TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Vujković, Milica
AU  - Kovač, Janez
AU  - Vengust, Damjan
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8520
AB  - In the present study we investigated the interaction between 12-tungstophosphoric acid (WPA) and graphene oxide (GO) in their nanocomposite by utilizing the loading of WPA as an intrinsic parameter for interaction tuning. The Fourier-transform infrared spectroscopy, temperature-programmed desorption, X-ray photoelectron spectroscopy, zeta-potential measurements, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy and transmission electron microscopy methods revealed that ∼5–13 wt% of WPA represents critical loading that separates two distinct contributions to GO-WPA interaction. This was explained by the self-limiting nature of GO-WPA interaction, initially controlled by high dispersion of WPA on GO (up to 13 wt%), that is eventually overpowered by WPA-WPA interaction as loading increases. As a result, the WPA agglomerates are being formed because of which the hybrid character of the nanocomposite diminishes, i.e., the properties of independent components start to be manifested to greater extent. The obtained results provide an important framework for considering possible outcomes in other 2D-0D systems, whose interaction is relevant both from fundamental and applicative point of view. Thus, the GO/WPA nanocomposite illustrates how the interactions between the components can be used for tuning the properties of nanocomposite as a whole. © 2019 Elsevier Ltd
T2  - Carbon
T1  - Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite
VL  - 156
SP  - 166
EP  - 178
DO  - 10.1016/j.carbon.2019.09.072
ER  - 

@article{
author = "Jovanović, Zoran M. and Mravik, Željko and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Marković, Smilja and Vujković, Milica and Kovač, Janez and Vengust, Damjan and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka D.",
year = "2020",
abstract = "In the present study we investigated the interaction between 12-tungstophosphoric acid (WPA) and graphene oxide (GO) in their nanocomposite by utilizing the loading of WPA as an intrinsic parameter for interaction tuning. The Fourier-transform infrared spectroscopy, temperature-programmed desorption, X-ray photoelectron spectroscopy, zeta-potential measurements, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy and transmission electron microscopy methods revealed that ∼5–13 wt% of WPA represents critical loading that separates two distinct contributions to GO-WPA interaction. This was explained by the self-limiting nature of GO-WPA interaction, initially controlled by high dispersion of WPA on GO (up to 13 wt%), that is eventually overpowered by WPA-WPA interaction as loading increases. As a result, the WPA agglomerates are being formed because of which the hybrid character of the nanocomposite diminishes, i.e., the properties of independent components start to be manifested to greater extent. The obtained results provide an important framework for considering possible outcomes in other 2D-0D systems, whose interaction is relevant both from fundamental and applicative point of view. Thus, the GO/WPA nanocomposite illustrates how the interactions between the components can be used for tuning the properties of nanocomposite as a whole. © 2019 Elsevier Ltd",
journal = "Carbon",
title = "Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite",
volume = "156",
pages = "166-178",
doi = "10.1016/j.carbon.2019.09.072"
}

Jovanović, Z. M., Mravik, Ž., Bajuk-Bogdanović, D. V., Jovanović, S., Marković, S., Vujković, M., Kovač, J., Vengust, D., Uskoković-Marković, S.,& Holclajtner-Antunović, I. D.. (2020). Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite. in Carbon, 156, 166-178.
https://doi.org/10.1016/j.carbon.2019.09.072

Jovanović ZM, Mravik Ž, Bajuk-Bogdanović DV, Jovanović S, Marković S, Vujković M, Kovač J, Vengust D, Uskoković-Marković S, Holclajtner-Antunović ID. Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite. in Carbon. 2020;156:166-178.
doi:10.1016/j.carbon.2019.09.072 .

Jovanović, Zoran M., Mravik, Željko, Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Marković, Smilja, Vujković, Milica, Kovač, Janez, Vengust, Damjan, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka D., "Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite" in Carbon, 156 (2020):166-178,
https://doi.org/10.1016/j.carbon.2019.09.072 . .

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica V.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Jovanović, Zoran M.
AU  - Mravik, Željko
AU  - Krstić, Jugoslav B.
AU  - Uskoković-Marković, Snežana
AU  - Vujković, Milica
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8500
AB  - The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Journal of Solid State Electrochemistry
T1  - Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?
VL  - 23
IS  - 9
SP  - 2747
EP  - 2758
DO  - 10.1007/s10008-019-04369-4
ER  - 

@article{
author = "Bajuk-Bogdanović, Danica V. and Holclajtner-Antunović, Ivanka D. and Jovanović, Zoran M. and Mravik, Željko and Krstić, Jugoslav B. and Uskoković-Marković, Snežana and Vujković, Milica",
year = "2019",
abstract = "The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Journal of Solid State Electrochemistry",
title = "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?",
volume = "23",
number = "9",
pages = "2747-2758",
doi = "10.1007/s10008-019-04369-4"
}

Bajuk-Bogdanović, D. V., Holclajtner-Antunović, I. D., Jovanović, Z. M., Mravik, Ž., Krstić, J. B., Uskoković-Marković, S.,& Vujković, M.. (2019). Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry, 23(9), 2747-2758.
https://doi.org/10.1007/s10008-019-04369-4

Bajuk-Bogdanović DV, Holclajtner-Antunović ID, Jovanović ZM, Mravik Ž, Krstić JB, Uskoković-Marković S, Vujković M. Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry. 2019;23(9):2747-2758.
doi:10.1007/s10008-019-04369-4 .

Bajuk-Bogdanović, Danica V., Holclajtner-Antunović, Ivanka D., Jovanović, Zoran M., Mravik, Željko, Krstić, Jugoslav B., Uskoković-Marković, Snežana, Vujković, Milica, "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?" in Journal of Solid State Electrochemistry, 23, no. 9 (2019):2747-2758,
https://doi.org/10.1007/s10008-019-04369-4 . .

TY  - JOUR
AU  - Vasiljević-Nedić, Bojana
AU  - Obradović, Milena
AU  - Bajuk-Bogdanović, Danica V.
AU  - Milojević-Rakić, Maja
AU  - Jovanović, Zoran M.
AU  - Gavrilov, Nemanja M.
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S1001074218314682
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8217
AB  - Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application. © 2019
T2  - Journal of Environmental Sciences
T1  - In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal
VL  - 81
SP  - 136
EP  - 147
DO  - 10.1016/j.jes.2019.01.018
ER  - 

@article{
author = "Vasiljević-Nedić, Bojana and Obradović, Milena and Bajuk-Bogdanović, Danica V. and Milojević-Rakić, Maja and Jovanović, Zoran M. and Gavrilov, Nemanja M. and Holclajtner-Antunović, Ivanka D.",
year = "2019",
abstract = "Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application. © 2019",
journal = "Journal of Environmental Sciences",
title = "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal",
volume = "81",
pages = "136-147",
doi = "10.1016/j.jes.2019.01.018"
}

Vasiljević-Nedić, B., Obradović, M., Bajuk-Bogdanović, D. V., Milojević-Rakić, M., Jovanović, Z. M., Gavrilov, N. M.,& Holclajtner-Antunović, I. D.. (2019). In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences, 81, 136-147.
https://doi.org/10.1016/j.jes.2019.01.018

Vasiljević-Nedić B, Obradović M, Bajuk-Bogdanović DV, Milojević-Rakić M, Jovanović ZM, Gavrilov NM, Holclajtner-Antunović ID. In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences. 2019;81:136-147.
doi:10.1016/j.jes.2019.01.018 .

Vasiljević-Nedić, Bojana, Obradović, Milena, Bajuk-Bogdanović, Danica V., Milojević-Rakić, Maja, Jovanović, Zoran M., Gavrilov, Nemanja M., Holclajtner-Antunović, Ivanka D., "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal" in Journal of Environmental Sciences, 81 (2019):136-147,
https://doi.org/10.1016/j.jes.2019.01.018 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pavlović, Vladimir B.
AU  - Tošić, Dragana
AU  - Milenković, Marina
AU  - Todorović-Marković, Biljana
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7611
AB  - © 2018 Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.
T2  - Materials Chemistry and Physics
T1  - Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study
VL  - 213
SP  - 157
EP  - 167
DO  - 10.1016/j.matchemphys.2018.04.011
ER  - 

@article{
author = "Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica V. and Pavlović, Vladimir B. and Tošić, Dragana and Milenković, Marina and Todorović-Marković, Biljana",
year = "2018",
abstract = "© 2018 Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.",
journal = "Materials Chemistry and Physics",
title = "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study",
volume = "213",
pages = "157-167",
doi = "10.1016/j.matchemphys.2018.04.011"
}

Jovanović, S. P., Holclajtner-Antunović, I. D., Uskoković-Marković, S., Bajuk-Bogdanović, D. V., Pavlović, V. B., Tošić, D., Milenković, M.,& Todorović-Marković, B.. (2018). Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics, 213, 157-167.
https://doi.org/10.1016/j.matchemphys.2018.04.011

Jovanović SP, Holclajtner-Antunović ID, Uskoković-Marković S, Bajuk-Bogdanović DV, Pavlović VB, Tošić D, Milenković M, Todorović-Marković B. Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics. 2018;213:157-167.
doi:10.1016/j.matchemphys.2018.04.011 .

Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica V., Pavlović, Vladimir B., Tošić, Dragana, Milenković, Marina, Todorović-Marković, Biljana, "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study" in Materials Chemistry and Physics, 213 (2018):157-167,
https://doi.org/10.1016/j.matchemphys.2018.04.011 . .

TY  - CONF
AU  - Ćirić, Darko
AU  - Martinović, Tamara
AU  - Kravić-Stevović, Tamara K.
AU  - Volarević, Vladislav
AU  - Paunović, Verica G.
AU  - Marković, Zoran M.
AU  - Marković-Simović, Bojana
AU  - Misirkić-Marjanović, Maja
AU  - Todorović-Marković, Biljana
AU  - Bojić, Sanja
AU  - Vučićević, Ljubica
AU  - Jovanović, Svetlana P.
AU  - Arsenijević, Nebojša N.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Milosavljević, Momir
AU  - Dramićanin, Miroslav
AU  - Lukić, Miodrag L.
AU  - Trajković, Vladimir S.
AU  - Bumbaširević, Vladimir Ž.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8741
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - Ultrastructural Analysis of Large Graphene Quantum Dots Internalization in Hepatocytes
SP  - 272
EP  - 274
ER  - 

@conference{
author = "Ćirić, Darko and Martinović, Tamara and Kravić-Stevović, Tamara K. and Volarević, Vladislav and Paunović, Verica G. and Marković, Zoran M. and Marković-Simović, Bojana and Misirkić-Marjanović, Maja and Todorović-Marković, Biljana and Bojić, Sanja and Vučićević, Ljubica and Jovanović, Svetlana P. and Arsenijević, Nebojša N. and Holclajtner-Antunović, Ivanka D. and Milosavljević, Momir and Dramićanin, Miroslav and Lukić, Miodrag L. and Trajković, Vladimir S. and Bumbaširević, Vladimir Ž.",
year = "2018",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "Ultrastructural Analysis of Large Graphene Quantum Dots Internalization in Hepatocytes",
pages = "272-274"
}

Ćirić, D., Martinović, T., Kravić-Stevović, T. K., Volarević, V., Paunović, V. G., Marković, Z. M., Marković-Simović, B., Misirkić-Marjanović, M., Todorović-Marković, B., Bojić, S., Vučićević, L., Jovanović, S. P., Arsenijević, N. N., Holclajtner-Antunović, I. D., Milosavljević, M., Dramićanin, M., Lukić, M. L., Trajković, V. S.,& Bumbaširević, V. Ž.. (2018). Ultrastructural Analysis of Large Graphene Quantum Dots Internalization in Hepatocytes. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 272-274.

