TY  - JOUR
AU  - Huskić, Miroslav
AU  - Kepić, Dejan
AU  - Kleut, Duška
AU  - Mozetič, Miran
AU  - Vesel, Alenka
AU  - Anžlovar, Alojz
AU  - Bajuk Bogdanović, Danica
AU  - Jovanović, Svetlana
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12874
AB  - The present study focuses on correlations between three parameters: (1) graphite particle
size, (2) the ratio of graphite to oxidizing agent (KMnO4
), and (3) the ratio of graphite to acid
(H2SO4 and H3PO4
), with the reaction yield, structure, and properties of graphene oxide (GO). The
correlations are a challenge, as these three parameters can hardly be separated from each other due to
the variations in the viscosity of the system. The larger the graphite particles, the higher the viscosity
of GO. Decreasing the ratio of graphite to KMnO4
from 1:4 to 1:6 generally leads to a higher degree
of oxidation and a higher reaction yield. However, the differences are very small. Increasing the
graphite-to-acid-volume ratio from 1 g/60 mL to 1 g/80 mL, except for the smallest particles, reduced
the degree of oxidation and slightly reduced the reaction yield. However, the reaction yield mainly
depends on the extent of purification of GO by water, not on the reaction conditions. The large
differences in the thermal decomposition of GO are mainly due to the bulk particle size and less to
other parameters
T2  - Nanomaterials
T1  - The Influence of Reaction Conditions on the Properties of Graphene Oxide
VL  - 14
IS  - 3
SP  - 281
DO  - 10.3390/nano14030281
ER  - 

@article{
author = "Huskić, Miroslav and Kepić, Dejan and Kleut, Duška and Mozetič, Miran and Vesel, Alenka and Anžlovar, Alojz and Bajuk Bogdanović, Danica and Jovanović, Svetlana",
year = "2024",
abstract = "The present study focuses on correlations between three parameters: (1) graphite particle
size, (2) the ratio of graphite to oxidizing agent (KMnO4
), and (3) the ratio of graphite to acid
(H2SO4 and H3PO4
), with the reaction yield, structure, and properties of graphene oxide (GO). The
correlations are a challenge, as these three parameters can hardly be separated from each other due to
the variations in the viscosity of the system. The larger the graphite particles, the higher the viscosity
of GO. Decreasing the ratio of graphite to KMnO4
from 1:4 to 1:6 generally leads to a higher degree
of oxidation and a higher reaction yield. However, the differences are very small. Increasing the
graphite-to-acid-volume ratio from 1 g/60 mL to 1 g/80 mL, except for the smallest particles, reduced
the degree of oxidation and slightly reduced the reaction yield. However, the reaction yield mainly
depends on the extent of purification of GO by water, not on the reaction conditions. The large
differences in the thermal decomposition of GO are mainly due to the bulk particle size and less to
other parameters",
journal = "Nanomaterials",
title = "The Influence of Reaction Conditions on the Properties of Graphene Oxide",
volume = "14",
number = "3",
pages = "281",
doi = "10.3390/nano14030281"
}

Huskić, M., Kepić, D., Kleut, D., Mozetič, M., Vesel, A., Anžlovar, A., Bajuk Bogdanović, D.,& Jovanović, S.. (2024). The Influence of Reaction Conditions on the Properties of Graphene Oxide. in Nanomaterials, 14(3), 281.
https://doi.org/10.3390/nano14030281

Huskić M, Kepić D, Kleut D, Mozetič M, Vesel A, Anžlovar A, Bajuk Bogdanović D, Jovanović S. The Influence of Reaction Conditions on the Properties of Graphene Oxide. in Nanomaterials. 2024;14(3):281.
doi:10.3390/nano14030281 .

Huskić, Miroslav, Kepić, Dejan, Kleut, Duška, Mozetič, Miran, Vesel, Alenka, Anžlovar, Alojz, Bajuk Bogdanović, Danica, Jovanović, Svetlana, "The Influence of Reaction Conditions on the Properties of Graphene Oxide" in Nanomaterials, 14, no. 3 (2024):281,
https://doi.org/10.3390/nano14030281 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Marković, Zoran M.
AU  - Budimir, Milica
AU  - Prekodravac, Jovana
AU  - Zmejkoski, Danica
AU  - Kepić, Dejan
AU  - Bonasera, Aurelio
AU  - Todorović-Marković, Biljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10926
AB  - The large number of deaths induced by carcinoma and infections indicates that the need for new, better, targeted therapy is higher than ever. Apart from classical treatments and medication, photodynamic therapy (PDT) is one of the possible approaches to cure these clinical conditions. This strategy offers several advantages, such as lower toxicity, selective treatment, faster recovery time, avoidance of systemic toxic effects, and others. Unfortunately, there is a small number of agents that are approved for usage in clinical PDT. Novel, efficient, biocompatible PDT agents are, thus, highly desired. One of the most promising candidates is represented by the broad family of carbon-based quantum dots, such as graphene quantum dots (GQDs), carbon quantum dots (CQDs), carbon nanodots (CNDs), and carbonized polymer dots (CPDs). In this review paper, these new smart nanomaterials are discussed as potential PDT agents, detailing their toxicity in the dark, and when they are exposed to light, as well as their effects on carcinoma and bacterial cells. The photoinduced effects of carbon-based quantum dots on bacteria and viruses are particularly interesting, since dots usually generate several highly toxic reactive oxygen species under blue light. These species are acting as bombs on pathogen cells, causing various devastating and toxic effects on those targets.
T2  - Pharmaceutics
T1  - Lights and Dots toward Therapy—Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy
VL  - 15
IS  - 4
SP  - 1170
DO  - 10.3390/pharmaceutics15041170
ER  - 

@article{
author = "Jovanović, Svetlana P. and Marković, Zoran M. and Budimir, Milica and Prekodravac, Jovana and Zmejkoski, Danica and Kepić, Dejan and Bonasera, Aurelio and Todorović-Marković, Biljana",
year = "2023",
abstract = "The large number of deaths induced by carcinoma and infections indicates that the need for new, better, targeted therapy is higher than ever. Apart from classical treatments and medication, photodynamic therapy (PDT) is one of the possible approaches to cure these clinical conditions. This strategy offers several advantages, such as lower toxicity, selective treatment, faster recovery time, avoidance of systemic toxic effects, and others. Unfortunately, there is a small number of agents that are approved for usage in clinical PDT. Novel, efficient, biocompatible PDT agents are, thus, highly desired. One of the most promising candidates is represented by the broad family of carbon-based quantum dots, such as graphene quantum dots (GQDs), carbon quantum dots (CQDs), carbon nanodots (CNDs), and carbonized polymer dots (CPDs). In this review paper, these new smart nanomaterials are discussed as potential PDT agents, detailing their toxicity in the dark, and when they are exposed to light, as well as their effects on carcinoma and bacterial cells. The photoinduced effects of carbon-based quantum dots on bacteria and viruses are particularly interesting, since dots usually generate several highly toxic reactive oxygen species under blue light. These species are acting as bombs on pathogen cells, causing various devastating and toxic effects on those targets.",
journal = "Pharmaceutics",
title = "Lights and Dots toward Therapy—Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy",
volume = "15",
number = "4",
pages = "1170",
doi = "10.3390/pharmaceutics15041170"
}

Jovanović, S. P., Marković, Z. M., Budimir, M., Prekodravac, J., Zmejkoski, D., Kepić, D., Bonasera, A.,& Todorović-Marković, B.. (2023). Lights and Dots toward Therapy—Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy. in Pharmaceutics, 15(4), 1170.
https://doi.org/10.3390/pharmaceutics15041170

Jovanović SP, Marković ZM, Budimir M, Prekodravac J, Zmejkoski D, Kepić D, Bonasera A, Todorović-Marković B. Lights and Dots toward Therapy—Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy. in Pharmaceutics. 2023;15(4):1170.
doi:10.3390/pharmaceutics15041170 .

Jovanović, Svetlana P., Marković, Zoran M., Budimir, Milica, Prekodravac, Jovana, Zmejkoski, Danica, Kepić, Dejan, Bonasera, Aurelio, Todorović-Marković, Biljana, "Lights and Dots toward Therapy—Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy" in Pharmaceutics, 15, no. 4 (2023):1170,
https://doi.org/10.3390/pharmaceutics15041170 . .

