Bifunctional (Zn,Fe)3O4 nanoparticles: Tuning their efficiency for potential application in reagentless glucose biosensors and magnetic hyperthermia
Authorized Users Only
2019
Authors
Ognjanović, Miloš
Stanković, Dalibor

Ming, Y.
Zhang, H.
Jančar, Boštjan
Dojčinović, Biljana

Prijović, Ž.
Antić, Bratislav

Article (Published version)

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Show full item recordAbstract
In a new approach based on a two-step procedure, co-precipitation method followed by hydrothermal treatment in a microwave field, Zn-substituted Fe3O4 nanoparticles (ZnxFe3-xO4) were synthesized. Results of XRD, FT–IR and TEM analysis clearly demonstrate that nanoparticles were single phase, crystallizing in the spinel structure type (S.G. Fd3¯m) with crystallite size in the range of 2–20 nm, which strongly depends on Zn concentration. The produced nanoparticles were used for fabrication of modified carbon paste electrodes as a novel system for electrochemical non-enzymatic glucose detection. It was found that the increase of zinc concentration up to the value of x = 0.56 (Zn0.56Fe2.44O4) of as-prepared nanoparticles was followed with an increase of a performance of the modified carbon paste electrode toward glucose detection. Linear working range from 0.1 to 2 mM was obtained with detection limit of 0.03 mM, and with fast response time (<3 s). Proposed sensor was successfully appli...ed for the determination of glucose level in real samples with satisfactory recovery. The synthesized zinc-ferrite samples were also tested as potential heating agents in magnetic hyperthermia. The heating ability (SAR value) increases with x value, reaching maximum for x = 0.37. This is correlated with changes of particle size and magnetic characteristics which strongly depend on Zn concentration.
Keywords:
Carbon electrodes / Glucose sensor / Hyperthermia / MW hydrothermal synthesis / Structural characterizationSource:
Journal of Alloys and Compounds, 2019, 454-462Publisher:
- Elsevier Ltd
Projects:
- Strengthening of the MagBioVin Research and Innovation Team for Development of Novel Approaches for Tumour Therapy based on Nanostructured Materials (EU-621375)
- Ministry of Education, Science and Technological Development of the Republic of Serbia through the Eureka Project, E!9982
DOI: 10.1016/j.jallcom.2018.10.369
ISSN: 0925-8388