Ćirić D, Martinović T, Kravić-Stevović TK, Volarević V, Paunović VG, Marković ZM, Marković-Simović B, Misirkić-Marjanović M, Todorović-Marković B, Bojić S, Vučićević L, Jovanović SP, Arsenijević NN, Holclajtner-Antunović ID, Milosavljević M, Dramićanin M, Lukić ML, Trajković VS, Bumbaširević VŽ. Ultrastructural Analysis of Large Graphene Quantum Dots Internalization in Hepatocytes. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:272-274..

Ćirić, Darko, Martinović, Tamara, Kravić-Stevović, Tamara K., Volarević, Vladislav, Paunović, Verica G., Marković, Zoran M., Marković-Simović, Bojana, Misirkić-Marjanović, Maja, Todorović-Marković, Biljana, Bojić, Sanja, Vučićević, Ljubica, Jovanović, Svetlana P., Arsenijević, Nebojša N., Holclajtner-Antunović, Ivanka D., Milosavljević, Momir, Dramićanin, Miroslav, Lukić, Miodrag L., Trajković, Vladimir S., Bumbaširević, Vladimir Ž., "Ultrastructural Analysis of Large Graphene Quantum Dots Internalization in Hepatocytes" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):272-274.

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Kepić, Dejan P.
AU  - Budimir, Milica
AU  - Todorović-Marković, Biljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1420
AB  - Graphene as a new material is in the spotlight due to its extraordinary properties and wide range of potential applications. Chemical vapour deposition, as a method for graphene synthesis from gaseous hydrocarbon sources has great promises for large-scale graphene synthesis. However, for such grow high temperatures of 800-1000 degrees C are typically required. Here we demonstrate synthesis of single-layer and bi-layer graphene thin films of approximately 10,m in size by rapid thermal annealing process at low annealing temperature such as 600 degrees C. Synthesis was performed on copper foil from graphene quantum dots and fullerenol as solid carbon sources at different concentrations. Raman spectroscopy study has shown that the number of grown graphene layers depends on the carbon source concentration. The quality of formed graphene layers withal depends on the carbon source and its concentration, whereby graphene from graphene quantum dots had better quality. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Graphene quantum dots and fullerenol as new carbon sources for single-layer and bi-layer graphene synthesis by rapid thermal annealing method
VL  - 88
SP  - 114
EP  - 120
DO  - 10.1016/j.materresbull.2016.12.018
ER  - 

@article{
author = "Prekodravac, Jovana and Marković, Zoran M. and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Kepić, Dejan P. and Budimir, Milica and Todorović-Marković, Biljana",
year = "2017",
abstract = "Graphene as a new material is in the spotlight due to its extraordinary properties and wide range of potential applications. Chemical vapour deposition, as a method for graphene synthesis from gaseous hydrocarbon sources has great promises for large-scale graphene synthesis. However, for such grow high temperatures of 800-1000 degrees C are typically required. Here we demonstrate synthesis of single-layer and bi-layer graphene thin films of approximately 10,m in size by rapid thermal annealing process at low annealing temperature such as 600 degrees C. Synthesis was performed on copper foil from graphene quantum dots and fullerenol as solid carbon sources at different concentrations. Raman spectroscopy study has shown that the number of grown graphene layers depends on the carbon source concentration. The quality of formed graphene layers withal depends on the carbon source and its concentration, whereby graphene from graphene quantum dots had better quality. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Graphene quantum dots and fullerenol as new carbon sources for single-layer and bi-layer graphene synthesis by rapid thermal annealing method",
volume = "88",
pages = "114-120",
doi = "10.1016/j.materresbull.2016.12.018"
}

Prekodravac, J., Marković, Z. M., Jovanović, S. P., Holclajtner-Antunović, I. D., Kepić, D. P., Budimir, M.,& Todorović-Marković, B.. (2017). Graphene quantum dots and fullerenol as new carbon sources for single-layer and bi-layer graphene synthesis by rapid thermal annealing method. in Materials Research Bulletin, 88, 114-120.
https://doi.org/10.1016/j.materresbull.2016.12.018

Prekodravac J, Marković ZM, Jovanović SP, Holclajtner-Antunović ID, Kepić DP, Budimir M, Todorović-Marković B. Graphene quantum dots and fullerenol as new carbon sources for single-layer and bi-layer graphene synthesis by rapid thermal annealing method. in Materials Research Bulletin. 2017;88:114-120.
doi:10.1016/j.materresbull.2016.12.018 .

Prekodravac, Jovana, Marković, Zoran M., Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Kepić, Dejan P., Budimir, Milica, Todorović-Marković, Biljana, "Graphene quantum dots and fullerenol as new carbon sources for single-layer and bi-layer graphene synthesis by rapid thermal annealing method" in Materials Research Bulletin, 88 (2017):114-120,
https://doi.org/10.1016/j.materresbull.2016.12.018 . .

TY  - CONF
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica V.
AU  - Marković, Smilja
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Jovanović, Zoran M.
PY  - 2017
UR  - http://itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/1219
UR  - http://itn.sanu.ac.rs/opus4/files/1219/Mravik_16YRC2017.pdf
UR  - http://dais.sanu.ac.rs/123456789/15450
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7556
AB  - In recent years the nanocomposites of graphene oxide (GO) and different inorganic and organic compounds have shown great potential for charge storage applications. In present work we have investigated the influence of 12-tungstophosphoric acid (WPA) on surface chemistry of graphene oxide and thermal stability of nanocomposite. For this purpose nanocomposites with different mass ratios of GO and WPA were prepared. The thermal stability of nanocomposites was investigated by thermogravimetric and differential thermal analysis (TGA-DTA) while changes in surface chemistry of GO and structural properties of WPA were investigated by Fourier transform infrared spectroscopy (FTIR) and temperature programmed desorption (TPD) method. The TGA-DTA measurements of composites have shown that the major mass loss, due to carbon combustion, is shifted to higher temperatures (~500 °C vs. 380 °C of pure GO). Furthermore, when the amount of WPA is higher than 25 mass percent the nanocomposites start to act like individual components, which was also confirmed by FTIR analysis. The amount of surface oxygen groups, monitored by both TPD and FTIR methods, showed ˝V˝ shaped dependence from the quantity of WPA with minimum at about 12 mass percent of WPA. At the same time, the FTIR spectra revealed the structural changes of WPA, displayed as shifting and splitting of characteristic bands of Keggin anion structure.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia
T1  - Surface chemistry, thermal stability and structural properties of graphene oxide/12-tungstophosphoric acid nanocomposite
SP  - 48
EP  - 48
ER  - 

@conference{
editor = "Marković, Smilja",
author = "Mravik, Željko and Bajuk-Bogdanović, Danica V. and Marković, Smilja and Holclajtner-Antunović, Ivanka D. and Jovanović, Zoran M.",
year = "2017",
abstract = "In recent years the nanocomposites of graphene oxide (GO) and different inorganic and organic compounds have shown great potential for charge storage applications. In present work we have investigated the influence of 12-tungstophosphoric acid (WPA) on surface chemistry of graphene oxide and thermal stability of nanocomposite. For this purpose nanocomposites with different mass ratios of GO and WPA were prepared. The thermal stability of nanocomposites was investigated by thermogravimetric and differential thermal analysis (TGA-DTA) while changes in surface chemistry of GO and structural properties of WPA were investigated by Fourier transform infrared spectroscopy (FTIR) and temperature programmed desorption (TPD) method. The TGA-DTA measurements of composites have shown that the major mass loss, due to carbon combustion, is shifted to higher temperatures (~500 °C vs. 380 °C of pure GO). Furthermore, when the amount of WPA is higher than 25 mass percent the nanocomposites start to act like individual components, which was also confirmed by FTIR analysis. The amount of surface oxygen groups, monitored by both TPD and FTIR methods, showed ˝V˝ shaped dependence from the quantity of WPA with minimum at about 12 mass percent of WPA. At the same time, the FTIR spectra revealed the structural changes of WPA, displayed as shifting and splitting of characteristic bands of Keggin anion structure.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia",
title = "Surface chemistry, thermal stability and structural properties of graphene oxide/12-tungstophosphoric acid nanocomposite",
pages = "48-48"
}

Marković, S., Mravik, Ž., Bajuk-Bogdanović, D. V., Marković, S., Holclajtner-Antunović, I. D.,& Jovanović, Z. M.. (2017). Surface chemistry, thermal stability and structural properties of graphene oxide/12-tungstophosphoric acid nanocomposite. in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 48-48.

Marković S, Mravik Ž, Bajuk-Bogdanović DV, Marković S, Holclajtner-Antunović ID, Jovanović ZM. Surface chemistry, thermal stability and structural properties of graphene oxide/12-tungstophosphoric acid nanocomposite. in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia. 2017;:48-48..

Marković, Smilja, Mravik, Željko, Bajuk-Bogdanović, Danica V., Marković, Smilja, Holclajtner-Antunović, Ivanka D., Jovanović, Zoran M., "Surface chemistry, thermal stability and structural properties of graphene oxide/12-tungstophosphoric acid nanocomposite" in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia (2017):48-48.

