TY  - CONF
AU  - Carević, Milica
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Čomor, Mirjana
AU  - Vulić, T.
AU  - Otoničar, Mojca
AU  - Abazović, Nadica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12533
AB  - Two different synthetic routes were employed to modify surface of graphitic carbon nitride (g- CN) with copper nanoparticles (CuNPs). Structure, morphology and CuNPs distribution on presynthesized g-CN surface are characterized by FT-IR, XRD and TEM. Results suggested that the simpler method based on mixing of precursors in inert atmosphere and room temperature, resulted in better CuNPs distribution compared to method which used refluxing as a step in synthesis.
PB  - Hungary : University of Szeged
C3  - 29th International Symposium on Analytical and Environmental Problems : Proceedings
T1  - Surface modification of graphitic carbon nitride with copper nanoparticles
SP  - 113
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12533
ER  - 

@conference{
author = "Carević, Milica and Stamenović, Una and Vodnik, Vesna and Čomor, Mirjana and Vulić, T. and Otoničar, Mojca and Abazović, Nadica",
year = "2023",
abstract = "Two different synthetic routes were employed to modify surface of graphitic carbon nitride (g- CN) with copper nanoparticles (CuNPs). Structure, morphology and CuNPs distribution on presynthesized g-CN surface are characterized by FT-IR, XRD and TEM. Results suggested that the simpler method based on mixing of precursors in inert atmosphere and room temperature, resulted in better CuNPs distribution compared to method which used refluxing as a step in synthesis.",
publisher = "Hungary : University of Szeged",
journal = "29th International Symposium on Analytical and Environmental Problems : Proceedings",
title = "Surface modification of graphitic carbon nitride with copper nanoparticles",
pages = "113-116",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12533"
}

Carević, M., Stamenović, U., Vodnik, V., Čomor, M., Vulić, T., Otoničar, M.,& Abazović, N.. (2023). Surface modification of graphitic carbon nitride with copper nanoparticles. in 29th International Symposium on Analytical and Environmental Problems : Proceedings
Hungary : University of Szeged., 113-116.
https://hdl.handle.net/21.15107/rcub_vinar_12533

Carević M, Stamenović U, Vodnik V, Čomor M, Vulić T, Otoničar M, Abazović N. Surface modification of graphitic carbon nitride with copper nanoparticles. in 29th International Symposium on Analytical and Environmental Problems : Proceedings. 2023;:113-116.
https://hdl.handle.net/21.15107/rcub_vinar_12533 .

Carević, Milica, Stamenović, Una, Vodnik, Vesna, Čomor, Mirjana, Vulić, T., Otoničar, Mojca, Abazović, Nadica, "Surface modification of graphitic carbon nitride with copper nanoparticles" in 29th International Symposium on Analytical and Environmental Problems : Proceedings (2023):113-116,
https://hdl.handle.net/21.15107/rcub_vinar_12533 .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Vukoje, Ivana
AU  - Tadić, Julijana
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
AU  - Radosavljević, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12226
PB  - Niš : RAD Centre
C3  - RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
T1  - Gamma irradiation-induced synthesis and characterization of bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposites
SP  - 85
EP  - 85
DO  - 10.21175/rad.abstr.book.2023.19.6
ER  - 

@conference{
author = "Nikolić, Nikolina and Spasojević, Jelena and Stamenović, Una and Vukoje, Ivana and Tadić, Julijana and Vodnik, Vesna and Kačarević-Popović, Zorica and Radosavljević, Aleksandra",
year = "2023",
publisher = "Niš : RAD Centre",
journal = "RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts",
title = "Gamma irradiation-induced synthesis and characterization of bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposites",
pages = "85-85",
doi = "10.21175/rad.abstr.book.2023.19.6"
}

Nikolić, N., Spasojević, J., Stamenović, U., Vukoje, I., Tadić, J., Vodnik, V., Kačarević-Popović, Z.,& Radosavljević, A.. (2023). Gamma irradiation-induced synthesis and characterization of bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposites. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
Niš : RAD Centre., 85-85.
https://doi.org/10.21175/rad.abstr.book.2023.19.6

Nikolić N, Spasojević J, Stamenović U, Vukoje I, Tadić J, Vodnik V, Kačarević-Popović Z, Radosavljević A. Gamma irradiation-induced synthesis and characterization of bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposites. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts. 2023;:85-85.
doi:10.21175/rad.abstr.book.2023.19.6 .