TY  - CONF
AU  - Stefanović, Anđela
AU  - Kepić, Dejan
AU  - Jovanović Vučetić, Svetlana
AU  - Haddadi, Kamel
AU  - Todorović Marković, Biljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12320
AB  - Silver nitrate has been exposed to low-dose (1–20 kGy) gamma irradiation in the presence of graphene-based material (graphene oxide or electrochemically exfoliated graphene) to form silver nanoparticles (Ag NPs). The successful nucleation and growth of Ag NPs, which produce the evenly covered graphene surface, are made possible by the vast surface area of those graphene-based materials as well as the presence of oxygen-containing functional groups on the surface. With a significant size distribution of 10–50 nm for graphene oxide and 10–100 nm for electrochemically exfoliated graphene, the produced Ag NPs were spherical. We also performed ElectroMagnetic Interference (EMI) shielding performance measurements of these materials. EMI shielding performance measurement revealed relatively good performance of the EEG material whereas GO material does not show EM shielding.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Measurement of EMI shielding perfomance of graphene oxide – silver nanoparticles composites
SP  - 47
EP  - 47
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12320
ER  - 

@conference{
author = "Stefanović, Anđela and Kepić, Dejan and Jovanović Vučetić, Svetlana and Haddadi, Kamel and Todorović Marković, Biljana",
year = "2023",
abstract = "Silver nitrate has been exposed to low-dose (1–20 kGy) gamma irradiation in the presence of graphene-based material (graphene oxide or electrochemically exfoliated graphene) to form silver nanoparticles (Ag NPs). The successful nucleation and growth of Ag NPs, which produce the evenly covered graphene surface, are made possible by the vast surface area of those graphene-based materials as well as the presence of oxygen-containing functional groups on the surface. With a significant size distribution of 10–50 nm for graphene oxide and 10–100 nm for electrochemically exfoliated graphene, the produced Ag NPs were spherical. We also performed ElectroMagnetic Interference (EMI) shielding performance measurements of these materials. EMI shielding performance measurement revealed relatively good performance of the EEG material whereas GO material does not show EM shielding.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Measurement of EMI shielding perfomance of graphene oxide – silver nanoparticles composites",
pages = "47-47",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12320"
}

Stefanović, A., Kepić, D., Jovanović Vučetić, S., Haddadi, K.,& Todorović Marković, B.. (2023). Measurement of EMI shielding perfomance of graphene oxide – silver nanoparticles composites. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 47-47.
https://hdl.handle.net/21.15107/rcub_vinar_12320

Stefanović A, Kepić D, Jovanović Vučetić S, Haddadi K, Todorović Marković B. Measurement of EMI shielding perfomance of graphene oxide – silver nanoparticles composites. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:47-47.
https://hdl.handle.net/21.15107/rcub_vinar_12320 .

Stefanović, Anđela, Kepić, Dejan, Jovanović Vučetić, Svetlana, Haddadi, Kamel, Todorović Marković, Biljana, "Measurement of EMI shielding perfomance of graphene oxide – silver nanoparticles composites" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):47-47,
https://hdl.handle.net/21.15107/rcub_vinar_12320 .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Stefanović, Anđela M.
AU  - Budimir, Milica
AU  - Pavlović, Vladimir B.
AU  - Bonasera, Aurelio
AU  - Scopelliti, Michelangelo
AU  - Todorović-Marković, Biljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10426
AB  - Gamma irradiation provides an alternative pathway to conventional gold nanoparticle synthesis because it is simple, fast, and economical. Here, we employed gamma irradiation at low doses (1–20 kGy) to obtain gold nanoparticles (Au NPs) anchored onto graphene oxide (GO) sheets. GO was selected as a suitable platform for the nucleation and growth of Au NPs because of its large surface area and good dispersibility in water due to the presence of polar oxygen-containing functional groups in its structure. Gamma irradiation at all the applied doses led to the reduction of chloroauric acid and the formation of evenly distributed Au NPs at the GO surface, simultaneously causing the reduction of GO and partial restoration of the graphene structure. As-prepared Au NPs have predominately spheric shapes and the smallest nanoparticles were reported for the dose of 1 kGy. The increase in the irradiation dose caused either the growth of larger particles (5 and 10 kGy) or the broad distribution of particles’ sizes (20 kGy). All samples showed a temperature increase upon exposure to 800 nm laser and photothermal efficiency was the highest for the sample prepared at 20 kGy. © 2022 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Gamma rays induced synthesis of graphene oxide/gold nanoparticle composites: structural and photothermal study
VL  - 202
DO  - 10.1016/j.radphyschem.2022.110545
ER  - 

@article{
author = "Kepić, Dejan P. and Stefanović, Anđela M. and Budimir, Milica and Pavlović, Vladimir B. and Bonasera, Aurelio and Scopelliti, Michelangelo and Todorović-Marković, Biljana",
year = "2023",
abstract = "Gamma irradiation provides an alternative pathway to conventional gold nanoparticle synthesis because it is simple, fast, and economical. Here, we employed gamma irradiation at low doses (1–20 kGy) to obtain gold nanoparticles (Au NPs) anchored onto graphene oxide (GO) sheets. GO was selected as a suitable platform for the nucleation and growth of Au NPs because of its large surface area and good dispersibility in water due to the presence of polar oxygen-containing functional groups in its structure. Gamma irradiation at all the applied doses led to the reduction of chloroauric acid and the formation of evenly distributed Au NPs at the GO surface, simultaneously causing the reduction of GO and partial restoration of the graphene structure. As-prepared Au NPs have predominately spheric shapes and the smallest nanoparticles were reported for the dose of 1 kGy. The increase in the irradiation dose caused either the growth of larger particles (5 and 10 kGy) or the broad distribution of particles’ sizes (20 kGy). All samples showed a temperature increase upon exposure to 800 nm laser and photothermal efficiency was the highest for the sample prepared at 20 kGy. © 2022 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Gamma rays induced synthesis of graphene oxide/gold nanoparticle composites: structural and photothermal study",
volume = "202",
doi = "10.1016/j.radphyschem.2022.110545"
}

Kepić, D. P., Stefanović, A. M., Budimir, M., Pavlović, V. B., Bonasera, A., Scopelliti, M.,& Todorović-Marković, B.. (2023). Gamma rays induced synthesis of graphene oxide/gold nanoparticle composites: structural and photothermal study. in Radiation Physics and Chemistry, 202.
https://doi.org/10.1016/j.radphyschem.2022.110545

Kepić DP, Stefanović AM, Budimir M, Pavlović VB, Bonasera A, Scopelliti M, Todorović-Marković B. Gamma rays induced synthesis of graphene oxide/gold nanoparticle composites: structural and photothermal study. in Radiation Physics and Chemistry. 2023;202.
doi:10.1016/j.radphyschem.2022.110545 .

Kepić, Dejan P., Stefanović, Anđela M., Budimir, Milica, Pavlović, Vladimir B., Bonasera, Aurelio, Scopelliti, Michelangelo, Todorović-Marković, Biljana, "Gamma rays induced synthesis of graphene oxide/gold nanoparticle composites: structural and photothermal study" in Radiation Physics and Chemistry, 202 (2023),
https://doi.org/10.1016/j.radphyschem.2022.110545 . .

TY  - JOUR
AU  - Jovanović, Svetlana
AU  - Huskić, Miroslav
AU  - Kepić, Dejan
AU  - Yasir, Muhammad
AU  - Haddadi, Kamel
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12607
AB  - As wireless solutions for communication, information, and sensing in modern society, electromagnetic waves (EMWs) have contributed considerably to the increase in the quality of people’s everyday lives. At the same time, EMWs produce electromagnetic pollution, issues with electromagnetic interference (EMI), and radio frequency (RF) signal leakage. These circumstances lead to high demand for efficient EMI shielding materials.  To design an EMI shielding product, a compromise must be achieved between the electromagnetic shielding efficiency, the thickness of shielding materials, durability, mechanical strength, reduced volume and weight, and elasticity. Due to its ability to block EMWs, flexibility, lightweight, and chemical resistivity, graphene has been identified as a promising candidate material for efficient EMI shielding. Herein, we reviewed the studies that investigated various graphene-based composites as potential EMI shielding materials, with a focus on the composites based on graphene and silver nanowires due to their high EMI shielding efficiency, low production price, and favorable mechanical properties.
T2  - Graphene and 2D Materials
T1  - A review on graphene and graphene composites for application in electromagnetic shielding
VL  - 8
IS  - 3-4
SP  - 59
EP  - 80
DO  - 10.1007/s41127-023-00065-3
ER  - 

@article{
author = "Jovanović, Svetlana and Huskić, Miroslav and Kepić, Dejan and Yasir, Muhammad and Haddadi, Kamel",
year = "2023",
abstract = "As wireless solutions for communication, information, and sensing in modern society, electromagnetic waves (EMWs) have contributed considerably to the increase in the quality of people’s everyday lives. At the same time, EMWs produce electromagnetic pollution, issues with electromagnetic interference (EMI), and radio frequency (RF) signal leakage. These circumstances lead to high demand for efficient EMI shielding materials.  To design an EMI shielding product, a compromise must be achieved between the electromagnetic shielding efficiency, the thickness of shielding materials, durability, mechanical strength, reduced volume and weight, and elasticity. Due to its ability to block EMWs, flexibility, lightweight, and chemical resistivity, graphene has been identified as a promising candidate material for efficient EMI shielding. Herein, we reviewed the studies that investigated various graphene-based composites as potential EMI shielding materials, with a focus on the composites based on graphene and silver nanowires due to their high EMI shielding efficiency, low production price, and favorable mechanical properties.",
journal = "Graphene and 2D Materials",
title = "A review on graphene and graphene composites for application in electromagnetic shielding",
volume = "8",
number = "3-4",
pages = "59-80",
doi = "10.1007/s41127-023-00065-3"
}

Jovanović, S., Huskić, M., Kepić, D., Yasir, M.,& Haddadi, K.. (2023). A review on graphene and graphene composites for application in electromagnetic shielding. in Graphene and 2D Materials, 8(3-4), 59-80.
https://doi.org/10.1007/s41127-023-00065-3

Jovanović S, Huskić M, Kepić D, Yasir M, Haddadi K. A review on graphene and graphene composites for application in electromagnetic shielding. in Graphene and 2D Materials. 2023;8(3-4):59-80.
doi:10.1007/s41127-023-00065-3 .