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Mravik, Željko
AU  - Kovač, Janez
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Vujković, Milica
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1879
AB  - In the present study we have evaluated the contribution of particular oxygen functional groups in the charge storage properties of graphene oxide (GO). This was achieved by a gradual thermal reduction of GO in an inert atmosphere (up to 800 degrees C) and thorough examination of functional groups which remained after each de-functionalization step. After identification of functional groups, the character of additional cyclovoltammetric peak, less pronounced than the main redox quinone/hydroquinone pair, and overall charge storage properties of GO were discussed from the perspective of different thermal stability of its surface groups. The results indicated three-stage deoxidation process of GO, each comprising of specific surface chemistry, structural changes and electrochemical behavior. The low capacitance, similar to 50 F g(-1), at T LT = 300 degrees C was attributed to the presence of epoxy and carboxyl groups. The highest capacitance (120-130 F g(-1)) was observed in the case of GO reduced at 400 and 500 degrees C, which we attributed to positive effects of phenol and carbonyl/quinone groups, while at high temperatures (T GT = 600 degrees C, similar to 30 F g(-1)) the extensive desorption of functional groups and structural changes were emphasized as the main reasons for additional decrease of capacitance. Our results highlight the cases where the duality of interpretation of surface functional groups is likely to happen and indicate that not all functional groups play a positive role in charge storage behavior of graphene oxide. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - The role of surface chemistry in the charge storage properties of graphene oxide
VL  - 258
SP  - 1228
EP  - 1243
DO  - 10.1016/j.electacta.2017.11.178
ER  - 

@article{
author = "Jovanović, Zoran M. and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Mravik, Željko and Kovač, Janez and Holclajtner-Antunović, Ivanka D. and Vujković, Milica",
year = "2017",
abstract = "In the present study we have evaluated the contribution of particular oxygen functional groups in the charge storage properties of graphene oxide (GO). This was achieved by a gradual thermal reduction of GO in an inert atmosphere (up to 800 degrees C) and thorough examination of functional groups which remained after each de-functionalization step. After identification of functional groups, the character of additional cyclovoltammetric peak, less pronounced than the main redox quinone/hydroquinone pair, and overall charge storage properties of GO were discussed from the perspective of different thermal stability of its surface groups. The results indicated three-stage deoxidation process of GO, each comprising of specific surface chemistry, structural changes and electrochemical behavior. The low capacitance, similar to 50 F g(-1), at T LT = 300 degrees C was attributed to the presence of epoxy and carboxyl groups. The highest capacitance (120-130 F g(-1)) was observed in the case of GO reduced at 400 and 500 degrees C, which we attributed to positive effects of phenol and carbonyl/quinone groups, while at high temperatures (T GT = 600 degrees C, similar to 30 F g(-1)) the extensive desorption of functional groups and structural changes were emphasized as the main reasons for additional decrease of capacitance. Our results highlight the cases where the duality of interpretation of surface functional groups is likely to happen and indicate that not all functional groups play a positive role in charge storage behavior of graphene oxide. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "The role of surface chemistry in the charge storage properties of graphene oxide",
volume = "258",
pages = "1228-1243",
doi = "10.1016/j.electacta.2017.11.178"
}

Jovanović, Z. M., Bajuk-Bogdanović, D. V., Jovanović, S., Mravik, Ž., Kovač, J., Holclajtner-Antunović, I. D.,& Vujković, M.. (2017). The role of surface chemistry in the charge storage properties of graphene oxide. in Electrochimica Acta, 258, 1228-1243.
https://doi.org/10.1016/j.electacta.2017.11.178

Jovanović ZM, Bajuk-Bogdanović DV, Jovanović S, Mravik Ž, Kovač J, Holclajtner-Antunović ID, Vujković M. The role of surface chemistry in the charge storage properties of graphene oxide. in Electrochimica Acta. 2017;258:1228-1243.
doi:10.1016/j.electacta.2017.11.178 .

Jovanović, Zoran M., Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Mravik, Željko, Kovač, Janez, Holclajtner-Antunović, Ivanka D., Vujković, Milica, "The role of surface chemistry in the charge storage properties of graphene oxide" in Electrochimica Acta, 258 (2017):1228-1243,
https://doi.org/10.1016/j.electacta.2017.11.178 . .

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Mravik, Željko
AU  - Vujković, Milica
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1737
AB  - The influence of thermal treatment in an inert atmosphere on the charge storage properties of graphene oxide (GO)/12-tungstophosphoric acid (WPA) nanocomposite was examined. The transmission electron microscopy analysis revealed high dispersion of WPA on GO matrix, while the surface analysis showed thermal activation of structural changes of WPA and desorption of oxygen functional groups from GO and GO/WPA nanocomposite. Initial GO/WPA nanocomposite had approximately two times higher capacitance compared to initial GO. The thermal treatment of initial GO and GO/WPA to 500 degrees C induced twofold increase of capacitance of GO and 40% increase of GO/WPA, accompanied with significant increase of operating voltage compared to GO (for 300 mV). Above 500 degrees C, a decrease of capacitance of both GO and GO/WPA was observed. The results suggest that understanding of structural changes of components and their interaction is crucial for improvement of electrochemical properties of considered composite.
T2  - Electrochemistry Communications
T1  - Effect of thermal treatment on the charge storage properties of graphene oxide/12-tungstophosphoric acid nanocomposite
VL  - 83
SP  - 36
EP  - 40
DO  - 10.1016/j.elecom.2017.08.017
ER  - 

@article{
author = "Jovanović, Zoran M. and Holclajtner-Antunović, Ivanka D. and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Mravik, Željko and Vujković, Milica",
year = "2017",
abstract = "The influence of thermal treatment in an inert atmosphere on the charge storage properties of graphene oxide (GO)/12-tungstophosphoric acid (WPA) nanocomposite was examined. The transmission electron microscopy analysis revealed high dispersion of WPA on GO matrix, while the surface analysis showed thermal activation of structural changes of WPA and desorption of oxygen functional groups from GO and GO/WPA nanocomposite. Initial GO/WPA nanocomposite had approximately two times higher capacitance compared to initial GO. The thermal treatment of initial GO and GO/WPA to 500 degrees C induced twofold increase of capacitance of GO and 40% increase of GO/WPA, accompanied with significant increase of operating voltage compared to GO (for 300 mV). Above 500 degrees C, a decrease of capacitance of both GO and GO/WPA was observed. The results suggest that understanding of structural changes of components and their interaction is crucial for improvement of electrochemical properties of considered composite.",
journal = "Electrochemistry Communications",
title = "Effect of thermal treatment on the charge storage properties of graphene oxide/12-tungstophosphoric acid nanocomposite",
volume = "83",
pages = "36-40",
doi = "10.1016/j.elecom.2017.08.017"
}

Jovanović, Z. M., Holclajtner-Antunović, I. D., Bajuk-Bogdanović, D. V., Jovanović, S., Mravik, Ž.,& Vujković, M.. (2017). Effect of thermal treatment on the charge storage properties of graphene oxide/12-tungstophosphoric acid nanocomposite. in Electrochemistry Communications, 83, 36-40.
https://doi.org/10.1016/j.elecom.2017.08.017

Jovanović ZM, Holclajtner-Antunović ID, Bajuk-Bogdanović DV, Jovanović S, Mravik Ž, Vujković M. Effect of thermal treatment on the charge storage properties of graphene oxide/12-tungstophosphoric acid nanocomposite. in Electrochemistry Communications. 2017;83:36-40.
doi:10.1016/j.elecom.2017.08.017 .

Jovanović, Zoran M., Holclajtner-Antunović, Ivanka D., Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Mravik, Željko, Vujković, Milica, "Effect of thermal treatment on the charge storage properties of graphene oxide/12-tungstophosphoric acid nanocomposite" in Electrochemistry Communications, 83 (2017):36-40,
https://doi.org/10.1016/j.elecom.2017.08.017 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Kepić, Dejan P.
AU  - Matijasevic, D. M.
AU  - Pavlović, Vladimir B.
AU  - Jovanović, Svetlana P.
AU  - Stankovic, N. K.
AU  - Milivojević, Dušan
AU  - Špitalsky, Zdenko
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Niksic, M. P.
AU  - Todorović-Marković, Biljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1650
AB  - Curcumin and its derivates are well-known for their different biological activities including antibacterial. On the other hand there are controversial reports concerning the antibacterial potential of graphene and, in particular, graphene oxide. In this study we have reported for the first time the antibacterial activity of curcumin/graphene nanomesh hybrids under ambient light conditions. The graphene nanomesh was synthesized by electrochemical exfoliation of highly oriented pyrolytic graphite in 1 M solution of ammonium persulfate and further functionalized by curcumin. Identical values of minimum inhibitory concentration (1 mg mL(-1)) were determined for pure curcumin and curcumin/graphene nanomesh hybrids toward Staphylococcus aureus. All tested samples had more pronounced antibacterial activity against Gram positive bacteria, Staphylococcus aureus compared to Escherichia coli as a representative of Gram negative strains. The poor antibacterial potential of exfoliated graphene improves significantly by the functionalization with curcumin, which allows for its usage as a antibacterial coating.
T2  - RSC Advances
T1  - Ambient light induced antibacterial action of curcumin/graphene nanomesh hybrids
VL  - 7
IS  - 57
SP  - 36081
EP  - 36092
DO  - 10.1039/c7ra05027e
ER  - 

@article{
author = "Marković, Zoran M. and Kepić, Dejan P. and Matijasevic, D. M. and Pavlović, Vladimir B. and Jovanović, Svetlana P. and Stankovic, N. K. and Milivojević, Dušan and Špitalsky, Zdenko and Holclajtner-Antunović, Ivanka D. and Bajuk-Bogdanović, Danica V. and Niksic, M. P. and Todorović-Marković, Biljana",
year = "2017",
abstract = "Curcumin and its derivates are well-known for their different biological activities including antibacterial. On the other hand there are controversial reports concerning the antibacterial potential of graphene and, in particular, graphene oxide. In this study we have reported for the first time the antibacterial activity of curcumin/graphene nanomesh hybrids under ambient light conditions. The graphene nanomesh was synthesized by electrochemical exfoliation of highly oriented pyrolytic graphite in 1 M solution of ammonium persulfate and further functionalized by curcumin. Identical values of minimum inhibitory concentration (1 mg mL(-1)) were determined for pure curcumin and curcumin/graphene nanomesh hybrids toward Staphylococcus aureus. All tested samples had more pronounced antibacterial activity against Gram positive bacteria, Staphylococcus aureus compared to Escherichia coli as a representative of Gram negative strains. The poor antibacterial potential of exfoliated graphene improves significantly by the functionalization with curcumin, which allows for its usage as a antibacterial coating.",
journal = "RSC Advances",
title = "Ambient light induced antibacterial action of curcumin/graphene nanomesh hybrids",
volume = "7",
number = "57",
pages = "36081-36092",
doi = "10.1039/c7ra05027e"
}

Marković, Z. M., Kepić, D. P., Matijasevic, D. M., Pavlović, V. B., Jovanović, S. P., Stankovic, N. K., Milivojević, D., Špitalsky, Z., Holclajtner-Antunović, I. D., Bajuk-Bogdanović, D. V., Niksic, M. P.,& Todorović-Marković, B.. (2017). Ambient light induced antibacterial action of curcumin/graphene nanomesh hybrids. in RSC Advances, 7(57), 36081-36092.
https://doi.org/10.1039/c7ra05027e

Marković ZM, Kepić DP, Matijasevic DM, Pavlović VB, Jovanović SP, Stankovic NK, Milivojević D, Špitalsky Z, Holclajtner-Antunović ID, Bajuk-Bogdanović DV, Niksic MP, Todorović-Marković B. Ambient light induced antibacterial action of curcumin/graphene nanomesh hybrids. in RSC Advances. 2017;7(57):36081-36092.
doi:10.1039/c7ra05027e .