Nikolić, Nikolina, Spasojević, Jelena, Stamenović, Una, Vukoje, Ivana, Tadić, Julijana, Vodnik, Vesna, Kačarević-Popović, Zorica, Radosavljević, Aleksandra, "Gamma irradiation-induced synthesis and characterization of bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposites" in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts (2023):85-85,
https://doi.org/10.21175/rad.abstr.book.2023.19.6 . .

TY  - JOUR
AU  - Mašojević, Dijana
AU  - Stamenović, Una
AU  - Otoničar, Mojca
AU  - Davidović, Slađana
AU  - Škapin, Srečo Davor
AU  - Barudžija, Tanja
AU  - Vodnik, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10657
AB  - A novel and effective antibacterial agent based on a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By using a straightforward in situ polymerization method in water, a copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout a granular PPy matrix, was characterized and subjected to determination of antibacterial activity toward E. coli, and S. aureus. In this survey, the synergistic engagement of various features of CuNPs and PPy against bacteria was somewhat expected. After a 24 h interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17 % bacterial growth inhibition, while 10 ppm has a cidal value of 99.99 % at the same time. Safe and environmentally acceptable concentrations of Cu/PPy indicate that it is convenient as an antibacterial agent for wider use.
T2  - Materials Letters
T1  - Evaluation of the antibacterial effectiveness of novel copper/polypyrrole nanocomposite
VL  - 338
SP  - 134051
DO  - 10.1016/j.matlet.2023.134051
ER  - 

@article{
author = "Mašojević, Dijana and Stamenović, Una and Otoničar, Mojca and Davidović, Slađana and Škapin, Srečo Davor and Barudžija, Tanja and Vodnik, Vesna",
year = "2023",
abstract = "A novel and effective antibacterial agent based on a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By using a straightforward in situ polymerization method in water, a copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout a granular PPy matrix, was characterized and subjected to determination of antibacterial activity toward E. coli, and S. aureus. In this survey, the synergistic engagement of various features of CuNPs and PPy against bacteria was somewhat expected. After a 24 h interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17 % bacterial growth inhibition, while 10 ppm has a cidal value of 99.99 % at the same time. Safe and environmentally acceptable concentrations of Cu/PPy indicate that it is convenient as an antibacterial agent for wider use.",
journal = "Materials Letters",
title = "Evaluation of the antibacterial effectiveness of novel copper/polypyrrole nanocomposite",
volume = "338",
pages = "134051",
doi = "10.1016/j.matlet.2023.134051"
}

Mašojević, D., Stamenović, U., Otoničar, M., Davidović, S., Škapin, S. D., Barudžija, T.,& Vodnik, V.. (2023). Evaluation of the antibacterial effectiveness of novel copper/polypyrrole nanocomposite. in Materials Letters, 338, 134051.
https://doi.org/10.1016/j.matlet.2023.134051

Mašojević D, Stamenović U, Otoničar M, Davidović S, Škapin SD, Barudžija T, Vodnik V. Evaluation of the antibacterial effectiveness of novel copper/polypyrrole nanocomposite. in Materials Letters. 2023;338:134051.
doi:10.1016/j.matlet.2023.134051 .