Jovanović, Svetlana, Huskić, Miroslav, Kepić, Dejan, Yasir, Muhammad, Haddadi, Kamel, "A review on graphene and graphene composites for application in electromagnetic shielding" in Graphene and 2D Materials, 8, no. 3-4 (2023):59-80,
https://doi.org/10.1007/s41127-023-00065-3 . .

TY  - JOUR
AU  - Mišović, Aleksandra
AU  - Bajuk-Bogdanović, Danica V.
AU  - Kepić, Dejan
AU  - Pavlović, Vladimir B.
AU  - Huskić, Miroslav
AU  - Hasheminejad, Navid
AU  - Vuye, Cedric
AU  - Zorić, Nemanja
AU  - Jovanović, Svetlana P.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10078
AB  - The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.
T2  - Synthetic Metals
T1  - Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation
VL  - 283
SP  - 116980
DO  - 10.1016/j.synthmet.2021.116980
ER  - 

@article{
author = "Mišović, Aleksandra and Bajuk-Bogdanović, Danica V. and Kepić, Dejan and Pavlović, Vladimir B. and Huskić, Miroslav and Hasheminejad, Navid and Vuye, Cedric and Zorić, Nemanja and Jovanović, Svetlana P.",
year = "2022",
abstract = "The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.",
journal = "Synthetic Metals",
title = "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation",
volume = "283",
pages = "116980",
doi = "10.1016/j.synthmet.2021.116980"
}

Mišović, A., Bajuk-Bogdanović, D. V., Kepić, D., Pavlović, V. B., Huskić, M., Hasheminejad, N., Vuye, C., Zorić, N.,& Jovanović, S. P.. (2022). Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals, 283, 116980.
https://doi.org/10.1016/j.synthmet.2021.116980

Mišović A, Bajuk-Bogdanović DV, Kepić D, Pavlović VB, Huskić M, Hasheminejad N, Vuye C, Zorić N, Jovanović SP. Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals. 2022;283:116980.
doi:10.1016/j.synthmet.2021.116980 .

Mišović, Aleksandra, Bajuk-Bogdanović, Danica V., Kepić, Dejan, Pavlović, Vladimir B., Huskić, Miroslav, Hasheminejad, Navid, Vuye, Cedric, Zorić, Nemanja, Jovanović, Svetlana P., "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation" in Synthetic Metals, 283 (2022):116980,
https://doi.org/10.1016/j.synthmet.2021.116980 . .

TY  - CHAP
AU  - Prekodravac, Jovana
AU  - Giannakoudakis, Dimitrios A.
AU  - Colmenares, Juan Carlos
AU  - Nair, Vaishakh
AU  - Vasiljević, Bojana
AU  - Kepić, Dejan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10547
AB  - Environmental protection and energy conversion by state-of-the-art photocatalysts emerge as imperative in pursuit for ideal, sustainable, and green oriented solutions. However, major drawbacks in broader application of one of the most promising semiconductor photocatalyst, titanium dioxide (TiO2), lie in the need for enhancing visible-light absorption and elevating the photocatalytic reactivity. Toward these directions, narrowing the material band gap and functionalization of the surface chemistry are among the most prosperous materials design approaches. As reported in earlier work, the surface structure engineering proved to be an encouraging approach to endow optical and electrical properties of the TiO2-based material. For the first time, the black powder of TiO2 with a disordered lattice and hydrogen surface doping was obtained through hydrogenation under high pressure and temperature, consequently leading to narrowing the optical band gap to 1.54eV. The presented chapter aims to reveal in-depth all the literature available information related to the black titania synthesis in addition of sharing in details its prosperous physicochemical properties. Feature information related to the photocatalytic activity of black TiO2 as well as of the most crucial features will also be provided. Finally, the chapter will conclude with the derived significant benefits of such material properties in photocatalytic treatment of organic pollutants and hydrogen production. © 2023 Elsevier Inc. All rights reserved.
T2  - Novel Materials for Environmental Remediation Applications: Adsorption and Beyond
T1  - Black titania: Turning the surface chemistry toward visible-light absorption, (photo) remediation of hazardous organics and H2 production
SP  - 361
EP  - 398
DO  - 10.1016/B978-0-323-91894-7.00010-4
ER  - 

@inbook{
author = "Prekodravac, Jovana and Giannakoudakis, Dimitrios A. and Colmenares, Juan Carlos and Nair, Vaishakh and Vasiljević, Bojana and Kepić, Dejan",
year = "2022",
abstract = "Environmental protection and energy conversion by state-of-the-art photocatalysts emerge as imperative in pursuit for ideal, sustainable, and green oriented solutions. However, major drawbacks in broader application of one of the most promising semiconductor photocatalyst, titanium dioxide (TiO2), lie in the need for enhancing visible-light absorption and elevating the photocatalytic reactivity. Toward these directions, narrowing the material band gap and functionalization of the surface chemistry are among the most prosperous materials design approaches. As reported in earlier work, the surface structure engineering proved to be an encouraging approach to endow optical and electrical properties of the TiO2-based material. For the first time, the black powder of TiO2 with a disordered lattice and hydrogen surface doping was obtained through hydrogenation under high pressure and temperature, consequently leading to narrowing the optical band gap to 1.54eV. The presented chapter aims to reveal in-depth all the literature available information related to the black titania synthesis in addition of sharing in details its prosperous physicochemical properties. Feature information related to the photocatalytic activity of black TiO2 as well as of the most crucial features will also be provided. Finally, the chapter will conclude with the derived significant benefits of such material properties in photocatalytic treatment of organic pollutants and hydrogen production. © 2023 Elsevier Inc. All rights reserved.",
journal = "Novel Materials for Environmental Remediation Applications: Adsorption and Beyond",
booktitle = "Black titania: Turning the surface chemistry toward visible-light absorption, (photo) remediation of hazardous organics and H2 production",
pages = "361-398",
doi = "10.1016/B978-0-323-91894-7.00010-4"
}

Prekodravac, J., Giannakoudakis, D. A., Colmenares, J. C., Nair, V., Vasiljević, B.,& Kepić, D.. (2022). Black titania: Turning the surface chemistry toward visible-light absorption, (photo) remediation of hazardous organics and H2 production. in Novel Materials for Environmental Remediation Applications: Adsorption and Beyond, 361-398.
https://doi.org/10.1016/B978-0-323-91894-7.00010-4

Prekodravac J, Giannakoudakis DA, Colmenares JC, Nair V, Vasiljević B, Kepić D. Black titania: Turning the surface chemistry toward visible-light absorption, (photo) remediation of hazardous organics and H2 production. in Novel Materials for Environmental Remediation Applications: Adsorption and Beyond. 2022;:361-398.
doi:10.1016/B978-0-323-91894-7.00010-4 .

Prekodravac, Jovana, Giannakoudakis, Dimitrios A., Colmenares, Juan Carlos, Nair, Vaishakh, Vasiljević, Bojana, Kepić, Dejan, "Black titania: Turning the surface chemistry toward visible-light absorption, (photo) remediation of hazardous organics and H2 production" in Novel Materials for Environmental Remediation Applications: Adsorption and Beyond (2022):361-398,
https://doi.org/10.1016/B978-0-323-91894-7.00010-4 . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Kleut, Duška
AU  - Marković, Zoran M.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pavlović, Vladimir B.
AU  - Krmpot, Aleksandar
AU  - Lekić, Marina
AU  - Jovanović, Dragana J.
AU  - Todorović-Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9568
AB  - Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.
T2  - Materials Characterization
T1  - One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications
VL  - 173
SP  - 110944
DO  - 10.1016/j.matchar.2021.110944
ER  - 

@article{
author = "Kepić, Dejan P. and Kleut, Duška and Marković, Zoran M. and Bajuk-Bogdanović, Danica V. and Pavlović, Vladimir B. and Krmpot, Aleksandar and Lekić, Marina and Jovanović, Dragana J. and Todorović-Marković, Biljana",
year = "2021",
abstract = "Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.",
journal = "Materials Characterization",
title = "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications",
volume = "173",
pages = "110944",
doi = "10.1016/j.matchar.2021.110944"
}

Kepić, D. P., Kleut, D., Marković, Z. M., Bajuk-Bogdanović, D. V., Pavlović, V. B., Krmpot, A., Lekić, M., Jovanović, D. J.,& Todorović-Marković, B.. (2021). One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization, 173, 110944.
https://doi.org/10.1016/j.matchar.2021.110944

Kepić DP, Kleut D, Marković ZM, Bajuk-Bogdanović DV, Pavlović VB, Krmpot A, Lekić M, Jovanović DJ, Todorović-Marković B. One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization. 2021;173:110944.
doi:10.1016/j.matchar.2021.110944 .