Marković, Zoran M., Kepić, Dejan P., Matijasevic, D. M., Pavlović, Vladimir B., Jovanović, Svetlana P., Stankovic, N. K., Milivojević, Dušan, Špitalsky, Zdenko, Holclajtner-Antunović, Ivanka D., Bajuk-Bogdanović, Danica V., Niksic, M. P., Todorović-Marković, Biljana, "Ambient light induced antibacterial action of curcumin/graphene nanomesh hybrids" in RSC Advances, 7, no. 57 (2017):36081-36092,
https://doi.org/10.1039/c7ra05027e . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Matijasevic, Danka M.
AU  - Pavlović, Vladimir B.
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Špitalsky, Zdenko
AU  - Mičušik, Matej
AU  - Dramićanin, Miroslav
AU  - Milivojević, Dušan
AU  - Niksic, Miomir P.
AU  - Todorović-Marković, Biljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1576
AB  - Electrochemically exfoliated graphene is functionalized graphene with potential application in biomedicine. Two most relevant biological features of this material are its electrical conductivity and excellent water dispersibility. In this study we have tried to establish the correlation between graphene structure and its antibacterial properties. The exfoliation process was performed in a two electrode-highly oriented pyrolytic graphite electrochemical cell. Solution of ammonium persulfate was used as an electrolyte. Exfoliated graphene sheets were dispersed in aqueous media and characterized by atomic force microscopy, scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, X photoelectron spectroscopy, X-ray diffraction, electron paramagnetic resonance, zeta potential, contact angle measurements and surface energy. Antibacterial assays have shown lack of the significant antibacterial activity. Major effect on bacteria was slight change of bacteria morphology. Membrane remained intact despite significant change of chemical content of membrane components. (C) 2017 Elsevier Inc. All rights reserved.
T2  - Journal of Colloid and Interface Science
T1  - Antibacterial potential of electrochemically exfoliated graphene sheets
VL  - 500
SP  - 30
EP  - 43
DO  - 10.1016/j.jcis.2017.03.110
ER  - 

@article{
author = "Marković, Zoran M. and Matijasevic, Danka M. and Pavlović, Vladimir B. and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Špitalsky, Zdenko and Mičušik, Matej and Dramićanin, Miroslav and Milivojević, Dušan and Niksic, Miomir P. and Todorović-Marković, Biljana",
year = "2017",
abstract = "Electrochemically exfoliated graphene is functionalized graphene with potential application in biomedicine. Two most relevant biological features of this material are its electrical conductivity and excellent water dispersibility. In this study we have tried to establish the correlation between graphene structure and its antibacterial properties. The exfoliation process was performed in a two electrode-highly oriented pyrolytic graphite electrochemical cell. Solution of ammonium persulfate was used as an electrolyte. Exfoliated graphene sheets were dispersed in aqueous media and characterized by atomic force microscopy, scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, X photoelectron spectroscopy, X-ray diffraction, electron paramagnetic resonance, zeta potential, contact angle measurements and surface energy. Antibacterial assays have shown lack of the significant antibacterial activity. Major effect on bacteria was slight change of bacteria morphology. Membrane remained intact despite significant change of chemical content of membrane components. (C) 2017 Elsevier Inc. All rights reserved.",
journal = "Journal of Colloid and Interface Science",
title = "Antibacterial potential of electrochemically exfoliated graphene sheets",
volume = "500",
pages = "30-43",
doi = "10.1016/j.jcis.2017.03.110"
}

Marković, Z. M., Matijasevic, D. M., Pavlović, V. B., Jovanović, S. P., Holclajtner-Antunović, I. D., Špitalsky, Z., Mičušik, M., Dramićanin, M., Milivojević, D., Niksic, M. P.,& Todorović-Marković, B.. (2017). Antibacterial potential of electrochemically exfoliated graphene sheets. in Journal of Colloid and Interface Science, 500, 30-43.
https://doi.org/10.1016/j.jcis.2017.03.110

Marković ZM, Matijasevic DM, Pavlović VB, Jovanović SP, Holclajtner-Antunović ID, Špitalsky Z, Mičušik M, Dramićanin M, Milivojević D, Niksic MP, Todorović-Marković B. Antibacterial potential of electrochemically exfoliated graphene sheets. in Journal of Colloid and Interface Science. 2017;500:30-43.
doi:10.1016/j.jcis.2017.03.110 .

Marković, Zoran M., Matijasevic, Danka M., Pavlović, Vladimir B., Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Špitalsky, Zdenko, Mičušik, Matej, Dramićanin, Miroslav, Milivojević, Dušan, Niksic, Miomir P., Todorović-Marković, Biljana, "Antibacterial potential of electrochemically exfoliated graphene sheets" in Journal of Colloid and Interface Science, 500 (2017):30-43,
https://doi.org/10.1016/j.jcis.2017.03.110 . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Vidoeski, Bojan
AU  - Jovanović, Svetlana P.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Budimir, Milica
AU  - Marković, Zoran M.
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1274
AB  - A novel electrochemically exfoliated graphene-molybdophosphoric acid nanohybride (EG-MoPA) was prepared via a simple method. Both scanning electron (SEM) and atomic force microscopy (AFM) results show that MoPA clusters are attached to the surfaces of graphene sheets. By changing the mass ratio of EG-MoPA, the morphology of nanohybrid itself can be significantly modulated, from mostly flat graphene like structure at low amount of MoPA to very uneven, wavy surfaces when MoPA is present in higher concentration. The Raman and Fourier transform infra red (FTIR) spectra in conjunction with electrochemical results indicate that strong interaction exists between the components of nanohybride based on charge transfer and electrostatic interaction of graphene sheets and MoPA. The electrochemical performances are improved by synergetic effect of reversible redox properties of MoPA and the double layer capacitance of a high-surface area of the obtained nanohybrides. The higher current capability of EG was achieved by anchoring the small MoPA concentration on the graphene support. The strong bonding of EG with the MoPA prevents acid to dissolve in the electrolyte upon cycling, enabling the stable capacitance behaviour of the low-doped EG sample. The capacitance for the EG doped with the high amount of MoPA was found to be much larger than for EG. However, the obtained capacitance decreases at the beginning of cycling due to the dissolution of excessive amount of surface MoPA, weakly bonded to the graphene support. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Electrochimica Acta
T1  - Synthesis and Characterization of Electrochemically Exfoliated Graphene-Molybdophosphate Hybrid Materials for Charge Storage Devices
VL  - 217
SP  - 34
EP  - 46
DO  - 10.1016/j.electacta.2016.09.067
ER  - 

@article{
author = "Vujković, Milica and Vidoeski, Bojan and Jovanović, Svetlana P. and Bajuk-Bogdanović, Danica V. and Budimir, Milica and Marković, Zoran M. and Pavlović, Vladimir B. and Todorović-Marković, Biljana and Holclajtner-Antunović, Ivanka D.",
year = "2016",
abstract = "A novel electrochemically exfoliated graphene-molybdophosphoric acid nanohybride (EG-MoPA) was prepared via a simple method. Both scanning electron (SEM) and atomic force microscopy (AFM) results show that MoPA clusters are attached to the surfaces of graphene sheets. By changing the mass ratio of EG-MoPA, the morphology of nanohybrid itself can be significantly modulated, from mostly flat graphene like structure at low amount of MoPA to very uneven, wavy surfaces when MoPA is present in higher concentration. The Raman and Fourier transform infra red (FTIR) spectra in conjunction with electrochemical results indicate that strong interaction exists between the components of nanohybride based on charge transfer and electrostatic interaction of graphene sheets and MoPA. The electrochemical performances are improved by synergetic effect of reversible redox properties of MoPA and the double layer capacitance of a high-surface area of the obtained nanohybrides. The higher current capability of EG was achieved by anchoring the small MoPA concentration on the graphene support. The strong bonding of EG with the MoPA prevents acid to dissolve in the electrolyte upon cycling, enabling the stable capacitance behaviour of the low-doped EG sample. The capacitance for the EG doped with the high amount of MoPA was found to be much larger than for EG. However, the obtained capacitance decreases at the beginning of cycling due to the dissolution of excessive amount of surface MoPA, weakly bonded to the graphene support. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Electrochimica Acta",
title = "Synthesis and Characterization of Electrochemically Exfoliated Graphene-Molybdophosphate Hybrid Materials for Charge Storage Devices",
volume = "217",
pages = "34-46",
doi = "10.1016/j.electacta.2016.09.067"
}

Vujković, M., Vidoeski, B., Jovanović, S. P., Bajuk-Bogdanović, D. V., Budimir, M., Marković, Z. M., Pavlović, V. B., Todorović-Marković, B.,& Holclajtner-Antunović, I. D.. (2016). Synthesis and Characterization of Electrochemically Exfoliated Graphene-Molybdophosphate Hybrid Materials for Charge Storage Devices. in Electrochimica Acta, 217, 34-46.
https://doi.org/10.1016/j.electacta.2016.09.067

Vujković M, Vidoeski B, Jovanović SP, Bajuk-Bogdanović DV, Budimir M, Marković ZM, Pavlović VB, Todorović-Marković B, Holclajtner-Antunović ID. Synthesis and Characterization of Electrochemically Exfoliated Graphene-Molybdophosphate Hybrid Materials for Charge Storage Devices. in Electrochimica Acta. 2016;217:34-46.
doi:10.1016/j.electacta.2016.09.067 .

Vujković, Milica, Vidoeski, Bojan, Jovanović, Svetlana P., Bajuk-Bogdanović, Danica V., Budimir, Milica, Marković, Zoran M., Pavlović, Vladimir B., Todorović-Marković, Biljana, Holclajtner-Antunović, Ivanka D., "Synthesis and Characterization of Electrochemically Exfoliated Graphene-Molybdophosphate Hybrid Materials for Charge Storage Devices" in Electrochimica Acta, 217 (2016):34-46,
https://doi.org/10.1016/j.electacta.2016.09.067 . .