Mašojević, Dijana, Stamenović, Una, Otoničar, Mojca, Davidović, Slađana, Škapin, Srečo Davor, Barudžija, Tanja, Vodnik, Vesna, "Evaluation of the antibacterial effectiveness of novel copper/polypyrrole nanocomposite" in Materials Letters, 338 (2023):134051,
https://doi.org/10.1016/j.matlet.2023.134051 . .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Otoničar, Mojca
AU  - Škapin, Srečo Davor
AU  - Šljukić, Biljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11203
AB  - The catalytic activity of five silver-polyaniline-polyvinylpyrrolidone (Ag@PANI@PVP1–5) nanocomposites for borohydride oxidation reaction (BOR) was thoroughly examined. The nanocomposites were synthesized by an in situ chemical oxidative polymerization of aniline monomer by Ag+ ions in the presence of accelerator – PVP and physicochemical properties were determined prior their use in electrocatalysis. Ag@PANI@PVP3 with 35.4 wt% Ag delivered the highest current density and specific current density during BOR. Evaluation of the order of reaction < 1 suggested indirect BOR mechanism. Furthermore, Ag@PANI@PVP3 also delivered the highest current density and stable performance during chronoamperometric study of BOR. Its apparent activation energy of 15 kJ mol−1 was found to be the lowest among the studied materials accounting for the high current densities. © 2023 The Author(s)
T2  - Molecular Catalysis
T1  - Combining silver, polyaniline and polyvinylpyrrolidone for efficient electrocatalysis of borohydride oxidation reaction
VL  - 547
DO  - 10.1016/j.mcat.2023.113310
ER  - 

@article{
author = "Milikić, Jadranka and Stamenović, Una and Vodnik, Vesna and Otoničar, Mojca and Škapin, Srečo Davor and Šljukić, Biljana",
year = "2023",
abstract = "The catalytic activity of five silver-polyaniline-polyvinylpyrrolidone (Ag@PANI@PVP1–5) nanocomposites for borohydride oxidation reaction (BOR) was thoroughly examined. The nanocomposites were synthesized by an in situ chemical oxidative polymerization of aniline monomer by Ag+ ions in the presence of accelerator – PVP and physicochemical properties were determined prior their use in electrocatalysis. Ag@PANI@PVP3 with 35.4 wt% Ag delivered the highest current density and specific current density during BOR. Evaluation of the order of reaction < 1 suggested indirect BOR mechanism. Furthermore, Ag@PANI@PVP3 also delivered the highest current density and stable performance during chronoamperometric study of BOR. Its apparent activation energy of 15 kJ mol−1 was found to be the lowest among the studied materials accounting for the high current densities. © 2023 The Author(s)",
journal = "Molecular Catalysis",
title = "Combining silver, polyaniline and polyvinylpyrrolidone for efficient electrocatalysis of borohydride oxidation reaction",
volume = "547",
doi = "10.1016/j.mcat.2023.113310"
}

Milikić, J., Stamenović, U., Vodnik, V., Otoničar, M., Škapin, S. D.,& Šljukić, B.. (2023). Combining silver, polyaniline and polyvinylpyrrolidone for efficient electrocatalysis of borohydride oxidation reaction. in Molecular Catalysis, 547.
https://doi.org/10.1016/j.mcat.2023.113310

Milikić J, Stamenović U, Vodnik V, Otoničar M, Škapin SD, Šljukić B. Combining silver, polyaniline and polyvinylpyrrolidone for efficient electrocatalysis of borohydride oxidation reaction. in Molecular Catalysis. 2023;547.
doi:10.1016/j.mcat.2023.113310 .

