaging atomic force microscopy. in Surface and Coatings Technology. 2012;206(19-20):4242-4248.
doi:10.1016/j.surfcoat.2012.04.032 .

Nenadović, Miloš, Potočnik, Jelena, Ristic, M., Štrbac, Svetlana, Rakočević, Zlatko Lj., "Surface modification of polyethylene by Ag+ and Au+ ion implantation observed by phase imaging atomic force microscopy" in Surface and Coatings Technology, 206, no. 19-20 (2012):4242-4248,
https://doi.org/10.1016/j.surfcoat.2012.04.032 . .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/750
AB  - In this work, the quantitative conditions for the lift height for imaging of the magnetic field using magnetic force microscopy (MFM) were optimized. A thin cobalt film deposited on a monocrystalline silicon (1 0 0) substrate with a thickness of 55 nm and a thin nickel film deposited on a glass with a thickness of 600 nm were used as samples. The topography of the surface was acquired by tapping mode atomic force microscopy (AFM), while MFM imaging was performed in the lift mode for various lift heights. It was determined that the sensitivity of the measurements was about 10% higher for images obtained at a scan angle of 90 degrees compared to a scan angle of 0 degrees. Therefore, the three-dimensional surface texture parameters, i.e., average roughness, skewness, kurtosis and the bearing ratio, were determined in dependence on the lift height for a scan angle of 90 degrees. The results of the analyses of the surface parameters showed that the influence of the substrate and its texture on the magnetic force image could be neglected for lift heights above 40 nm and that the upper lift height limit is 100 nm. It was determined that the optimal values of the lift heights were in the range from 60 to 80 nm, depending on the nature of the sample and on the type of the tip used.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Quantification of the lift height for magnetic force microscopy using 3D surface parameters
VL  - 256
IS  - 6
SP  - 1652
EP  - 1656
DO  - 10.1016/j.apsusc.2009.09.088
ER  - 

@article{
author = "Nenadović, Miloš and Štrbac, Svetlana and Rakočević, Zlatko Lj.",
year = "2010",
abstract = "In this work, the quantitative conditions for the lift height for imaging of the magnetic field using magnetic force microscopy (MFM) were optimized. A thin cobalt film deposited on a monocrystalline silicon (1 0 0) substrate with a thickness of 55 nm and a thin nickel film deposited on a glass with a thickness of 600 nm were used as samples. The topography of the surface was acquired by tapping mode atomic force microscopy (AFM), while MFM imaging was performed in the lift mode for various lift heights. It was determined that the sensitivity of the measurements was about 10% higher for images obtained at a scan angle of 90 degrees compared to a scan angle of 0 degrees. Therefore, the three-dimensional surface texture parameters, i.e., average roughness, skewness, kurtosis and the bearing ratio, were determined in dependence on the lift height for a scan angle of 90 degrees. The results of the analyses of the surface parameters showed that the influence of the substrate and its texture on the magnetic force image could be neglected for lift heights above 40 nm and that the upper lift height limit is 100 nm. It was determined that the optimal values of the lift heights were in the range from 60 to 80 nm, depending on the nature of the sample and on the type of the tip used.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Quantification of the lift height for magnetic force microscopy using 3D surface parameters",
volume = "256",
number = "6",
pages = "1652-1656",
doi = "10.1016/j.apsusc.2009.09.088"
}

Nenadović, M., Štrbac, S.,& Rakočević, Z. Lj.. (2010). Quantification of the lift height for magnetic force microscopy using 3D surface parameters. in Applied Surface Science
Elsevier., 256(6), 1652-1656.
https://doi.org/10.1016/j.apsusc.2009.09.088

Nenadović M, Štrbac S, Rakočević ZL. Quantification of the lift height for magnetic force microscopy using 3D surface parameters. in Applied Surface Science. 2010;256(6):1652-1656.
doi:10.1016/j.apsusc.2009.09.088 .

Nenadović, Miloš, Štrbac, Svetlana, Rakočević, Zlatko Lj., "Quantification of the lift height for magnetic force microscopy using 3D surface parameters" in Applied Surface Science, 256, no. 6 (2010):1652-1656,
https://doi.org/10.1016/j.apsusc.2009.09.088 . .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Nenadović, Miloš
AU  - Rajaković, Ljubinka V.
AU  - Rakočević, Zlatko Lj.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/739
AB  - High density polyethylene (HDPE) has been modified by Ag+ ion implantation with the energy of 60 keV. The total amount of implanted silver ions was 1, 5 and 12 x 10(15) ions/cm(2). The surface topography was observed by atomic forcemicroscopy (AFM), while the surface composition changes were detected using phase imaging AFM. Surface topography changes were studied in detail using 3D surface parameters analyses. The average roughness decreased for the implanted HDPE indicating the flattening of the surface. Phase AFM images indicated the homogenization of the polyethylene during ion implantation, while histogram analyses confirmed the change in surface composition.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Chemical surface composition of the polyethylene implanted by Ag+ ions studied by phase imaging atomic force microscopy
VL  - 256
IS  - 12
SP  - 3895
EP  - 3899
DO  - 10.1016/j.apsusc.2010.01.046
ER  - 