TY  - JOUR
AU  - Vidoeski, Bojan
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Budimir, Milica
AU  - Marković, Zoran M.
AU  - Todorović-Marković, Biljana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1219
AB  - Heteropoly acids (HPAs) have found wide applications, such as in catalysis, energy conversion and storage, analytical chemistry, clinical medicine, materials science and others, but their use is limited due to their low surface area and high solubility in water. One of the possible ways to overcome these obstacles is to use height specific surface area supports for HPAs, such as carbon nanomaterials. Raman spectroscopy was applied for a studying the interaction between HPAs and highly ordered pyrolytic graphite (HOPG) as a model of a support. HOPG was exposed to two different HPAs: 12-tungsto-phosphoric acid and 12-molybodphosphoric acid, at different concentrations. It was noticed that 12-molybodphosphoric acid had stronger effects on the HOPG structure causing a weak doping and an increase of structural disorder. It was supposed that HOPG interacts with especially external oxygen atoms of 12-molybodphosphoric acid. Atomic force microscopy showed that the surface roughness of HOPG treated with 12-molybodphosphoric acid increases with increasing acid concentration, while in the case of HOPG exposed to 12-tungsto-phosphoric acid, the surface roughness concentration independent. The growth trend in the measured surface roughness (RMS) was in the agreement with the changes in the intensity ratio I-D/I-G obtained from the Raman spectra of the HOPG samples treated with 12-molybdophosphoric acid.
T2  - Journal of the Serbian Chemical Society
T1  - Raman study of the interactions between highly ordered pyrolytic graphite (HOPG) and polyoxometalates: The effects of acid concentration
VL  - 81
IS  - 7
SP  - 777
EP  - 787
DO  - 10.2298/JSC160301055V
ER  - 

@article{
author = "Vidoeski, Bojan and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Bajuk-Bogdanović, Danica V. and Budimir, Milica and Marković, Zoran M. and Todorović-Marković, Biljana",
year = "2016",
abstract = "Heteropoly acids (HPAs) have found wide applications, such as in catalysis, energy conversion and storage, analytical chemistry, clinical medicine, materials science and others, but their use is limited due to their low surface area and high solubility in water. One of the possible ways to overcome these obstacles is to use height specific surface area supports for HPAs, such as carbon nanomaterials. Raman spectroscopy was applied for a studying the interaction between HPAs and highly ordered pyrolytic graphite (HOPG) as a model of a support. HOPG was exposed to two different HPAs: 12-tungsto-phosphoric acid and 12-molybodphosphoric acid, at different concentrations. It was noticed that 12-molybodphosphoric acid had stronger effects on the HOPG structure causing a weak doping and an increase of structural disorder. It was supposed that HOPG interacts with especially external oxygen atoms of 12-molybodphosphoric acid. Atomic force microscopy showed that the surface roughness of HOPG treated with 12-molybodphosphoric acid increases with increasing acid concentration, while in the case of HOPG exposed to 12-tungsto-phosphoric acid, the surface roughness concentration independent. The growth trend in the measured surface roughness (RMS) was in the agreement with the changes in the intensity ratio I-D/I-G obtained from the Raman spectra of the HOPG samples treated with 12-molybdophosphoric acid.",
journal = "Journal of the Serbian Chemical Society",
title = "Raman study of the interactions between highly ordered pyrolytic graphite (HOPG) and polyoxometalates: The effects of acid concentration",
volume = "81",
number = "7",
pages = "777-787",
doi = "10.2298/JSC160301055V"
}

Vidoeski, B., Jovanović, S. P., Holclajtner-Antunović, I. D., Bajuk-Bogdanović, D. V., Budimir, M., Marković, Z. M.,& Todorović-Marković, B.. (2016). Raman study of the interactions between highly ordered pyrolytic graphite (HOPG) and polyoxometalates: The effects of acid concentration. in Journal of the Serbian Chemical Society, 81(7), 777-787.
https://doi.org/10.2298/JSC160301055V

Vidoeski B, Jovanović SP, Holclajtner-Antunović ID, Bajuk-Bogdanović DV, Budimir M, Marković ZM, Todorović-Marković B. Raman study of the interactions between highly ordered pyrolytic graphite (HOPG) and polyoxometalates: The effects of acid concentration. in Journal of the Serbian Chemical Society. 2016;81(7):777-787.
doi:10.2298/JSC160301055V .

Vidoeski, Bojan, Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Bajuk-Bogdanović, Danica V., Budimir, Milica, Marković, Zoran M., Todorović-Marković, Biljana, "Raman study of the interactions between highly ordered pyrolytic graphite (HOPG) and polyoxometalates: The effects of acid concentration" in Journal of the Serbian Chemical Society, 81, no. 7 (2016):777-787,
https://doi.org/10.2298/JSC160301055V . .

TY  - JOUR
AU  - Damjanovic, L. J.
AU  - Mioč, Ubavka B.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Cerovic, N.
AU  - Maric-Stojanovic, M.
AU  - Andrić, Velibor
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1177
AB  - Medieval pottery from excavations at Novo Brdo, Serbia, an important mining and trading centre during the 14th and 15th centuries, was investigated by a combination of optical microscopy, inductively coupled plasma - optical emission spectrometry, Fourier transform infrared, micro-Raman and energy-dispersive X-ray fluorescence spectroscopy and X-ray powder diffraction methods in order to determine its composition and firing temperature. The samples investigated were made of medium- to coarse-grained, non-calcareous clay, by a relatively well-controlled firing procedure in an oxidizing atmosphere. The firing temperature was estimated to be 850-950 degrees C. The similarity between the chemical composition of the investigated pottery and the local raw clay, combined with the outward appearance and the archaeological findings, indicate domestic production. The pottery is covered with the transparent lead-rich glaze. Iron and copper were used as colourants.
T2  - Archaeometry
T1  - Archaeometric Investigation of Medieval Pottery from Excavations At Novo Brdo, Serbia
VL  - 58
IS  - 3
SP  - 380
EP  - 400
DO  - 10.1111/arcm.12185
ER  - 

@article{
author = "Damjanovic, L. J. and Mioč, Ubavka B. and Bajuk-Bogdanović, Danica V. and Cerovic, N. and Maric-Stojanovic, M. and Andrić, Velibor and Holclajtner-Antunović, Ivanka D.",
year = "2016",
abstract = "Medieval pottery from excavations at Novo Brdo, Serbia, an important mining and trading centre during the 14th and 15th centuries, was investigated by a combination of optical microscopy, inductively coupled plasma - optical emission spectrometry, Fourier transform infrared, micro-Raman and energy-dispersive X-ray fluorescence spectroscopy and X-ray powder diffraction methods in order to determine its composition and firing temperature. The samples investigated were made of medium- to coarse-grained, non-calcareous clay, by a relatively well-controlled firing procedure in an oxidizing atmosphere. The firing temperature was estimated to be 850-950 degrees C. The similarity between the chemical composition of the investigated pottery and the local raw clay, combined with the outward appearance and the archaeological findings, indicate domestic production. The pottery is covered with the transparent lead-rich glaze. Iron and copper were used as colourants.",
journal = "Archaeometry",
title = "Archaeometric Investigation of Medieval Pottery from Excavations At Novo Brdo, Serbia",
volume = "58",
number = "3",
pages = "380-400",
doi = "10.1111/arcm.12185"
}

Damjanovic, L. J., Mioč, U. B., Bajuk-Bogdanović, D. V., Cerovic, N., Maric-Stojanovic, M., Andrić, V.,& Holclajtner-Antunović, I. D.. (2016). Archaeometric Investigation of Medieval Pottery from Excavations At Novo Brdo, Serbia. in Archaeometry, 58(3), 380-400.
https://doi.org/10.1111/arcm.12185

Damjanovic LJ, Mioč UB, Bajuk-Bogdanović DV, Cerovic N, Maric-Stojanovic M, Andrić V, Holclajtner-Antunović ID. Archaeometric Investigation of Medieval Pottery from Excavations At Novo Brdo, Serbia. in Archaeometry. 2016;58(3):380-400.
doi:10.1111/arcm.12185 .

Damjanovic, L. J., Mioč, Ubavka B., Bajuk-Bogdanović, Danica V., Cerovic, N., Maric-Stojanovic, M., Andrić, Velibor, Holclajtner-Antunović, Ivanka D., "Archaeometric Investigation of Medieval Pottery from Excavations At Novo Brdo, Serbia" in Archaeometry, 58, no. 3 (2016):380-400,
https://doi.org/10.1111/arcm.12185 . .

TY  - JOUR
AU  - Tošić, Dragana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Prekodravac, Jovana
AU  - Budimir, Milica
AU  - Kepić, Dejan P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1157
AB  - In this paper, we present a novel method for graphene nanoribbons formation using nickel nanowires as templates. Modification of electrochemical procedure for nickel nanowires synthesis was introduced by implementing graphene quantum dots as a carbon source. Thus, nickel nanowires with graphene quantum dots were prepared. These wires were exposed to rapid thermal annealing at high temperatures (500 degrees C, 700 degrees C and 800 degrees C). During this process carbon atoms dissolve in metal and precipitate to the nickel surface forming nickel-carbon nanowires. Atomic force microscopy, scanning electron microscopy and Raman spectroscopy were characterization methods used for analysis of changes in nickel-carbon nanowires properties depending on the different annealing temperatures. After etching nickel with nitric acid, graphene nanoribbons with average diameters of 32 nm and average lengths of 4 mu m were obtained. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Synthetic Metals
T1  - Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation
VL  - 218
SP  - 43
EP  - 49
DO  - 10.1016/j.synthmet.2016.04.016
ER  - 

@article{
author = "Tošić, Dragana and Marković, Zoran M. and Jovanović, Svetlana P. and Prekodravac, Jovana and Budimir, Milica and Kepić, Dejan P. and Holclajtner-Antunović, Ivanka D. and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2016",
abstract = "In this paper, we present a novel method for graphene nanoribbons formation using nickel nanowires as templates. Modification of electrochemical procedure for nickel nanowires synthesis was introduced by implementing graphene quantum dots as a carbon source. Thus, nickel nanowires with graphene quantum dots were prepared. These wires were exposed to rapid thermal annealing at high temperatures (500 degrees C, 700 degrees C and 800 degrees C). During this process carbon atoms dissolve in metal and precipitate to the nickel surface forming nickel-carbon nanowires. Atomic force microscopy, scanning electron microscopy and Raman spectroscopy were characterization methods used for analysis of changes in nickel-carbon nanowires properties depending on the different annealing temperatures. After etching nickel with nitric acid, graphene nanoribbons with average diameters of 32 nm and average lengths of 4 mu m were obtained. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Synthetic Metals",
title = "Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation",
volume = "218",
pages = "43-49",
doi = "10.1016/j.synthmet.2016.04.016"
}

Tošić, D., Marković, Z. M., Jovanović, S. P., Prekodravac, J., Budimir, M., Kepić, D. P., Holclajtner-Antunović, I. D., Dramićanin, M.,& Todorović-Marković, B.. (2016). Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation. in Synthetic Metals, 218, 43-49.
https://doi.org/10.1016/j.synthmet.2016.04.016

Tošić D, Marković ZM, Jovanović SP, Prekodravac J, Budimir M, Kepić DP, Holclajtner-Antunović ID, Dramićanin M, Todorović-Marković B. Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation. in Synthetic Metals. 2016;218:43-49.
doi:10.1016/j.synthmet.2016.04.016 .