Milikić, Jadranka, Stamenović, Una, Vodnik, Vesna, Otoničar, Mojca, Škapin, Srečo Davor, Šljukić, Biljana, "Combining silver, polyaniline and polyvinylpyrrolidone for efficient electrocatalysis of borohydride oxidation reaction" in Molecular Catalysis, 547 (2023),
https://doi.org/10.1016/j.mcat.2023.113310 . .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Vukoje, Ivana
AU  - Kačarević-Popović, Zorica
AU  - Radosavljević, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12325
AB  - In recent years, the need for innovative materials has produced remarkable progress in the field of smart materials, with a particular focus on nanocomposite systems containing crosslinked polymer matrices (hydrogels) and metal nanoparticles. Hydrogels have become a crucial class of biomaterials due to their stable 3D porous structures, high fluid absorption capacity, similarity to biological tissues, and biocompatibility. Of particular interest are hydrogels with the ability to respond to various external stimuli (temperature, pH, light etc.), resulting in alterations of their physical and chemical characteristics. Our research focuses on the nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) hydrogels and gold nanoparticles (AuNPs), with a unique emphasis on exploring the specific properties of single-layer and bi-layered systems. The insights gained from this comparative study open new possibilities for applications in drug delivery, sensors, and soft robotics. Single-layer systems consisting of active PNiPAAm hydrogel and AuNPs, were created through a combination of radiolytic and chemical procedures. Bi-layered systems feature an active Au-PNiPAAm layer, with the addition of a passive poly(vinyl alcohol) (PVA) hydrogel layer, crosslinked by the combination of freeze-thaw and radiolytic techniques. In both cases, the incorporation of spherical AuNPs within an active layer was confirmed by the presence of a characteristic surface plasmon resonance (SPR), while scanning electron microscopy (SEM) indicated the system's highly porous structure. The physicochemical properties of both single- and bi-layered systems involved the examination of their swelling and deswelling properties, as well as the volume phase transition temperature (VPTT). The incorporation of AuNPs in the PNiPAAm layer led to an increase in both swelling capacity and VPTT. Compression measurements showed that the presence of a passive layer and AuNPs significantly improved mechanical properties of nanocomposites.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Improvement of Au-poly(N-isopropylacrylamide) hydrogel nanocomposites: Singlelayer vs. bi-layered systems
SP  - 54
EP  - 54
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12325
ER  - 

@conference{
author = "Nikolić, Nikolina and Spasojević, Jelena and Stamenović, Una and Vodnik, Vesna and Vukoje, Ivana and Kačarević-Popović, Zorica and Radosavljević, Aleksandra",
year = "2023",
abstract = "In recent years, the need for innovative materials has produced remarkable progress in the field of smart materials, with a particular focus on nanocomposite systems containing crosslinked polymer matrices (hydrogels) and metal nanoparticles. Hydrogels have become a crucial class of biomaterials due to their stable 3D porous structures, high fluid absorption capacity, similarity to biological tissues, and biocompatibility. Of particular interest are hydrogels with the ability to respond to various external stimuli (temperature, pH, light etc.), resulting in alterations of their physical and chemical characteristics. Our research focuses on the nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) hydrogels and gold nanoparticles (AuNPs), with a unique emphasis on exploring the specific properties of single-layer and bi-layered systems. The insights gained from this comparative study open new possibilities for applications in drug delivery, sensors, and soft robotics. Single-layer systems consisting of active PNiPAAm hydrogel and AuNPs, were created through a combination of radiolytic and chemical procedures. Bi-layered systems feature an active Au-PNiPAAm layer, with the addition of a passive poly(vinyl alcohol) (PVA) hydrogel layer, crosslinked by the combination of freeze-thaw and radiolytic techniques. In both cases, the incorporation of spherical AuNPs within an active layer was confirmed by the presence of a characteristic surface plasmon resonance (SPR), while scanning electron microscopy (SEM) indicated the system's highly porous structure. The physicochemical properties of both single- and bi-layered systems involved the examination of their swelling and deswelling properties, as well as the volume phase transition temperature (VPTT). The incorporation of AuNPs in the PNiPAAm layer led to an increase in both swelling capacity and VPTT. Compression measurements showed that the presence of a passive layer and AuNPs significantly improved mechanical properties of nanocomposites.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Improvement of Au-poly(N-isopropylacrylamide) hydrogel nanocomposites: Singlelayer vs. bi-layered systems",
pages = "54-54",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12325"
}

Nikolić, N., Spasojević, J., Stamenović, U., Vodnik, V., Vukoje, I., Kačarević-Popović, Z.,& Radosavljević, A.. (2023). Improvement of Au-poly(N-isopropylacrylamide) hydrogel nanocomposites: Singlelayer vs. bi-layered systems. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 54-54.
https://hdl.handle.net/21.15107/rcub_vinar_12325

Nikolić N, Spasojević J, Stamenović U, Vodnik V, Vukoje I, Kačarević-Popović Z, Radosavljević A. Improvement of Au-poly(N-isopropylacrylamide) hydrogel nanocomposites: Singlelayer vs. bi-layered systems. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:54-54.
https://hdl.handle.net/21.15107/rcub_vinar_12325 .