Kepić, Dejan P., Kleut, Duška, Marković, Zoran M., Bajuk-Bogdanović, Danica V., Pavlović, Vladimir B., Krmpot, Aleksandar, Lekić, Marina, Jovanović, Dragana J., Todorović-Marković, Biljana, "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications" in Materials Characterization, 173 (2021):110944,
https://doi.org/10.1016/j.matchar.2021.110944 . .

TY  - CONF
AU  - Kepić, Dejan
AU  - Huskić, Miroslav
AU  - Prekodravac, Jovana
AU  - Kleut, Duška
AU  - Todorović-Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11421
AB  - This article investigates the morphology of polyaniline/electrochemically exfoliated graphene composites prepared by oxidative polymerization with ammonium persulfate at a constant temperature (15 °C). During the polymerization, the pH of the reaction mixture decreases, which was used to monitor the rate of the reaction. A granular morphology with the presence of large sheet-like structures is found to be predominant for the composite prepared without added acid, while rod-shaped and tubular morphology is characteristic for the composite prepared with the addition of glacial acetic acid. The nanotubular and nanorod morphology of the sample prepared with the addition of glacial acetic acid was also confirmed by the presence of prominent phenazine structural units in Raman spectra. The composite prepared with the addition of HCl has granular morphology with a small amount of rod-like structures.
PB  - Szeged : University of Szeged
C3  - 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary
T1  - The Morphology of Pani/Graphene Composites Prepared Under Isothermal Conditions
SP  - 159
EP  - 163
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11421
ER  - 

@conference{
author = "Kepić, Dejan and Huskić, Miroslav and Prekodravac, Jovana and Kleut, Duška and Todorović-Marković, Biljana",
year = "2021",
abstract = "This article investigates the morphology of polyaniline/electrochemically exfoliated graphene composites prepared by oxidative polymerization with ammonium persulfate at a constant temperature (15 °C). During the polymerization, the pH of the reaction mixture decreases, which was used to monitor the rate of the reaction. A granular morphology with the presence of large sheet-like structures is found to be predominant for the composite prepared without added acid, while rod-shaped and tubular morphology is characteristic for the composite prepared with the addition of glacial acetic acid. The nanotubular and nanorod morphology of the sample prepared with the addition of glacial acetic acid was also confirmed by the presence of prominent phenazine structural units in Raman spectra. The composite prepared with the addition of HCl has granular morphology with a small amount of rod-like structures.",
publisher = "Szeged : University of Szeged",
journal = "27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary",
title = "The Morphology of Pani/Graphene Composites Prepared Under Isothermal Conditions",
pages = "159-163",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11421"
}

Kepić, D., Huskić, M., Prekodravac, J., Kleut, D.,& Todorović-Marković, B.. (2021). The Morphology of Pani/Graphene Composites Prepared Under Isothermal Conditions. in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary
Szeged : University of Szeged., 159-163.
https://hdl.handle.net/21.15107/rcub_vinar_11421

Kepić D, Huskić M, Prekodravac J, Kleut D, Todorović-Marković B. The Morphology of Pani/Graphene Composites Prepared Under Isothermal Conditions. in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary. 2021;:159-163.
https://hdl.handle.net/21.15107/rcub_vinar_11421 .

Kepić, Dejan, Huskić, Miroslav, Prekodravac, Jovana, Kleut, Duška, Todorović-Marković, Biljana, "The Morphology of Pani/Graphene Composites Prepared Under Isothermal Conditions" in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary (2021):159-163,
https://hdl.handle.net/21.15107/rcub_vinar_11421 .

TY  - CONF
AU  - Prekodravac, Jovana
AU  - Vasiljević, Bojana
AU  - Marinković, Dragana
AU  - Kepić, Dejan
AU  - Kleut, Duška
AU  - Todorović Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11427
AB  - The modern age science is still searching for an effective photocatalytic material for the treatment of colored discharges from different industries which cause severe environmental issues. The excellent properties of nitrogen doped carbon quantum dots (N-CQD) enable their successful application as photocatalytic material in organic dye removal triggered under light absorption. With this in mind we first present a successfully performed microwave-assisted synthesis method, a green, simple and economically affordable method for N-CQD synthesis with high nitrogen percentage incorporated in the form of pyrrolic, pyridinic/NH2 and graphitic/NH3+ groups. The pro-oxidant and antioxidant features of the synthesized N-CQD were further presented, with high removal efficiency of synthesized N-CQD towards the methylene blue (MB) organic dye, as one of the leading water pollutants with a major risk to aquatic and human life.
PB  - Szeged : University of Szeged
C3  - 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary
T1  - Antioxidant and Prooxidant Features of N-CQD in Photocatalytic Testing of Aquatic Media
SP  - 286
EP  - 290
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11427
ER  - 

@conference{
author = "Prekodravac, Jovana and Vasiljević, Bojana and Marinković, Dragana and Kepić, Dejan and Kleut, Duška and Todorović Marković, Biljana",
year = "2021",
abstract = "The modern age science is still searching for an effective photocatalytic material for the treatment of colored discharges from different industries which cause severe environmental issues. The excellent properties of nitrogen doped carbon quantum dots (N-CQD) enable their successful application as photocatalytic material in organic dye removal triggered under light absorption. With this in mind we first present a successfully performed microwave-assisted synthesis method, a green, simple and economically affordable method for N-CQD synthesis with high nitrogen percentage incorporated in the form of pyrrolic, pyridinic/NH2 and graphitic/NH3+ groups. The pro-oxidant and antioxidant features of the synthesized N-CQD were further presented, with high removal efficiency of synthesized N-CQD towards the methylene blue (MB) organic dye, as one of the leading water pollutants with a major risk to aquatic and human life.",
publisher = "Szeged : University of Szeged",
journal = "27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary",
title = "Antioxidant and Prooxidant Features of N-CQD in Photocatalytic Testing of Aquatic Media",
pages = "286-290",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11427"
}

Prekodravac, J., Vasiljević, B., Marinković, D., Kepić, D., Kleut, D.,& Todorović Marković, B.. (2021). Antioxidant and Prooxidant Features of N-CQD in Photocatalytic Testing of Aquatic Media. in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary
Szeged : University of Szeged., 286-290.
https://hdl.handle.net/21.15107/rcub_vinar_11427

Prekodravac J, Vasiljević B, Marinković D, Kepić D, Kleut D, Todorović Marković B. Antioxidant and Prooxidant Features of N-CQD in Photocatalytic Testing of Aquatic Media. in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary. 2021;:286-290.
https://hdl.handle.net/21.15107/rcub_vinar_11427 .

Prekodravac, Jovana, Vasiljević, Bojana, Marinković, Dragana, Kepić, Dejan, Kleut, Duška, Todorović Marković, Biljana, "Antioxidant and Prooxidant Features of N-CQD in Photocatalytic Testing of Aquatic Media" in 27th International Symposium on Analytical and Environmental Problems : Proceedings; November 22-23, 2021; Szeged, Hungary (2021):286-290,
https://hdl.handle.net/21.15107/rcub_vinar_11427 .

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Kepić, Dejan P.
AU  - Colmenares, Juan Carlos
AU  - Giannakoudakis, Dimitrios A.
AU  - Jovanović, Svetlana P.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9837
AB  - The progressive development of technology and industry in the new millennium emergently requires finding a balance between economic progress and new smart materials. Graphene as a carbon allotrope since the discovery has attracted enormous attention due to several extraordinary properties that originate from its physical and chemical assets. However, the most important obstacle in graphene assembly still is the production of high-quality graphene on a large scale using cost-effective methods. The presented review article aims to give information on a turning point in graphene synthesis, with reference to a detailed analysis of electrochemical exfoliation, rapid thermal annealing and biomass pyrolysis. Selected methods for graphene and graphene-based nanomaterials production were not covered in the literature to their maximum potential, from our point of view. Through an overview of the selected synthesis methods, we explored their prospects and limitations regarding precursor type and reaction conditions. Furthermore, through several important characterization techniques for graphene, we reveal the details of the properties of graphene and graphene-based nanomaterials obtained through selected methods. Finally, a particular potential application depending on nanomaterial properties obtained through selected methods was pointed out.
T2  - Journal of Materials Chemistry C
T1  - A comprehensive review on selected graphene synthesis methods: from electrochemical exfoliation through rapid thermal annealing towards biomass pyrolysis
VL  - 9
IS  - 21
SP  - 6722
EP  - 6748
DO  - 10.1039/D1TC01316E
ER  - 