Tošić, Dragana, Marković, Zoran M., Jovanović, Svetlana P., Prekodravac, Jovana, Budimir, Milica, Kepić, Dejan P., Holclajtner-Antunović, Ivanka D., Dramićanin, Miroslav, Todorović-Marković, Biljana, "Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation" in Synthetic Metals, 218 (2016):43-49,
https://doi.org/10.1016/j.synthmet.2016.04.016 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Budimir, Milica
AU  - Kepić, Dejan P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
AU  - Spasojević, Vojislav
AU  - Peruško, Davor
AU  - Špitalsky, Zdenko
AU  - Mičušik, Matej
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1043
AB  - The electrochemical exfoliation of graphite to give one-atom-thick graphene with desirable properties is a green, cost-effective method for high-yield graphene production. This paper presents the results of electrochemical exfoliation of two different graphite precursors under an applied direct current voltage of +12 V. The used characterization techniques (elemental analysis, Fourier transform infrared spectroscopy, X-ray diffraction, X-photoelectron spectroscopy, Raman spectroscopy, field emission scanning electron microscopy and atomic force microscopy) showed that the exfoliated powder is highly functionalized with a low carbon/oxygen content that is similar to graphene oxide. The exfoliated graphene sheets dispersed in N,N-dimethylformamide were deposited on ano-discs by vacuum filtration and transferred to glass ceramic substrates. The thermal annealing of the as-deposited films at 600 degrees C for 30 minutes resulted in an increase in the carbon/oxygen ratio by more than 3 fold and a decrease in the sheet resistance by 25%. The lowest values for the sheet resistance of the annealed graphene thin films were in the range of 0.32 +/- 0.04 to 0.84 +/- 0.1 kohm sq(-1) depending on the graphite source that was used.
T2  - RSC Advances
T1  - Semi-transparent, conductive thin films of electrochemical exfoliated graphene
VL  - 6
IS  - 45
SP  - 39275
EP  - 39283
DO  - 10.1039/c6ra04250c
ER  - 

@article{
author = "Marković, Zoran M. and Budimir, Milica and Kepić, Dejan P. and Holclajtner-Antunović, Ivanka D. and Marinović-Cincović, Milena and Dramićanin, Miroslav and Spasojević, Vojislav and Peruško, Davor and Špitalsky, Zdenko and Mičušik, Matej and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2016",
abstract = "The electrochemical exfoliation of graphite to give one-atom-thick graphene with desirable properties is a green, cost-effective method for high-yield graphene production. This paper presents the results of electrochemical exfoliation of two different graphite precursors under an applied direct current voltage of +12 V. The used characterization techniques (elemental analysis, Fourier transform infrared spectroscopy, X-ray diffraction, X-photoelectron spectroscopy, Raman spectroscopy, field emission scanning electron microscopy and atomic force microscopy) showed that the exfoliated powder is highly functionalized with a low carbon/oxygen content that is similar to graphene oxide. The exfoliated graphene sheets dispersed in N,N-dimethylformamide were deposited on ano-discs by vacuum filtration and transferred to glass ceramic substrates. The thermal annealing of the as-deposited films at 600 degrees C for 30 minutes resulted in an increase in the carbon/oxygen ratio by more than 3 fold and a decrease in the sheet resistance by 25%. The lowest values for the sheet resistance of the annealed graphene thin films were in the range of 0.32 +/- 0.04 to 0.84 +/- 0.1 kohm sq(-1) depending on the graphite source that was used.",
journal = "RSC Advances",
title = "Semi-transparent, conductive thin films of electrochemical exfoliated graphene",
volume = "6",
number = "45",
pages = "39275-39283",
doi = "10.1039/c6ra04250c"
}

Marković, Z. M., Budimir, M., Kepić, D. P., Holclajtner-Antunović, I. D., Marinović-Cincović, M., Dramićanin, M., Spasojević, V., Peruško, D., Špitalsky, Z., Mičušik, M., Pavlović, V. B.,& Todorović-Marković, B.. (2016). Semi-transparent, conductive thin films of electrochemical exfoliated graphene. in RSC Advances, 6(45), 39275-39283.
https://doi.org/10.1039/c6ra04250c

Marković ZM, Budimir M, Kepić DP, Holclajtner-Antunović ID, Marinović-Cincović M, Dramićanin M, Spasojević V, Peruško D, Špitalsky Z, Mičušik M, Pavlović VB, Todorović-Marković B. Semi-transparent, conductive thin films of electrochemical exfoliated graphene. in RSC Advances. 2016;6(45):39275-39283.
doi:10.1039/c6ra04250c .

Marković, Zoran M., Budimir, Milica, Kepić, Dejan P., Holclajtner-Antunović, Ivanka D., Marinović-Cincović, Milena, Dramićanin, Miroslav, Spasojević, Vojislav, Peruško, Davor, Špitalsky, Zdenko, Mičušik, Matej, Pavlović, Vladimir B., Todorović-Marković, Biljana, "Semi-transparent, conductive thin films of electrochemical exfoliated graphene" in RSC Advances, 6, no. 45 (2016):39275-39283,
https://doi.org/10.1039/c6ra04250c . .

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/903
AB  - In this work, we present Raman spectroscopy study of graphene thin films obtained by rapid thermal annealing in vacuum. As a carbon source, we used spectroscopic graphite electrodes cut into small pieces on top of which we deposited copper/nickel thin films. Samples were then annealed at different annealing temperatures (600, 700, 800 and 900 degrees C) for 30 min. Raman spectroscopy study showed that annealing at lower annealing temperatures (600 and 700 degrees C) leads to formation of single layer graphene thin films with relatively high level of defects. Annealing at higher annealing temperatures (800 and 900 degrees C), on the other hand, resulted in formation of homogenous multilayer graphene thin films. From Raman spectra, we also concluded that samples annealed at higher annealing temperatures had lower level of defects compared to the samples annealed at lower annealing temperatures.
PB  - Springer
T2  - Optical and Quantum Electronics
T1  - Raman spectroscopy study of graphene thin films synthesized from solid precursor
VL  - 48
IS  - 2
DO  - 10.1007/s11082-016-0385-5
ER  - 

@article{
author = "Prekodravac, Jovana and Marković, Zoran M. and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2016",
abstract = "In this work, we present Raman spectroscopy study of graphene thin films obtained by rapid thermal annealing in vacuum. As a carbon source, we used spectroscopic graphite electrodes cut into small pieces on top of which we deposited copper/nickel thin films. Samples were then annealed at different annealing temperatures (600, 700, 800 and 900 degrees C) for 30 min. Raman spectroscopy study showed that annealing at lower annealing temperatures (600 and 700 degrees C) leads to formation of single layer graphene thin films with relatively high level of defects. Annealing at higher annealing temperatures (800 and 900 degrees C), on the other hand, resulted in formation of homogenous multilayer graphene thin films. From Raman spectra, we also concluded that samples annealed at higher annealing temperatures had lower level of defects compared to the samples annealed at lower annealing temperatures.",
publisher = "Springer",
journal = "Optical and Quantum Electronics",
title = "Raman spectroscopy study of graphene thin films synthesized from solid precursor",
volume = "48",
number = "2",
doi = "10.1007/s11082-016-0385-5"
}

Prekodravac, J., Marković, Z. M., Jovanović, S. P., Holclajtner-Antunović, I. D., Pavlović, V. B.,& Todorović-Marković, B.. (2016). Raman spectroscopy study of graphene thin films synthesized from solid precursor. in Optical and Quantum Electronics
Springer., 48(2).
https://doi.org/10.1007/s11082-016-0385-5

Prekodravac J, Marković ZM, Jovanović SP, Holclajtner-Antunović ID, Pavlović VB, Todorović-Marković B. Raman spectroscopy study of graphene thin films synthesized from solid precursor. in Optical and Quantum Electronics. 2016;48(2).
doi:10.1007/s11082-016-0385-5 .

Prekodravac, Jovana, Marković, Zoran M., Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Pavlović, Vladimir B., Todorović-Marković, Biljana, "Raman spectroscopy study of graphene thin films synthesized from solid precursor" in Optical and Quantum Electronics, 48, no. 2 (2016),
https://doi.org/10.1007/s11082-016-0385-5 . .

TY  - JOUR
AU  - Stojmenović, Marija
AU  - Zunic, M.
AU  - Gulicovski, Jelena J.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Dodevski, Vladimir
AU  - Mentus, Slavko V.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/450
AB  - The solid solutions of CeO2 with one or more rare-earth oxides among Yb2O3, Sm2O3, and Gd2O3 are synthesized by either modified glycine nitrate procedure (MGNP) or self-propagating reaction at room temperature (SPRT). The overall mole fraction of rare-earth oxide dopants was x = 0.2. The characterization was committed by XRPD, TEM, BET, and Raman Spectroscopy methods. According to XRPD and Raman spectroscopy, the obtained products presented the single-phase solid solutions with basic fluorite-type CeO2 structure, regardless on the number and the concentration of dopants. Both XRPD and TEM analysis evidenced the nanometer particle dimensions. The defect model was applied to calculate lattice parameters of single-, co-, and multi-doped solids. The sintering of the sample nanopowders was performed at 1550 A degrees C, in air atmosphere. The sintered samples were characterized by XRPD, SEM, and complex impedance methods. The sintering did not affect the concentration ratios of the constituents. The highest conductivity at 700 A degrees C amounting to 2.14 x 10(-2) and 1.92 x 10(-2) Omega(-1) cm(-1) was measured for the sample Ce0.8Sm0.08Gd0.12O2-delta, synthesized by SPRT and MGNP methods, respectively. The corresponding activation energies of conductivity, measured in the temperature range 500-700 A degrees C, amounted to 0.24 and 0.23 eV.
T2  - Journal of Materials Science
T1  - Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells
VL  - 50
IS  - 10
SP  - 3781
EP  - 3794
DO  - 10.1007/s10853-015-8943-y
ER  - 

@article{
author = "Stojmenović, Marija and Zunic, M. and Gulicovski, Jelena J. and Bajuk-Bogdanović, Danica V. and Holclajtner-Antunović, Ivanka D. and Dodevski, Vladimir and Mentus, Slavko V.",
year = "2015",
abstract = "The solid solutions of CeO2 with one or more rare-earth oxides among Yb2O3, Sm2O3, and Gd2O3 are synthesized by either modified glycine nitrate procedure (MGNP) or self-propagating reaction at room temperature (SPRT). The overall mole fraction of rare-earth oxide dopants was x = 0.2. The characterization was committed by XRPD, TEM, BET, and Raman Spectroscopy methods. According to XRPD and Raman spectroscopy, the obtained products presented the single-phase solid solutions with basic fluorite-type CeO2 structure, regardless on the number and the concentration of dopants. Both XRPD and TEM analysis evidenced the nanometer particle dimensions. The defect model was applied to calculate lattice parameters of single-, co-, and multi-doped solids. The sintering of the sample nanopowders was performed at 1550 A degrees C, in air atmosphere. The sintered samples were characterized by XRPD, SEM, and complex impedance methods. The sintering did not affect the concentration ratios of the constituents. The highest conductivity at 700 A degrees C amounting to 2.14 x 10(-2) and 1.92 x 10(-2) Omega(-1) cm(-1) was measured for the sample Ce0.8Sm0.08Gd0.12O2-delta, synthesized by SPRT and MGNP methods, respectively. The corresponding activation energies of conductivity, measured in the temperature range 500-700 A degrees C, amounted to 0.24 and 0.23 eV.",
journal = "Journal of Materials Science",
title = "Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells",
volume = "50",
number = "10",
pages = "3781-3794",
doi = "10.1007/s10853-015-8943-y"
}

Stojmenović, M., Zunic, M., Gulicovski, J. J., Bajuk-Bogdanović, D. V., Holclajtner-Antunović, I. D., Dodevski, V.,& Mentus, S. V.. (2015). Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells. in Journal of Materials Science, 50(10), 3781-3794.
https://doi.org/10.1007/s10853-015-8943-y

Stojmenović M, Zunic M, Gulicovski JJ, Bajuk-Bogdanović DV, Holclajtner-Antunović ID, Dodevski V, Mentus SV. Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells. in Journal of Materials Science. 2015;50(10):3781-3794.
doi:10.1007/s10853-015-8943-y .