Nikolić, Nikolina, Spasojević, Jelena, Stamenović, Una, Vodnik, Vesna, Vukoje, Ivana, Kačarević-Popović, Zorica, Radosavljević, Aleksandra, "Improvement of Au-poly(N-isopropylacrylamide) hydrogel nanocomposites: Singlelayer vs. bi-layered systems" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):54-54,
https://hdl.handle.net/21.15107/rcub_vinar_12325 .

TY  - CONF
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Mašojević, Dijana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12534
AB  - A special group of functional materials with advanced features and accordingly promising applications are the nanocomposites of the metal nanoparticles (MNPs) - gold (Au), silver (Ag), and copper (Cu) and intrinsically conductive polymers - polyaniline and polypyrrole [1-7]. Thanks to the characteristics of these MNPs such as tunability of the plasmon resonance through variation of their size, shape, and composition, in combination with polymers, it is possible to create nanocomposites for specific biomedical and catalytic use as a variety of biological/catalytic processes occurring at nanometer scale. These processes are also related to the surface effects of the MNPs, i.e. the reactive (111) crystallographic planes present on their surface, together with the electrical characteristics and morphology of the polymer, as well as the synergistic activity of both components. Biocompatible polymers with good conductivity and electrochemical activity, such as polyaniline or polypyrrole, are good choices for the formation of functional composites with these MNPs, by in-situ polymerization processes. In addition, they protect the MNPs from agglomeration or oxidation and improve their physicochemical characteristics, functions, and variety of applications. The electrocatalytic response of the different prepared nanocomposites for oxygen reduction reaction, and direct borohydride fuel cells, together with their antimicrobial activity, currently investigated in this field in our group, are the subject of the presented work.
PB  - Hungary : University of Szeged
C3  - 29th International Symposium on Analytical and Environmental Problems : Proceedings
T1  - Biological and catalytic active nanocomposites of metal nanoparticles (Ag, Au, and Cu) and conductive polymers (polyaniline and polypyrrole) for various applications
SP  - 308
EP  - 308
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12534
ER  - 

@conference{
author = "Stamenović, Una and Vodnik, Vesna and Mašojević, Dijana",
year = "2023",
abstract = "A special group of functional materials with advanced features and accordingly promising applications are the nanocomposites of the metal nanoparticles (MNPs) - gold (Au), silver (Ag), and copper (Cu) and intrinsically conductive polymers - polyaniline and polypyrrole [1-7]. Thanks to the characteristics of these MNPs such as tunability of the plasmon resonance through variation of their size, shape, and composition, in combination with polymers, it is possible to create nanocomposites for specific biomedical and catalytic use as a variety of biological/catalytic processes occurring at nanometer scale. These processes are also related to the surface effects of the MNPs, i.e. the reactive (111) crystallographic planes present on their surface, together with the electrical characteristics and morphology of the polymer, as well as the synergistic activity of both components. Biocompatible polymers with good conductivity and electrochemical activity, such as polyaniline or polypyrrole, are good choices for the formation of functional composites with these MNPs, by in-situ polymerization processes. In addition, they protect the MNPs from agglomeration or oxidation and improve their physicochemical characteristics, functions, and variety of applications. The electrocatalytic response of the different prepared nanocomposites for oxygen reduction reaction, and direct borohydride fuel cells, together with their antimicrobial activity, currently investigated in this field in our group, are the subject of the presented work.",
publisher = "Hungary : University of Szeged",
journal = "29th International Symposium on Analytical and Environmental Problems : Proceedings",
title = "Biological and catalytic active nanocomposites of metal nanoparticles (Ag, Au, and Cu) and conductive polymers (polyaniline and polypyrrole) for various applications",
pages = "308-308",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12534"
}

Stamenović, U., Vodnik, V.,& Mašojević, D.. (2023). Biological and catalytic active nanocomposites of metal nanoparticles (Ag, Au, and Cu) and conductive polymers (polyaniline and polypyrrole) for various applications. in 29th International Symposium on Analytical and Environmental Problems : Proceedings
Hungary : University of Szeged., 308-308.
https://hdl.handle.net/21.15107/rcub_vinar_12534

Stamenović U, Vodnik V, Mašojević D. Biological and catalytic active nanocomposites of metal nanoparticles (Ag, Au, and Cu) and conductive polymers (polyaniline and polypyrrole) for various applications. in 29th International Symposium on Analytical and Environmental Problems : Proceedings. 2023;:308-308.
https://hdl.handle.net/21.15107/rcub_vinar_12534 .