@article{
author = "Prekodravac, Jovana and Kepić, Dejan P. and Colmenares, Juan Carlos and Giannakoudakis, Dimitrios A. and Jovanović, Svetlana P.",
year = "2021",
abstract = "The progressive development of technology and industry in the new millennium emergently requires finding a balance between economic progress and new smart materials. Graphene as a carbon allotrope since the discovery has attracted enormous attention due to several extraordinary properties that originate from its physical and chemical assets. However, the most important obstacle in graphene assembly still is the production of high-quality graphene on a large scale using cost-effective methods. The presented review article aims to give information on a turning point in graphene synthesis, with reference to a detailed analysis of electrochemical exfoliation, rapid thermal annealing and biomass pyrolysis. Selected methods for graphene and graphene-based nanomaterials production were not covered in the literature to their maximum potential, from our point of view. Through an overview of the selected synthesis methods, we explored their prospects and limitations regarding precursor type and reaction conditions. Furthermore, through several important characterization techniques for graphene, we reveal the details of the properties of graphene and graphene-based nanomaterials obtained through selected methods. Finally, a particular potential application depending on nanomaterial properties obtained through selected methods was pointed out.",
journal = "Journal of Materials Chemistry C",
title = "A comprehensive review on selected graphene synthesis methods: from electrochemical exfoliation through rapid thermal annealing towards biomass pyrolysis",
volume = "9",
number = "21",
pages = "6722-6748",
doi = "10.1039/D1TC01316E"
}

Prekodravac, J., Kepić, D. P., Colmenares, J. C., Giannakoudakis, D. A.,& Jovanović, S. P.. (2021). A comprehensive review on selected graphene synthesis methods: from electrochemical exfoliation through rapid thermal annealing towards biomass pyrolysis. in Journal of Materials Chemistry C, 9(21), 6722-6748.
https://doi.org/10.1039/D1TC01316E

Prekodravac J, Kepić DP, Colmenares JC, Giannakoudakis DA, Jovanović SP. A comprehensive review on selected graphene synthesis methods: from electrochemical exfoliation through rapid thermal annealing towards biomass pyrolysis. in Journal of Materials Chemistry C. 2021;9(21):6722-6748.
doi:10.1039/D1TC01316E .

Prekodravac, Jovana, Kepić, Dejan P., Colmenares, Juan Carlos, Giannakoudakis, Dimitrios A., Jovanović, Svetlana P., "A comprehensive review on selected graphene synthesis methods: from electrochemical exfoliation through rapid thermal annealing towards biomass pyrolysis" in Journal of Materials Chemistry C, 9, no. 21 (2021):6722-6748,
https://doi.org/10.1039/D1TC01316E . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Ristić, Ivan S.
AU  - Marinović-Cincović, Milena
AU  - Peruško, Davor
AU  - Špitalsky, Zdenko
AU  - Pavlović, Vladimir B.
AU  - Budimir, Milica
AU  - Šiffalovič, Peter
AU  - Dramićanin, Miroslav
AU  - Mičušik, Matej
AU  - Kleinova, Angela
AU  - Janigova, Ivica
AU  - Marković, Zoran M.
AU  - Todorović-Marković, Biljana
PY  - 2018
UR  - http://doi.wiley.com/10.1002/pi.5620
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7796
AB  - This paper reports a simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) (SBS) nanocomposite films employing a vacuum filtration method. Graphene is exfoliated well by an electrochemical procedure and homogeneously dispersed in the polymer matrix. The prepared nanocomposite films were characterized by XRD, Fourier transform IR (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, AFM and SEM. Morphological studies showed that graphene formed a smooth coating over the surface of SBS. The increase in graphene concentration induces the wrinkling of graphene sheets at the composite surface which causes a further increase in surface roughness. The FTIR, Raman and XPS spectra of graphene/SBS nanocomposite films indicate the strong interactions between graphene and the polymer matrix. According to the XRD patterns, introducing SBS into graphene did not modify the graphene structure additionally, i.e. the crystal lattice parameters do not depend on SBS content in graphene/SBS nanocomposite films. The graphene/SBS nanocomposite films also exhibited better hydrophobicity due to the increased surface roughness and lower sheet resistivity (reduced 10 times) compared to exfoliated graphene.
T2  - Polymer International
T1  - Simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) nanocomposite films with enhanced electrical conductivity and hydrophobicity
VL  - 67
IS  - 8
SP  - 1118
EP  - 1127
DO  - 10.1002/pi.5620
ER  - 

@article{
author = "Kepić, Dejan P. and Ristić, Ivan S. and Marinović-Cincović, Milena and Peruško, Davor and Špitalsky, Zdenko and Pavlović, Vladimir B. and Budimir, Milica and Šiffalovič, Peter and Dramićanin, Miroslav and Mičušik, Matej and Kleinova, Angela and Janigova, Ivica and Marković, Zoran M. and Todorović-Marković, Biljana",
year = "2018",
abstract = "This paper reports a simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) (SBS) nanocomposite films employing a vacuum filtration method. Graphene is exfoliated well by an electrochemical procedure and homogeneously dispersed in the polymer matrix. The prepared nanocomposite films were characterized by XRD, Fourier transform IR (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, AFM and SEM. Morphological studies showed that graphene formed a smooth coating over the surface of SBS. The increase in graphene concentration induces the wrinkling of graphene sheets at the composite surface which causes a further increase in surface roughness. The FTIR, Raman and XPS spectra of graphene/SBS nanocomposite films indicate the strong interactions between graphene and the polymer matrix. According to the XRD patterns, introducing SBS into graphene did not modify the graphene structure additionally, i.e. the crystal lattice parameters do not depend on SBS content in graphene/SBS nanocomposite films. The graphene/SBS nanocomposite films also exhibited better hydrophobicity due to the increased surface roughness and lower sheet resistivity (reduced 10 times) compared to exfoliated graphene.",
journal = "Polymer International",
title = "Simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) nanocomposite films with enhanced electrical conductivity and hydrophobicity",
volume = "67",
number = "8",
pages = "1118-1127",
doi = "10.1002/pi.5620"
}

Kepić, D. P., Ristić, I. S., Marinović-Cincović, M., Peruško, D., Špitalsky, Z., Pavlović, V. B., Budimir, M., Šiffalovič, P., Dramićanin, M., Mičušik, M., Kleinova, A., Janigova, I., Marković, Z. M.,& Todorović-Marković, B.. (2018). Simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) nanocomposite films with enhanced electrical conductivity and hydrophobicity. in Polymer International, 67(8), 1118-1127.
https://doi.org/10.1002/pi.5620

Kepić DP, Ristić IS, Marinović-Cincović M, Peruško D, Špitalsky Z, Pavlović VB, Budimir M, Šiffalovič P, Dramićanin M, Mičušik M, Kleinova A, Janigova I, Marković ZM, Todorović-Marković B. Simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) nanocomposite films with enhanced electrical conductivity and hydrophobicity. in Polymer International. 2018;67(8):1118-1127.
doi:10.1002/pi.5620 .

Kepić, Dejan P., Ristić, Ivan S., Marinović-Cincović, Milena, Peruško, Davor, Špitalsky, Zdenko, Pavlović, Vladimir B., Budimir, Milica, Šiffalovič, Peter, Dramićanin, Miroslav, Mičušik, Matej, Kleinova, Angela, Janigova, Ivica, Marković, Zoran M., Todorović-Marković, Biljana, "Simple route for the preparation of graphene/poly(styrene-b-butadiene-b-styrene) nanocomposite films with enhanced electrical conductivity and hydrophobicity" in Polymer International, 67, no. 8 (2018):1118-1127,
https://doi.org/10.1002/pi.5620 . .

TY  - JOUR
AU  - Sandoval, Stefania
AU  - Kepić, Dejan P.
AU  - Perez del Pino, Angel
AU  - Gyorgy, Eniko
AU  - Gomez, Andres
AU  - Pfannmoeller, Martin
AU  - Tendeloo, Gustaaf Van
AU  - Ballesteros, Belen
AU  - Tobias, Gerard
PY  - 2018
UR  - http://pubs.acs.org/doi/10.1021/acsnano.8b01638
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7933
AB  - The electronic and optical properties of two-dimensional layered materials allow the miniaturization of nanoelectronic and optoelectronic devices in a competitive manner. Even larger opportunities arise when two or more layers of different materials are combined. Here, we report on an ultrafast energy efficient strategy, using laser irradiation, which allows bulk synthesis of crystalline single-layered lead iodide in the cavities of carbon nanotubes by forming cylindrical van der Waals heterostructures. In contrast to the filling of van der Waals solids into carbon nanotubes by conventional thermal annealing, which favors the formation of inorganic nanowires, the present strategy is highly selective toward the growth of monolayers forming lead iodide nanotubes. The irradiated bulk material bearing the nanotubes reveals a decrease of the resistivity as well as a significant increase in the current flow upon illumination. Both effects are attributed to the presence of single-walled lead iodide nanotubes in the cavities of carbon nanotubes, which dominate the properties of the whole matrix. The present study brings in a simple, ultrafast and energy efficient strategy for the tailored synthesis of rolled-up single-layers of lead iodide (i.e., single-walled PbI2 nanotubes), which we believe could be expanded to other two-dimensional (2D) van der Waals solids. In fact, initial tests with ZnI2 already reveal the formation of single-walled ZnI2 nanotubes, thus proving the versatility of the approach.
T2  - ACS Nano
T1  - Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration
VL  - 12
IS  - 7
SP  - 6648
EP  - 6656
DO  - 10.1021/acsnano.8b01638
ER  - 