Stojmenović, Marija, Zunic, M., Gulicovski, Jelena J., Bajuk-Bogdanović, Danica V., Holclajtner-Antunović, Ivanka D., Dodevski, Vladimir, Mentus, Slavko V., "Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells" in Journal of Materials Science, 50, no. 10 (2015):3781-3794,
https://doi.org/10.1007/s10853-015-8943-y . .

TY  - CONF
AU  - Volarevic, V.
AU  - Paunović, Verica G.
AU  - Marković, Zoran M.
AU  - Marković-Simović, Bojana
AU  - Misirkić-Marjanović, Maja
AU  - Todorović-Marković, Biljana
AU  - Bojic, S.
AU  - Vucicevic, L.
AU  - Jovanović, Svetlana P.
AU  - Arsenijević, Nebojša N.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Milosavljević, Momir
AU  - Dramićanin, Miroslav
AU  - Kravić-Stevović, Tamara K.
AU  - Ćirić, Darko
AU  - Lukić, M. L.
AU  - Trajković, Vladimir S.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7082
C3  - Journal of Hepatology
T1  - Graphene Quantum Dots Attenuate Concanavalin A-Induced Hepatitis
VL  - 62
SP  - S483
EP  - S484
DO  - 10.1016/S0168-8278(15)30665-6
ER  - 

@conference{
author = "Volarevic, V. and Paunović, Verica G. and Marković, Zoran M. and Marković-Simović, Bojana and Misirkić-Marjanović, Maja and Todorović-Marković, Biljana and Bojic, S. and Vucicevic, L. and Jovanović, Svetlana P. and Arsenijević, Nebojša N. and Holclajtner-Antunović, Ivanka D. and Milosavljević, Momir and Dramićanin, Miroslav and Kravić-Stevović, Tamara K. and Ćirić, Darko and Lukić, M. L. and Trajković, Vladimir S.",
year = "2015",
journal = "Journal of Hepatology",
title = "Graphene Quantum Dots Attenuate Concanavalin A-Induced Hepatitis",
volume = "62",
pages = "S483-S484",
doi = "10.1016/S0168-8278(15)30665-6"
}

Volarevic, V., Paunović, V. G., Marković, Z. M., Marković-Simović, B., Misirkić-Marjanović, M., Todorović-Marković, B., Bojic, S., Vucicevic, L., Jovanović, S. P., Arsenijević, N. N., Holclajtner-Antunović, I. D., Milosavljević, M., Dramićanin, M., Kravić-Stevović, T. K., Ćirić, D., Lukić, M. L.,& Trajković, V. S.. (2015). Graphene Quantum Dots Attenuate Concanavalin A-Induced Hepatitis. in Journal of Hepatology, 62, S483-S484.
https://doi.org/10.1016/S0168-8278(15)30665-6

Volarevic V, Paunović VG, Marković ZM, Marković-Simović B, Misirkić-Marjanović M, Todorović-Marković B, Bojic S, Vucicevic L, Jovanović SP, Arsenijević NN, Holclajtner-Antunović ID, Milosavljević M, Dramićanin M, Kravić-Stevović TK, Ćirić D, Lukić ML, Trajković VS. Graphene Quantum Dots Attenuate Concanavalin A-Induced Hepatitis. in Journal of Hepatology. 2015;62:S483-S484.
doi:10.1016/S0168-8278(15)30665-6 .

Volarevic, V., Paunović, Verica G., Marković, Zoran M., Marković-Simović, Bojana, Misirkić-Marjanović, Maja, Todorović-Marković, Biljana, Bojic, S., Vucicevic, L., Jovanović, Svetlana P., Arsenijević, Nebojša N., Holclajtner-Antunović, Ivanka D., Milosavljević, Momir, Dramićanin, Miroslav, Kravić-Stevović, Tamara K., Ćirić, Darko, Lukić, M. L., Trajković, Vladimir S., "Graphene Quantum Dots Attenuate Concanavalin A-Induced Hepatitis" in Journal of Hepatology, 62 (2015):S483-S484,
https://doi.org/10.1016/S0168-8278(15)30665-6 . .

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Budimir, Milica
AU  - Peruško, Davor
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Pavlović, Vladimir B.
AU  - Syrgiannis, Zois
AU  - Bonasera, Aurelio
AU  - Todorović-Marković, Biljana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/797
AB  - In this paper, we performed synthesis of graphene thin films by rapid thermal annealing (RTA) of thin nickel copper (Ni/Cu) layers deposited on spectroscopic graphite as a carbon source. Furthermore, we investigated the effect of annealing temperature and annealing time on formation and quality of synthesized graphene films. Raman spectroscopy study showed that annealing at lower temperatures results in formation of monolayer graphene films, while annealing at higher temperatures results in formation of multilayer graphene films. We used Raman mapping to determine the distribution of graphene sheets. Surface morphology of graphene thin films was investigated by atomic force microscopy and scanning electron microscopy with EDS probe. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Synthetic Metals
T1  - The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing
VL  - 209
SP  - 461
EP  - 467
DO  - 10.1016/j.synthmet.2015.08.015
ER  - 

@article{
author = "Prekodravac, Jovana and Marković, Zoran M. and Jovanović, Svetlana P. and Budimir, Milica and Peruško, Davor and Holclajtner-Antunović, Ivanka D. and Pavlović, Vladimir B. and Syrgiannis, Zois and Bonasera, Aurelio and Todorović-Marković, Biljana",
year = "2015",
abstract = "In this paper, we performed synthesis of graphene thin films by rapid thermal annealing (RTA) of thin nickel copper (Ni/Cu) layers deposited on spectroscopic graphite as a carbon source. Furthermore, we investigated the effect of annealing temperature and annealing time on formation and quality of synthesized graphene films. Raman spectroscopy study showed that annealing at lower temperatures results in formation of monolayer graphene films, while annealing at higher temperatures results in formation of multilayer graphene films. We used Raman mapping to determine the distribution of graphene sheets. Surface morphology of graphene thin films was investigated by atomic force microscopy and scanning electron microscopy with EDS probe. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Synthetic Metals",
title = "The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing",
volume = "209",
pages = "461-467",
doi = "10.1016/j.synthmet.2015.08.015"
}

Prekodravac, J., Marković, Z. M., Jovanović, S. P., Budimir, M., Peruško, D., Holclajtner-Antunović, I. D., Pavlović, V. B., Syrgiannis, Z., Bonasera, A.,& Todorović-Marković, B.. (2015). The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing. in Synthetic Metals, 209, 461-467.
https://doi.org/10.1016/j.synthmet.2015.08.015

Prekodravac J, Marković ZM, Jovanović SP, Budimir M, Peruško D, Holclajtner-Antunović ID, Pavlović VB, Syrgiannis Z, Bonasera A, Todorović-Marković B. The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing. in Synthetic Metals. 2015;209:461-467.
doi:10.1016/j.synthmet.2015.08.015 .

Prekodravac, Jovana, Marković, Zoran M., Jovanović, Svetlana P., Budimir, Milica, Peruško, Davor, Holclajtner-Antunović, Ivanka D., Pavlović, Vladimir B., Syrgiannis, Zois, Bonasera, Aurelio, Todorović-Marković, Biljana, "The effect of annealing temperature and time on synthesis of graphene thin films by rapid thermal annealing" in Synthetic Metals, 209 (2015):461-467,
https://doi.org/10.1016/j.synthmet.2015.08.015 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Prekodravac, Jovana
AU  - Tošić, Dragana
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Milosavljević, Momir
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/412
AB  - In this paper, a facile synthesis of water-soluble curcumin nanocrystals is reported. Solvent exchange method was applied to synthesize curcumin nanocrystals. Different techniques were used to characterize the structural and photophysical properties of the curcumin nanocrystals. It was found that the nanocurcumin prepared by this method had good chemical and physical stability, could be stored in the powder form at room temperature, and was freely dispersible in water. It was established that the size of curcumin nanocrystals varied in the range of 20-500 nm. Fourier transform infrared spectroscopy and UV-Vis analyses showed the presence of tetrahydrofuran inside the curcumin nanocrystals. Furthermore, it was found that the nanocurcumin emitted photoluminescence with a yellow green color.
T2  - Journal of the Serbian Chemical Society
T1  - Facile synthesis of water-soluble curcumin nanocrystals
VL  - 80
IS  - 1
SP  - 63
EP  - 72
DO  - 10.2298/JSC140819117M
ER  - 

@article{
author = "Marković, Zoran M. and Prekodravac, Jovana and Tošić, Dragana and Holclajtner-Antunović, Ivanka D. and Milosavljević, Momir and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2015",
abstract = "In this paper, a facile synthesis of water-soluble curcumin nanocrystals is reported. Solvent exchange method was applied to synthesize curcumin nanocrystals. Different techniques were used to characterize the structural and photophysical properties of the curcumin nanocrystals. It was found that the nanocurcumin prepared by this method had good chemical and physical stability, could be stored in the powder form at room temperature, and was freely dispersible in water. It was established that the size of curcumin nanocrystals varied in the range of 20-500 nm. Fourier transform infrared spectroscopy and UV-Vis analyses showed the presence of tetrahydrofuran inside the curcumin nanocrystals. Furthermore, it was found that the nanocurcumin emitted photoluminescence with a yellow green color.",
journal = "Journal of the Serbian Chemical Society",
title = "Facile synthesis of water-soluble curcumin nanocrystals",
volume = "80",
number = "1",
pages = "63-72",
doi = "10.2298/JSC140819117M"
}

Marković, Z. M., Prekodravac, J., Tošić, D., Holclajtner-Antunović, I. D., Milosavljević, M., Dramićanin, M.,& Todorović-Marković, B.. (2015). Facile synthesis of water-soluble curcumin nanocrystals. in Journal of the Serbian Chemical Society, 80(1), 63-72.
https://doi.org/10.2298/JSC140819117M

Marković ZM, Prekodravac J, Tošić D, Holclajtner-Antunović ID, Milosavljević M, Dramićanin M, Todorović-Marković B. Facile synthesis of water-soluble curcumin nanocrystals. in Journal of the Serbian Chemical Society. 2015;80(1):63-72.
doi:10.2298/JSC140819117M .