Stamenović, Una, Vodnik, Vesna, Mašojević, Dijana, "Biological and catalytic active nanocomposites of metal nanoparticles (Ag, Au, and Cu) and conductive polymers (polyaniline and polypyrrole) for various applications" in 29th International Symposium on Analytical and Environmental Problems : Proceedings (2023):308-308,
https://hdl.handle.net/21.15107/rcub_vinar_12534 .

TY  - JOUR
AU  - Danilović, Danijela
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Nahon, Laurent
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Đoković, Vladimir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10385
AB  - The angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles was carried out by using velocity map imaging technique at the DESIRS beamline of SOLEIL synchrotron facility. The reported spectroscopy results were obtained after interaction of the synchrotron radiation with a polydisperse aerosol produced from aqueous dispersion of silver sulfide particles, approximately 16 nm in diameter. The photoelectron and UV–Vis-NIR absorption spectra were used to estimate the maximum energy of the valance- and the minimum energy of the conduction-band of the nanoparticles. With respect to the vacuum level, the obtained values were found to be 5.5 ± 0.1 eV and 4.5 ± 0.1 eV for the valence band maximum and conduction band minimum, respectively. The dependence of the asymmetry parameter on the electron energy along the silver sulfide valence band showed an onset of inelastic scattering at ~ 1 eV electron kinetic energy.
T2  - Optical and Quantum Electronics
T1  - Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles
VL  - 54
IS  - 9
SP  - 604
DO  - 10.1007/s11082-022-03972-6
ER  - 

@article{
author = "Danilović, Danijela and Božanić, Dušan K. and Garcia, Gustavo A. and Nahon, Laurent and Stamenović, Una and Vodnik, Vesna and Đoković, Vladimir",
year = "2022",
abstract = "The angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles was carried out by using velocity map imaging technique at the DESIRS beamline of SOLEIL synchrotron facility. The reported spectroscopy results were obtained after interaction of the synchrotron radiation with a polydisperse aerosol produced from aqueous dispersion of silver sulfide particles, approximately 16 nm in diameter. The photoelectron and UV–Vis-NIR absorption spectra were used to estimate the maximum energy of the valance- and the minimum energy of the conduction-band of the nanoparticles. With respect to the vacuum level, the obtained values were found to be 5.5 ± 0.1 eV and 4.5 ± 0.1 eV for the valence band maximum and conduction band minimum, respectively. The dependence of the asymmetry parameter on the electron energy along the silver sulfide valence band showed an onset of inelastic scattering at ~ 1 eV electron kinetic energy.",
journal = "Optical and Quantum Electronics",
title = "Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles",
volume = "54",
number = "9",
pages = "604",
doi = "10.1007/s11082-022-03972-6"
}

Danilović, D., Božanić, D. K., Garcia, G. A., Nahon, L., Stamenović, U., Vodnik, V.,& Đoković, V.. (2022). Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles. in Optical and Quantum Electronics, 54(9), 604.
https://doi.org/10.1007/s11082-022-03972-6

Danilović D, Božanić DK, Garcia GA, Nahon L, Stamenović U, Vodnik V, Đoković V. Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles. in Optical and Quantum Electronics. 2022;54(9):604.
doi:10.1007/s11082-022-03972-6 .