@article{
author = "Sandoval, Stefania and Kepić, Dejan P. and Perez del Pino, Angel and Gyorgy, Eniko and Gomez, Andres and Pfannmoeller, Martin and Tendeloo, Gustaaf Van and Ballesteros, Belen and Tobias, Gerard",
year = "2018",
abstract = "The electronic and optical properties of two-dimensional layered materials allow the miniaturization of nanoelectronic and optoelectronic devices in a competitive manner. Even larger opportunities arise when two or more layers of different materials are combined. Here, we report on an ultrafast energy efficient strategy, using laser irradiation, which allows bulk synthesis of crystalline single-layered lead iodide in the cavities of carbon nanotubes by forming cylindrical van der Waals heterostructures. In contrast to the filling of van der Waals solids into carbon nanotubes by conventional thermal annealing, which favors the formation of inorganic nanowires, the present strategy is highly selective toward the growth of monolayers forming lead iodide nanotubes. The irradiated bulk material bearing the nanotubes reveals a decrease of the resistivity as well as a significant increase in the current flow upon illumination. Both effects are attributed to the presence of single-walled lead iodide nanotubes in the cavities of carbon nanotubes, which dominate the properties of the whole matrix. The present study brings in a simple, ultrafast and energy efficient strategy for the tailored synthesis of rolled-up single-layers of lead iodide (i.e., single-walled PbI2 nanotubes), which we believe could be expanded to other two-dimensional (2D) van der Waals solids. In fact, initial tests with ZnI2 already reveal the formation of single-walled ZnI2 nanotubes, thus proving the versatility of the approach.",
journal = "ACS Nano",
title = "Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration",
volume = "12",
number = "7",
pages = "6648-6656",
doi = "10.1021/acsnano.8b01638"
}

Sandoval, S., Kepić, D. P., Perez del Pino, A., Gyorgy, E., Gomez, A., Pfannmoeller, M., Tendeloo, G. V., Ballesteros, B.,& Tobias, G.. (2018). Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration. in ACS Nano, 12(7), 6648-6656.
https://doi.org/10.1021/acsnano.8b01638

Sandoval S, Kepić DP, Perez del Pino A, Gyorgy E, Gomez A, Pfannmoeller M, Tendeloo GV, Ballesteros B, Tobias G. Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration. in ACS Nano. 2018;12(7):6648-6656.
doi:10.1021/acsnano.8b01638 .

Sandoval, Stefania, Kepić, Dejan P., Perez del Pino, Angel, Gyorgy, Eniko, Gomez, Andres, Pfannmoeller, Martin, Tendeloo, Gustaaf Van, Ballesteros, Belen, Tobias, Gerard, "Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration" in ACS Nano, 12, no. 7 (2018):6648-6656,
https://doi.org/10.1021/acsnano.8b01638 . .

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  - JOUR
AU  - Marković, Zoran M.
AU  - Kepić, Dejan P.
AU  - Matijašević, Danka M.
AU  - Pavlović, Vladimir B.
AU  - Jovanović, Svetlana P.
AU  - Stanković, Nenad K.
AU  - Milivojević, Dušan
AU  - Špitalsky, Zdenko
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Nikšić, Miomir 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 Matijašević, Danka M. and Pavlović, Vladimir B. and Jovanović, Svetlana P. and Stanković, Nenad K. and Milivojević, Dušan and Špitalsky, Zdenko and Holclajtner-Antunović, Ivanka D. and Bajuk-Bogdanović, Danica V. and Nikšić, Miomir 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., Matijašević, D. M., Pavlović, V. B., Jovanović, S. P., Stanković, N. K., Milivojević, D., Špitalsky, Z., Holclajtner-Antunović, I. D., Bajuk-Bogdanović, D. V., Nikšić, 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, Matijašević DM, Pavlović VB, Jovanović SP, Stanković NK, Milivojević D, Špitalsky Z, Holclajtner-Antunović ID, Bajuk-Bogdanović DV, Nikšić 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., Matijašević, Danka M., Pavlović, Vladimir B., Jovanović, Svetlana P., Stanković, Nenad K., Milivojević, Dušan, Špitalsky, Zdenko, Holclajtner-Antunović, Ivanka D., Bajuk-Bogdanović, Danica V., Nikšić, Miomir 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  - Kepić, Dejan P.
AU  - Sandoval, Stefania
AU  - Perez del Pino, Angel
AU  - Gyorgy, Eniko
AU  - Cabana, Laura
AU  - Ballesteros, Belen
AU  - Tobias, Gerard
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1358
AB  - N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at.% (UV wavelength at 60 mJ cm(-2) fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.
T2  - ChemPhysChem
T1  - Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions
VL  - 18
IS  - 8
SP  - 935
EP  - 941
DO  - 10.1002/cphc.201601256
ER  - 

@article{
author = "Kepić, Dejan P. and Sandoval, Stefania and Perez del Pino, Angel and Gyorgy, Eniko and Cabana, Laura and Ballesteros, Belen and Tobias, Gerard",
year = "2017",
abstract = "N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at.% (UV wavelength at 60 mJ cm(-2) fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.",
journal = "ChemPhysChem",
title = "Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions",
volume = "18",
number = "8",
pages = "935-941",
doi = "10.1002/cphc.201601256"
}

Kepić, D. P., Sandoval, S., Perez del Pino, A., Gyorgy, E., Cabana, L., Ballesteros, B.,& Tobias, G.. (2017). Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions. in ChemPhysChem, 18(8), 935-941.
https://doi.org/10.1002/cphc.201601256

Kepić DP, Sandoval S, Perez del Pino A, Gyorgy E, Cabana L, Ballesteros B, Tobias G. Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions. in ChemPhysChem. 2017;18(8):935-941.
doi:10.1002/cphc.201601256 .

Kepić, Dejan P., Sandoval, Stefania, Perez del Pino, Angel, Gyorgy, Eniko, Cabana, Laura, Ballesteros, Belen, Tobias, Gerard, "Nanosecond Laser-Assisted Nitrogen Doping of Graphene Oxide Dispersions" in ChemPhysChem, 18, no. 8 (2017):935-941,
https://doi.org/10.1002/cphc.201601256 . .

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  - 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  - Jovanović, Svetlana P.
AU  - Syrgiannis, Zois
AU  - Marković, Zoran M.
AU  - Bonasera, Aurelio
AU  - Kepić, Dejan P.
AU  - Budimir, Milica
AU  - Milivojević, Dušan
AU  - Spasojević, Vuk D.
AU  - Dramićanin, Miroslav
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/839
AB  - Herein, the ability of gamma irradiation to enhance the photoluminescence properties of graphene quantum dots (GQDs) was investigated. Different doses of gamma-irradiation were used on GQDs to examine the way in which their structure and optical properties can be affected. The photoluminescence quantum yield was increased six times for the GQDs irradiated with high doses compared to the nonirradiated material. Both photoluminescence lifetime and values of optical band gap were increased with the dose of applied gamma irradiation. In addition, the exploitation of the gamma-irradiated GQDs as photosensitizers was examined by monitoring the production of singlet oxygen under UV illumination. The main outcome was that the GQDs irradiated at lower doses act as better photoproducers than the ones irradiated at higher doses. These results corroborate that the structural changes caused by gamma irradiation have a direct impact on GQD ability to produce singlet oxygen and their photostability under prolonged UV illumination. This makes low-dose irradiated GQDs promising candidates for photodynamic therapy.
PB  - American Chemical Society
T2  - ACS Applied Materials and Interfaces
T1  - Modification of Structural and Luminescence Properties of Graphene Quantum Dots by Gamma Irradiation and Their Application in a Photodynamic Therapy
VL  - 7
IS  - 46
SP  - 25865
EP  - 25874
DO  - 10.1021/acsami.5b08226
ER  - 

@article{
author = "Jovanović, Svetlana P. and Syrgiannis, Zois and Marković, Zoran M. and Bonasera, Aurelio and Kepić, Dejan P. and Budimir, Milica and Milivojević, Dušan and Spasojević, Vuk D. and Dramićanin, Miroslav and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2015",
abstract = "Herein, the ability of gamma irradiation to enhance the photoluminescence properties of graphene quantum dots (GQDs) was investigated. Different doses of gamma-irradiation were used on GQDs to examine the way in which their structure and optical properties can be affected. The photoluminescence quantum yield was increased six times for the GQDs irradiated with high doses compared to the nonirradiated material. Both photoluminescence lifetime and values of optical band gap were increased with the dose of applied gamma irradiation. In addition, the exploitation of the gamma-irradiated GQDs as photosensitizers was examined by monitoring the production of singlet oxygen under UV illumination. The main outcome was that the GQDs irradiated at lower doses act as better photoproducers than the ones irradiated at higher doses. These results corroborate that the structural changes caused by gamma irradiation have a direct impact on GQD ability to produce singlet oxygen and their photostability under prolonged UV illumination. This makes low-dose irradiated GQDs promising candidates for photodynamic therapy.",
publisher = "American Chemical Society",
journal = "ACS Applied Materials and Interfaces",
title = "Modification of Structural and Luminescence Properties of Graphene Quantum Dots by Gamma Irradiation and Their Application in a Photodynamic Therapy",
volume = "7",
number = "46",
pages = "25865-25874",
doi = "10.1021/acsami.5b08226"
}