Marković, Zoran M., Prekodravac, Jovana, Tošić, Dragana, Holclajtner-Antunović, Ivanka D., Milosavljević, Momir, Dramićanin, Miroslav, Todorović-Marković, Biljana, "Facile synthesis of water-soluble curcumin nanocrystals" in Journal of the Serbian Chemical Society, 80, no. 1 (2015):63-72,
https://doi.org/10.2298/JSC140819117M . .

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Peruško, Davor
AU  - Pavlović, Vladimir B.
AU  - Tošić, Dragana
AU  - Todorović-Marković, Biljana
AU  - Marković, Zoran M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7063
AB  - In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.
T2  - Physica Scripta
T1  - Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014030
ER  - 

@article{
author = "Prekodravac, Jovana and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Peruško, Davor and Pavlović, Vladimir B. and Tošić, Dragana and Todorović-Marković, Biljana and Marković, Zoran M.",
year = "2014",
abstract = "In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.",
journal = "Physica Scripta",
title = "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014030"
}

Prekodravac, J., Jovanović, S. P., Holclajtner-Antunović, I. D., Peruško, D., Pavlović, V. B., Tošić, D., Todorović-Marković, B.,& Marković, Z. M.. (2014). Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014030

Prekodravac J, Jovanović SP, Holclajtner-Antunović ID, Peruško D, Pavlović VB, Tošić D, Todorović-Marković B, Marković ZM. Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014030 .

Prekodravac, Jovana, Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Peruško, Davor, Pavlović, Vladimir B., Tošić, Dragana, Todorović-Marković, Biljana, Marković, Zoran M., "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014030 . .

TY  - JOUR
AU  - Kleut, Duška
AU  - Marković, Zoran M.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Dramićanin, Miroslav
AU  - Kepić, Dejan P.
AU  - Todorović-Marković, Biljana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7062
AB  - This paper represents results of a Raman spectroscopy study of gamma-irradiated few-layer graphene thin films at three different doses: 25, 50 and 110 kGy. Graphene thin films were deposited by the vacuum filtration method and then transferred onto glass substrate. Raman spectroscopy and atomic force microscopy analysis have shown that the average in-plane crystallite size La of graphene thin films varies slightly when an irradiation dose is applied. Raman spectroscopy revealed that gamma irradiation of graphene thin films resulted in slight p-doping of the graphene thin film surface. It was found that during gamma irradiation at a dose of 110 kGy, the graphene sheets merged. As a result, the number of incorporated defects in the graphene structure was reduced (the ID/IG ratio decreased with the increase in the applied dose).
T2  - Physica Scripta
T1  - Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014025
ER  - 

@article{
author = "Kleut, Duška and Marković, Zoran M. and Holclajtner-Antunović, Ivanka D. and Dramićanin, Miroslav and Kepić, Dejan P. and Todorović-Marković, Biljana",
year = "2014",
abstract = "This paper represents results of a Raman spectroscopy study of gamma-irradiated few-layer graphene thin films at three different doses: 25, 50 and 110 kGy. Graphene thin films were deposited by the vacuum filtration method and then transferred onto glass substrate. Raman spectroscopy and atomic force microscopy analysis have shown that the average in-plane crystallite size La of graphene thin films varies slightly when an irradiation dose is applied. Raman spectroscopy revealed that gamma irradiation of graphene thin films resulted in slight p-doping of the graphene thin film surface. It was found that during gamma irradiation at a dose of 110 kGy, the graphene sheets merged. As a result, the number of incorporated defects in the graphene structure was reduced (the ID/IG ratio decreased with the increase in the applied dose).",
journal = "Physica Scripta",
title = "Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014025"
}

Kleut, D., Marković, Z. M., Holclajtner-Antunović, I. D., Dramićanin, M., Kepić, D. P.,& Todorović-Marković, B.. (2014). Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014025

Kleut D, Marković ZM, Holclajtner-Antunović ID, Dramićanin M, Kepić DP, Todorović-Marković B. Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014025 .

Kleut, Duška, Marković, Zoran M., Holclajtner-Antunović, Ivanka D., Dramićanin, Miroslav, Kepić, Dejan P., Todorović-Marković, Biljana, "Gamma ray-assisted irradiation of few-layer graphene films: a Raman spectroscopy study" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014025 . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Kleut, Duška
AU  - Todorović-Marković, Biljana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7061
AB  - In this paper we present a novel method to obtain a stable dispersion of graphene in water using carbon quantum dots as surface active agents. In this way it is possible to achieve graphene concentrations in dispersion up to 2.7 mg ml(-1). Fourier transform infrared spectroscopy and UV-Vis measurements confirmed the presence of oxygen-containing functional groups in the graphene-carbon quantum dot (gCQD) structure, responsible for its good solubility in water. The stability of the gCQD dispersion is due to pi-pi interactions formed between graphene and graphene-like sites of carbon quantum dots. According to Raman spectroscopy, as well as transmission electron microscopy and atomic force microscopy analysis, graphene sheets consist of several layers.
T2  - Physica Scripta
T1  - Novel method for graphene functionalization
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014024
ER  - 

@article{
author = "Kepić, Dejan P. and Marković, Zoran M. and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Kleut, Duška and Todorović-Marković, Biljana",
year = "2014",
abstract = "In this paper we present a novel method to obtain a stable dispersion of graphene in water using carbon quantum dots as surface active agents. In this way it is possible to achieve graphene concentrations in dispersion up to 2.7 mg ml(-1). Fourier transform infrared spectroscopy and UV-Vis measurements confirmed the presence of oxygen-containing functional groups in the graphene-carbon quantum dot (gCQD) structure, responsible for its good solubility in water. The stability of the gCQD dispersion is due to pi-pi interactions formed between graphene and graphene-like sites of carbon quantum dots. According to Raman spectroscopy, as well as transmission electron microscopy and atomic force microscopy analysis, graphene sheets consist of several layers.",
journal = "Physica Scripta",
title = "Novel method for graphene functionalization",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014024"
}

Kepić, D. P., Marković, Z. M., Jovanović, S. P., Holclajtner-Antunović, I. D., Kleut, D.,& Todorović-Marković, B.. (2014). Novel method for graphene functionalization. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014024

Kepić DP, Marković ZM, Jovanović SP, Holclajtner-Antunović ID, Kleut D, Todorović-Marković B. Novel method for graphene functionalization. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014024 .

Kepić, Dejan P., Marković, Zoran M., Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Kleut, Duška, Todorović-Marković, Biljana, "Novel method for graphene functionalization" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014024 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Marković, Zoran M.
AU  - Kleut, Duška
AU  - Dramićanin, Miroslav
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Milosavljević, Momir
AU  - La Parola, Valeria
AU  - Syrgiannis, Zois
AU  - Todorović-Marković, Biljana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6085
AB  - Single wall carbon nanotubes (SWCNTs) were exposed to gamma irradiation in oxidative (H2O, NH4OH) and reductive (H2O and NH4OH both mixed with isopropyl alcohol) media. The structure has been investigated with microscopic (atomic force and transmission electron microscopy), spectroscopic (Raman, X-ray photoelectron, and FTIR spectroscopy) techniques, and by thermogravimetric analysis. Reductive media offer the possibility for green chemistry reduction of SWCNTs: after gamma irradiation, SWCNTs lose C-O bonds. Furthermore, irradiation in these media increases the fraction of sp(2) hybridized carbon atoms in structure of SWCNTs and prevents their amorphization. The presence of isopropyl alcohol in reductive media contributed to the preservation of structures unity. On the other hand, the most effective procedure is the one that occurs in oxidative media and yields in debundled, cut, and annihilated carbon nanotubes. The smaller diameter and the metallic ones are the most affected.
T2  - Journal of Physical Chemistry. C
T1  - Structural Analysis of Single Wall Carbon Nanotubes Exposed to Oxidation and Reduction Conditions in the Course of Gamma Irradiation
VL  - 118
IS  - 29
SP  - 16147
EP  - 16155
DO  - 10.1021/jp502685n
ER  - 

@article{
author = "Jovanović, Svetlana P. and Marković, Zoran M. and Kleut, Duška and Dramićanin, Miroslav and Holclajtner-Antunović, Ivanka D. and Milosavljević, Momir and La Parola, Valeria and Syrgiannis, Zois and Todorović-Marković, Biljana",
year = "2014",
abstract = "Single wall carbon nanotubes (SWCNTs) were exposed to gamma irradiation in oxidative (H2O, NH4OH) and reductive (H2O and NH4OH both mixed with isopropyl alcohol) media. The structure has been investigated with microscopic (atomic force and transmission electron microscopy), spectroscopic (Raman, X-ray photoelectron, and FTIR spectroscopy) techniques, and by thermogravimetric analysis. Reductive media offer the possibility for green chemistry reduction of SWCNTs: after gamma irradiation, SWCNTs lose C-O bonds. Furthermore, irradiation in these media increases the fraction of sp(2) hybridized carbon atoms in structure of SWCNTs and prevents their amorphization. The presence of isopropyl alcohol in reductive media contributed to the preservation of structures unity. On the other hand, the most effective procedure is the one that occurs in oxidative media and yields in debundled, cut, and annihilated carbon nanotubes. The smaller diameter and the metallic ones are the most affected.",
journal = "Journal of Physical Chemistry. C",
title = "Structural Analysis of Single Wall Carbon Nanotubes Exposed to Oxidation and Reduction Conditions in the Course of Gamma Irradiation",
volume = "118",
number = "29",
pages = "16147-16155",
doi = "10.1021/jp502685n"
}

Jovanović, S. P., Marković, Z. M., Kleut, D., Dramićanin, M., Holclajtner-Antunović, I. D., Milosavljević, M., La Parola, V., Syrgiannis, Z.,& Todorović-Marković, B.. (2014). Structural Analysis of Single Wall Carbon Nanotubes Exposed to Oxidation and Reduction Conditions in the Course of Gamma Irradiation. in Journal of Physical Chemistry. C, 118(29), 16147-16155.
https://doi.org/10.1021/jp502685n

Jovanović SP, Marković ZM, Kleut D, Dramićanin M, Holclajtner-Antunović ID, Milosavljević M, La Parola V, Syrgiannis Z, Todorović-Marković B. Structural Analysis of Single Wall Carbon Nanotubes Exposed to Oxidation and Reduction Conditions in the Course of Gamma Irradiation. in Journal of Physical Chemistry. C. 2014;118(29):16147-16155.
doi:10.1021/jp502685n .

Jovanović, Svetlana P., Marković, Zoran M., Kleut, Duška, Dramićanin, Miroslav, Holclajtner-Antunović, Ivanka D., Milosavljević, Momir, La Parola, Valeria, Syrgiannis, Zois, Todorović-Marković, Biljana, "Structural Analysis of Single Wall Carbon Nanotubes Exposed to Oxidation and Reduction Conditions in the Course of Gamma Irradiation" in Journal of Physical Chemistry. C, 118, no. 29 (2014):16147-16155,
https://doi.org/10.1021/jp502685n . .