Danilović, Danijela, Božanić, Dušan K., Garcia, Gustavo A., Nahon, Laurent, Stamenović, Una, Vodnik, Vesna, Đoković, Vladimir, "Velocity map imaging VUV angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles" in Optical and Quantum Electronics, 54, no. 9 (2022):604,
https://doi.org/10.1007/s11082-022-03972-6 . .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Tapia, Andres
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Otoničar, Mojca
AU  - Škapin, Srečo Davor
AU  - Santos, Diogo M. F.
AU  - Šljukić, Biljana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10436
AB  - Gold polypyrrole (AuPPy) and copper polypyrrole (CuPPy) nanocomposites were prepared by a simple one-step in situ oxidative polymerization of pyrrole monomer by Au3+ and Cu2+ ions. Owing to their characteristic physicochemical properties confirmed by optical and structural characterization methods, the behavior of these materials as electrocatalysts for borohydride oxidation reaction (BOR) was considered. BOR apparent activation energy was found to be 16 and 22 kJ mol−1 for AuPPy and CuPPy electrocatalyst, respectively. The stability of the two electrocatalysts was assessed by chronoamperometry. Moreover, fuel cell tests were carried out with AuPPy and CuPPy as anode electrocatalyst of a direct borohydride-peroxide fuel cell (DBPFC). Open circuit voltage (OCV) of 1.30 V was obtained with both AuPPy and CuPPy, with the OCV increasing to 1.45 V upon adding a small amount of carbon (AuPPy-C). The peak power density of a DBPFC with BOR at AuPPy-C anode and hydrogen peroxide reduction reaction at Pt cathode was found to be ca. 162 mW cm−2 at 65 °C.
T2  - International Journal of Hydrogen Energy
T1  - High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications
DO  - 10.1016/j.ijhydene.2022.08.229
ER  - 

@article{
author = "Milikić, Jadranka and Tapia, Andres and Stamenović, Una and Vodnik, Vesna and Otoničar, Mojca and Škapin, Srečo Davor and Santos, Diogo M. F. and Šljukić, Biljana",
year = "2022",
abstract = "Gold polypyrrole (AuPPy) and copper polypyrrole (CuPPy) nanocomposites were prepared by a simple one-step in situ oxidative polymerization of pyrrole monomer by Au3+ and Cu2+ ions. Owing to their characteristic physicochemical properties confirmed by optical and structural characterization methods, the behavior of these materials as electrocatalysts for borohydride oxidation reaction (BOR) was considered. BOR apparent activation energy was found to be 16 and 22 kJ mol−1 for AuPPy and CuPPy electrocatalyst, respectively. The stability of the two electrocatalysts was assessed by chronoamperometry. Moreover, fuel cell tests were carried out with AuPPy and CuPPy as anode electrocatalyst of a direct borohydride-peroxide fuel cell (DBPFC). Open circuit voltage (OCV) of 1.30 V was obtained with both AuPPy and CuPPy, with the OCV increasing to 1.45 V upon adding a small amount of carbon (AuPPy-C). The peak power density of a DBPFC with BOR at AuPPy-C anode and hydrogen peroxide reduction reaction at Pt cathode was found to be ca. 162 mW cm−2 at 65 °C.",
journal = "International Journal of Hydrogen Energy",
title = "High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications",
doi = "10.1016/j.ijhydene.2022.08.229"
}

Milikić, J., Tapia, A., Stamenović, U., Vodnik, V., Otoničar, M., Škapin, S. D., Santos, D. M. F.,& Šljukić, B.. (2022). High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications. in International Journal of Hydrogen Energy.
https://doi.org/10.1016/j.ijhydene.2022.08.229

Milikić J, Tapia A, Stamenović U, Vodnik V, Otoničar M, Škapin SD, Santos DMF, Šljukić B. High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications. in International Journal of Hydrogen Energy. 2022;.
doi:10.1016/j.ijhydene.2022.08.229 .