Jovanović, S. P., Syrgiannis, Z., Marković, Z. M., Bonasera, A., Kepić, D. P., Budimir, M., Milivojević, D., Spasojević, V. D., Dramićanin, M., Pavlović, V. B.,& Todorović-Marković, B.. (2015). Modification of Structural and Luminescence Properties of Graphene Quantum Dots by Gamma Irradiation and Their Application in a Photodynamic Therapy. in ACS Applied Materials and Interfaces
American Chemical Society., 7(46), 25865-25874.
https://doi.org/10.1021/acsami.5b08226

Jovanović SP, Syrgiannis Z, Marković ZM, Bonasera A, Kepić DP, Budimir M, Milivojević D, Spasojević VD, Dramićanin M, Pavlović VB, Todorović-Marković B. Modification of Structural and Luminescence Properties of Graphene Quantum Dots by Gamma Irradiation and Their Application in a Photodynamic Therapy. in ACS Applied Materials and Interfaces. 2015;7(46):25865-25874.
doi:10.1021/acsami.5b08226 .

Jovanović, Svetlana P., Syrgiannis, Zois, Marković, Zoran M., Bonasera, Aurelio, Kepić, Dejan P., Budimir, Milica, Milivojević, Dušan, Spasojević, Vuk D., Dramićanin, Miroslav, Pavlović, Vladimir B., Todorović-Marković, Biljana, "Modification of Structural and Luminescence Properties of Graphene Quantum Dots by Gamma Irradiation and Their Application in a Photodynamic Therapy" in ACS Applied Materials and Interfaces, 7, no. 46 (2015):25865-25874,
https://doi.org/10.1021/acsami.5b08226 . .

TY  - JOUR
AU  - Cabana, Laura
AU  - Ke, Xiaoxing
AU  - Kepić, Dejan P.
AU  - Oro-Sole, Judith
AU  - Tobias-Rossell, Ester
AU  - Tendeloo, Gustaaf Van
AU  - Tobias, Gerard
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/712
AB  - Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 mu m have been prepared with the reported methodology while preserving the integrity of the tubular wall structure. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes
VL  - 93
SP  - 1059
EP  - 1067
DO  - 10.1016/j.carbon.2015.06.027
ER  - 

@article{
author = "Cabana, Laura and Ke, Xiaoxing and Kepić, Dejan P. and Oro-Sole, Judith and Tobias-Rossell, Ester and Tendeloo, Gustaaf Van and Tobias, Gerard",
year = "2015",
abstract = "Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 mu m have been prepared with the reported methodology while preserving the integrity of the tubular wall structure. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes",
volume = "93",
pages = "1059-1067",
doi = "10.1016/j.carbon.2015.06.027"
}

Cabana, L., Ke, X., Kepić, D. P., Oro-Sole, J., Tobias-Rossell, E., Tendeloo, G. V.,& Tobias, G.. (2015). The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes. in Carbon, 93, 1059-1067.
https://doi.org/10.1016/j.carbon.2015.06.027

Cabana L, Ke X, Kepić DP, Oro-Sole J, Tobias-Rossell E, Tendeloo GV, Tobias G. The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes. in Carbon. 2015;93:1059-1067.
doi:10.1016/j.carbon.2015.06.027 .

Cabana, Laura, Ke, Xiaoxing, Kepić, Dejan P., Oro-Sole, Judith, Tobias-Rossell, Ester, Tendeloo, Gustaaf Van, Tobias, Gerard, "The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes" in Carbon, 93 (2015):1059-1067,
https://doi.org/10.1016/j.carbon.2015.06.027 . .

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  - 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  - Peruško, Davor
AU  - Budimir, Milica
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/305
AB  - Enhanced conductivity, transparency and stability are the most important factors to consider in order to prepare electrodes for optoelectronic devices. In this paper, we investigated the properties of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films doped with graphene and graphene quantum dots. Samples were deposited by spin-coating onto glass substrates. Thin films were characterized by UV-vis and Raman spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and four-point probe measurements. It was found that both graphene and graphene quantum dots improve the conductivity of PEDOT:PSS films with only small decrease in transparency. AFM and SEM analysis showed homogenous distribution of spherical nanoparticles of graphene quantum dots and irregular shaped nanoparticles of graphene in PEDOT:PSS. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Synthetic Metals
T1  - Preparation of PEDOT:PSS thin films doped with graphene and graphene quantum dots
VL  - 198
SP  - 150
EP  - 154
DO  - 10.1016/j.synthmet.2014.10.017
ER  - 

@article{
author = "Kepić, Dejan P. and Marković, Zoran M. and Jovanović, Svetlana P. and Peruško, Davor and Budimir, Milica and Holclajtner-Antunović, Ivanka D. and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2014",
abstract = "Enhanced conductivity, transparency and stability are the most important factors to consider in order to prepare electrodes for optoelectronic devices. In this paper, we investigated the properties of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films doped with graphene and graphene quantum dots. Samples were deposited by spin-coating onto glass substrates. Thin films were characterized by UV-vis and Raman spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and four-point probe measurements. It was found that both graphene and graphene quantum dots improve the conductivity of PEDOT:PSS films with only small decrease in transparency. AFM and SEM analysis showed homogenous distribution of spherical nanoparticles of graphene quantum dots and irregular shaped nanoparticles of graphene in PEDOT:PSS. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Synthetic Metals",
title = "Preparation of PEDOT:PSS thin films doped with graphene and graphene quantum dots",
volume = "198",
pages = "150-154",
doi = "10.1016/j.synthmet.2014.10.017"
}

Kepić, D. P., Marković, Z. M., Jovanović, S. P., Peruško, D., Budimir, M., Holclajtner-Antunović, I. D., Pavlović, V. B.,& Todorović-Marković, B.. (2014). Preparation of PEDOT:PSS thin films doped with graphene and graphene quantum dots. in Synthetic Metals, 198, 150-154.
https://doi.org/10.1016/j.synthmet.2014.10.017

Kepić DP, Marković ZM, Jovanović SP, Peruško D, Budimir M, Holclajtner-Antunović ID, Pavlović VB, Todorović-Marković B. Preparation of PEDOT:PSS thin films doped with graphene and graphene quantum dots. in Synthetic Metals. 2014;198:150-154.
doi:10.1016/j.synthmet.2014.10.017 .

Kepić, Dejan P., Marković, Zoran M., Jovanović, Svetlana P., Peruško, Davor, Budimir, Milica, Holclajtner-Antunović, Ivanka D., Pavlović, Vladimir B., Todorović-Marković, Biljana, "Preparation of PEDOT:PSS thin films doped with graphene and graphene quantum dots" in Synthetic Metals, 198 (2014):150-154,
https://doi.org/10.1016/j.synthmet.2014.10.017 . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Marković, Zoran M.
AU  - Tošić, Dragana
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Adnađević, Borivoj
AU  - Prekodravac, Jovana
AU  - Kleut, Duška
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7022
AB  - In this work, we present the results of a Raman spectroscopy study of single-wall carbon nanotube (SWCNT) thin films treated with microwave irradiation. SWCNT thin films were deposited by the vacuum filtration method and transferred onto alumina substrate. These thin films were exposed to microwave irradiation of 25 and 250 W at 2.45 GHz. All samples were characterized by Raman spectroscopy and atomic force microscopy. Raman spectroscopy analysis showed that there was neither selective destruction of metallic nor semiconducting nanotubes. It was noticed that samples were heated only during microwave irradiation at 250 W. The major effect of microwave irradiation on SWCNTs was their debundling.
T2  - Physica Scripta
T1  - Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study
VL  - T157
DO  - 10.1088/0031-8949/2013/T157/014040
ER  - 

@article{
author = "Kepić, Dejan P. and Marković, Zoran M. and Tošić, Dragana and Holclajtner-Antunović, Ivanka D. and Adnađević, Borivoj and Prekodravac, Jovana and Kleut, Duška and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2013",
abstract = "In this work, we present the results of a Raman spectroscopy study of single-wall carbon nanotube (SWCNT) thin films treated with microwave irradiation. SWCNT thin films were deposited by the vacuum filtration method and transferred onto alumina substrate. These thin films were exposed to microwave irradiation of 25 and 250 W at 2.45 GHz. All samples were characterized by Raman spectroscopy and atomic force microscopy. Raman spectroscopy analysis showed that there was neither selective destruction of metallic nor semiconducting nanotubes. It was noticed that samples were heated only during microwave irradiation at 250 W. The major effect of microwave irradiation on SWCNTs was their debundling.",
journal = "Physica Scripta",
title = "Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study",
volume = "T157",
doi = "10.1088/0031-8949/2013/T157/014040"
}

Kepić, D. P., Marković, Z. M., Tošić, D., Holclajtner-Antunović, I. D., Adnađević, B., Prekodravac, J., Kleut, D., Dramićanin, M.,& Todorović-Marković, B.. (2013). Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study. in Physica Scripta, T157.
https://doi.org/10.1088/0031-8949/2013/T157/014040

Kepić DP, Marković ZM, Tošić D, Holclajtner-Antunović ID, Adnađević B, Prekodravac J, Kleut D, Dramićanin M, Todorović-Marković B. Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study. in Physica Scripta. 2013;T157.
doi:10.1088/0031-8949/2013/T157/014040 .