@article{
author = "Štrbac, Svetlana and Nenadović, Miloš and Rajaković, Ljubinka V. and Rakočević, Zlatko Lj.",
year = "2010",
abstract = "High density polyethylene (HDPE) has been modified by Ag+ ion implantation with the energy of 60 keV. The total amount of implanted silver ions was 1, 5 and 12 x 10(15) ions/cm(2). The surface topography was observed by atomic forcemicroscopy (AFM), while the surface composition changes were detected using phase imaging AFM. Surface topography changes were studied in detail using 3D surface parameters analyses. The average roughness decreased for the implanted HDPE indicating the flattening of the surface. Phase AFM images indicated the homogenization of the polyethylene during ion implantation, while histogram analyses confirmed the change in surface composition.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Chemical surface composition of the polyethylene implanted by Ag+ ions studied by phase imaging atomic force microscopy",
volume = "256",
number = "12",
pages = "3895-3899",
doi = "10.1016/j.apsusc.2010.01.046"
}

Štrbac, S., Nenadović, M., Rajaković, L. V.,& Rakočević, Z. Lj.. (2010). Chemical surface composition of the polyethylene implanted by Ag+ ions studied by phase imaging atomic force microscopy. in Applied Surface Science
Elsevier., 256(12), 3895-3899.
https://doi.org/10.1016/j.apsusc.2010.01.046

Štrbac S, Nenadović M, Rajaković LV, Rakočević ZL. Chemical surface composition of the polyethylene implanted by Ag+ ions studied by phase imaging atomic force microscopy. in Applied Surface Science. 2010;256(12):3895-3899.
doi:10.1016/j.apsusc.2010.01.046 .

Štrbac, Svetlana, Nenadović, Miloš, Rajaković, Ljubinka V., Rakočević, Zlatko Lj., "Chemical surface composition of the polyethylene implanted by Ag+ ions studied by phase imaging atomic force microscopy" in Applied Surface Science, 256, no. 12 (2010):3895-3899,
https://doi.org/10.1016/j.apsusc.2010.01.046 . .

TY  - CONF
AU  - Nenadović, Miloš
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
PY  - 2008
UR  - https://publications.aob.rs/archive.html
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4270
AB  - In this work, the optimizing conditions necessary for magnetic field gradient imaging using Atomic Force Microscopy (AFM) and Magnetic Force Microscopy (MFM) in a lift mode have been established. 55 nm thick Co thin film deposited on monocrystalline silicon substrate was used as a sample. The lift height dependence of various surface texture parameters: R-sk - the skewness, and R-ku - the kurtosis, have been determined. The results have shown that the influence of the substrate and its texture on the magnetic field gradient can be neglected for the lift height above 40 am, and that the tipper lift height limit corresponding to the height where magnetic field lines follow the shape of the field is 100 nm.
PB  - Belgrade : Astronomical Observatory
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Surface Texture Parameters in Optimizing Magnetic Force Images
IS  - 84
SP  - 197
EP  - 200
UR  - https://hdl.handle.net/21.15107/rcub_cer_4270
ER  - 

@conference{
author = "Nenadović, Miloš and Štrbac, Svetlana and Rakočević, Zlatko Lj.",
year = "2008",
abstract = "In this work, the optimizing conditions necessary for magnetic field gradient imaging using Atomic Force Microscopy (AFM) and Magnetic Force Microscopy (MFM) in a lift mode have been established. 55 nm thick Co thin film deposited on monocrystalline silicon substrate was used as a sample. The lift height dependence of various surface texture parameters: R-sk - the skewness, and R-ku - the kurtosis, have been determined. The results have shown that the influence of the substrate and its texture on the magnetic field gradient can be neglected for the lift height above 40 am, and that the tipper lift height limit corresponding to the height where magnetic field lines follow the shape of the field is 100 nm.",
publisher = "Belgrade : Astronomical Observatory",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Surface Texture Parameters in Optimizing Magnetic Force Images",
number = "84",
pages = "197-200",
url = "https://hdl.handle.net/21.15107/rcub_cer_4270"
}

Nenadović, M., Štrbac, S.,& Rakočević, Z. Lj.. (2008). Surface Texture Parameters in Optimizing Magnetic Force Images. in Publications of the Astronomical Observatory of Belgrade
Belgrade : Astronomical Observatory.(84), 197-200.
https://hdl.handle.net/21.15107/rcub_cer_4270

Nenadović M, Štrbac S, Rakočević ZL. Surface Texture Parameters in Optimizing Magnetic Force Images. in Publications of the Astronomical Observatory of Belgrade. 2008;(84):197-200.
https://hdl.handle.net/21.15107/rcub_cer_4270 .

Nenadović, Miloš, Štrbac, Svetlana, Rakočević, Zlatko Lj., "Surface Texture Parameters in Optimizing Magnetic Force Images" in Publications of the Astronomical Observatory of Belgrade, no. 84 (2008):197-200,
https://hdl.handle.net/21.15107/rcub_cer_4270 .