Kepić, Dejan P., Marković, Zoran M., Tošić, Dragana, Holclajtner-Antunović, Ivanka D., Adnađević, Borivoj, Prekodravac, Jovana, Kleut, Duška, Dramićanin, Miroslav, Todorović-Marković, Biljana, "Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study" in Physica Scripta, T157 (2013),
https://doi.org/10.1088/0031-8949/2013/T157/014040 . .

TY  - THES
AU  - Kepić, Dejan P.
PY  - 2013
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=898
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:7409/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=44738831
UR  - http://nardus.mpn.gov.rs/123456789/3014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7260
AB  - Резиме: Утицај електромагнетног зрачења на једнослојне угљеничне нанотубе јепредмет интензивног проучавања. У оквиру ове докторске дисертације испитаноје дејство електромагнетног зрачења из видљиве, инфрацрвене и микроталаснеобласти на танке слојеве једнослојних угљеничних нанотуба депонованихвакуумском филтрацијом. У оквиру дисертације су коришћене нанотубе двапроизвођача, које су добијене методом хемијске депозиције из парне фазе али узупотребу различитог катализатора. Танки слојеви угљеничних нанотубадепоновани методом вакуумске филтрације су испитани раманскомспектроскопијом помоћу три ексцитациона ласера: 532, 633 и 780 nm имикроскопијом атомских сила. Установљено је да 532 nm ласер испитује стање наповршини узорка, док са друге стране ласер на 780 nm испитује целу запреминуузорка. Последице озрачивања ОПО ласером различитих таласних дужина изобласти видљивог зрачења су декомпозиција, фотооксидација и издвајање изснопова. Издвајање из снопова и уклањање угљеничних нечистоћа се јављајунакон динамичке оксидације. Осим тога, приликом динамичке оксидације можедоћи до сагоревања нанотуба мањих пречника. Изотермална оксидација имаразличит утицај на нанотубе коришћене у склопу ове дисертације, што јепоследица различитих катализатора коришћених за време синтезе. Озрачивањемикроталасима изазива повећање температуре узорка током озрачивања, али недоводи до селективне деструкције једног типа нанотуба. Дејство микроталаса наструктуру угљеничних нанотуба се махом манифестује у издвајању појединихнанотуба из снопова.
AB  - The influence of electromagnetic waves upon single wall carbon nanotube isthe subject of great scientific interest. In this PhD thesis a detailed study of the influenceof electromаgnetic radiation from visible, infrared and microwave regions upon thinfilms of single wall carbon nanotubes prepared by vacuum filtration is presented. In thisPhD thesis carbon nanotubes from two different suppliers were used; both weresynthesized by chemical vapor deposition method but with different catalyst. Thin filmsof carbon nanotubes deposited by vacuum filtration method are characterized by Ramanspectroscopy using three excitation lines: 532, 633 and 780 nm and by atomic forcemicroscopy. It was established that the 532 nm excitation line probes the surface ofnanotube films, while the 780 nm excitation line probes the bulk of films. The effects ofOPO laser with radiation of different wavelengths upon thin films of carbon nanotubesare decomposition, photooxidation and debundling. Debundling and deffective carbonremoval is the major effect of dynamic oxidation. Also, dynamic oxidation can causethe removal of small diameter nanotubes. Isothermal oxidation causes different effectson carbon nanotubes from different suppliers, which is the consequence of the catalystsused during synthesis. Microwave irradiation upon carbon nanotubes results intemperature increase of the samples during irradiation, but selective destruction of onetype of SWCNT was not observed. Major effect of microwave irradiation wasdebundling.
PB  - Универзитет у Београду, Факултет за физичку хемију
T2  - Универзитет у Београду
T1  - Модификација једнослојних угљеничних нанотуба електромагнетним зрачењем из видљиве, инфрацрвене и микроталасне области
T1  - Modification of single wall carbon nanotubes by electromagnetic radiation from the visible, infrared and microwave spectra
UR  - https://hdl.handle.net/21.15107/rcub_nardus_3014
ER  - 

@phdthesis{
author = "Kepić, Dejan P.",
year = "2013",
abstract = "Резиме: Утицај електромагнетног зрачења на једнослојне угљеничне нанотубе јепредмет интензивног проучавања. У оквиру ове докторске дисертације испитаноје дејство електромагнетног зрачења из видљиве, инфрацрвене и микроталаснеобласти на танке слојеве једнослојних угљеничних нанотуба депонованихвакуумском филтрацијом. У оквиру дисертације су коришћене нанотубе двапроизвођача, које су добијене методом хемијске депозиције из парне фазе али узупотребу различитог катализатора. Танки слојеви угљеничних нанотубадепоновани методом вакуумске филтрације су испитани раманскомспектроскопијом помоћу три ексцитациона ласера: 532, 633 и 780 nm имикроскопијом атомских сила. Установљено је да 532 nm ласер испитује стање наповршини узорка, док са друге стране ласер на 780 nm испитује целу запреминуузорка. Последице озрачивања ОПО ласером различитих таласних дужина изобласти видљивог зрачења су декомпозиција, фотооксидација и издвајање изснопова. Издвајање из снопова и уклањање угљеничних нечистоћа се јављајунакон динамичке оксидације. Осим тога, приликом динамичке оксидације можедоћи до сагоревања нанотуба мањих пречника. Изотермална оксидација имаразличит утицај на нанотубе коришћене у склопу ове дисертације, што јепоследица различитих катализатора коришћених за време синтезе. Озрачивањемикроталасима изазива повећање температуре узорка током озрачивања, али недоводи до селективне деструкције једног типа нанотуба. Дејство микроталаса наструктуру угљеничних нанотуба се махом манифестује у издвајању појединихнанотуба из снопова., The influence of electromagnetic waves upon single wall carbon nanotube isthe subject of great scientific interest. In this PhD thesis a detailed study of the influenceof electromаgnetic radiation from visible, infrared and microwave regions upon thinfilms of single wall carbon nanotubes prepared by vacuum filtration is presented. In thisPhD thesis carbon nanotubes from two different suppliers were used; both weresynthesized by chemical vapor deposition method but with different catalyst. Thin filmsof carbon nanotubes deposited by vacuum filtration method are characterized by Ramanspectroscopy using three excitation lines: 532, 633 and 780 nm and by atomic forcemicroscopy. It was established that the 532 nm excitation line probes the surface ofnanotube films, while the 780 nm excitation line probes the bulk of films. The effects ofOPO laser with radiation of different wavelengths upon thin films of carbon nanotubesare decomposition, photooxidation and debundling. Debundling and deffective carbonremoval is the major effect of dynamic oxidation. Also, dynamic oxidation can causethe removal of small diameter nanotubes. Isothermal oxidation causes different effectson carbon nanotubes from different suppliers, which is the consequence of the catalystsused during synthesis. Microwave irradiation upon carbon nanotubes results intemperature increase of the samples during irradiation, but selective destruction of onetype of SWCNT was not observed. Major effect of microwave irradiation wasdebundling.",
publisher = "Универзитет у Београду, Факултет за физичку хемију",
journal = "Универзитет у Београду",
title = "Модификација једнослојних угљеничних нанотуба електромагнетним зрачењем из видљиве, инфрацрвене и микроталасне области, Modification of single wall carbon nanotubes by electromagnetic radiation from the visible, infrared and microwave spectra",
url = "https://hdl.handle.net/21.15107/rcub_nardus_3014"
}

Kepić, D. P.. (2013). Модификација једнослојних угљеничних нанотуба електромагнетним зрачењем из видљиве, инфрацрвене и микроталасне области. in Универзитет у Београду
Универзитет у Београду, Факултет за физичку хемију..
https://hdl.handle.net/21.15107/rcub_nardus_3014

Kepić DP. Модификација једнослојних угљеничних нанотуба електромагнетним зрачењем из видљиве, инфрацрвене и микроталасне области. in Универзитет у Београду. 2013;.
https://hdl.handle.net/21.15107/rcub_nardus_3014 .

Kepić, Dejan P., "Модификација једнослојних угљеничних нанотуба електромагнетним зрачењем из видљиве, инфрацрвене и микроталасне области" in Универзитет у Београду (2013),
https://hdl.handle.net/21.15107/rcub_nardus_3014 .