Milikić, Jadranka, Tapia, Andres, Stamenović, Una, Vodnik, Vesna, Otoničar, Mojca, Škapin, Srečo Davor, Santos, Diogo M. F., Šljukić, Biljana, "High-performance metal (Au,Cu)–polypyrrole nanocomposites for electrochemical borohydride oxidation in fuel cell applications" in International Journal of Hydrogen Energy (2022),
https://doi.org/10.1016/j.ijhydene.2022.08.229 . .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Radosavljević, Aleksandra
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12493
AB  - Recently, the one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, smart grippers, artificial muscles, and smart devices. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers. Under the visible light irradiation, the local photo-thermal shrinking is induced, which enables the external wireless remote control of hydrogels and photo-thermalmechanical motions such as bending, curling, and spiraling [1-3]. In this work, hydrogel nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) and AuNPs were produced by radiolytic method. The presence of AuNPs,nanospheres and nanorods, incorporated into PNiPAAm hydrogel was confirmed by UV-Vis spectroscopy, XRD, TEM and SEM. The influence of different shapes of AuNPs on physicochemical properties of AuPNiPAAm hydrogel nanocomposites was investigated. Swelling and deswelling kinetics in water at 25C and 48C,respectively, indicate that all samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport). On the other hand, volume phase transition temperature (VPTT), can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from 32.5 C for Au nanorods to 30.5Cfor Au nanospheres. Moreover, Au-PNiPAAm hydrogel nanocomposites possess an excellent -switchable electrical conductivity, especially in the case of Au nanorods.
C3  - The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts
T1  - Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12493
ER  - 

@conference{
author = "Nikolić, Nikolina and Radosavljević, Aleksandra and Spasojević, Jelena and Stamenović, Una and Vodnik, Vesna and Kačarević-Popović, Zorica",
year = "2022",
abstract = "Recently, the one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, smart grippers, artificial muscles, and smart devices. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers. Under the visible light irradiation, the local photo-thermal shrinking is induced, which enables the external wireless remote control of hydrogels and photo-thermalmechanical motions such as bending, curling, and spiraling [1-3]. In this work, hydrogel nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) and AuNPs were produced by radiolytic method. The presence of AuNPs,nanospheres and nanorods, incorporated into PNiPAAm hydrogel was confirmed by UV-Vis spectroscopy, XRD, TEM and SEM. The influence of different shapes of AuNPs on physicochemical properties of AuPNiPAAm hydrogel nanocomposites was investigated. Swelling and deswelling kinetics in water at 25C and 48C,respectively, indicate that all samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport). On the other hand, volume phase transition temperature (VPTT), can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from 32.5 C for Au nanorods to 30.5Cfor Au nanospheres. Moreover, Au-PNiPAAm hydrogel nanocomposites possess an excellent -switchable electrical conductivity, especially in the case of Au nanorods.",
journal = "The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts",
title = "Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12493"
}

Nikolić, N., Radosavljević, A., Spasojević, J., Stamenović, U., Vodnik, V.,& Kačarević-Popović, Z.. (2022). Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion. in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts, 86-86.
https://hdl.handle.net/21.15107/rcub_vinar_12493

Nikolić N, Radosavljević A, Spasojević J, Stamenović U, Vodnik V, Kačarević-Popović Z. Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion. in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts. 2022;:86-86.
https://hdl.handle.net/21.15107/rcub_vinar_12493 .

Nikolić, Nikolina, Radosavljević, Aleksandra, Spasojević, Jelena, Stamenović, Una, Vodnik, Vesna, Kačarević-Popović, Zorica, "Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion" in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts (2022):86-86,
https://hdl.handle.net/21.15107/rcub_vinar_12493 .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Radosavljević, Aleksandra
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Tadić, Julijana
AU  - Kačarević-Popović, Zorica
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12494
AB  - In this study, bi-layered hydrogel nanocomposites, based on gold nanoparticles (AuNPs) embedded in poly(N-isopropylacrylamide) (PNiPAAm) and poly(vinyl alcohol) (PVA) hydrogel were developed. PNiPAAm with AuNPs represents an active, while PVA represents a passive layer. Crosslinking of polymer matrix with stable 3D structure was obtained by the combination of freezethaw and radiolytic methods, while nanoparticles were synthesized using the seed-mediated approach. The UV-Vis absorption spectra and TEM measurements confirm the presence of spherical AuNPs, with a diameter of 30 nm. The influence of AuNPs on the swelling/deswelling behavior and on volume phase transition temperature (VPTT) in distilled water was investigated. The obtained results showed that values of network and diffusion parameters increase with the incorporation of AuNPs and that the swelling transport mechanism is a non-Fickian transport.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry - Physical Chemistry 2022 : Proceedings
T1  - Physico-chemical characterization of Bi-layered Au-PNiPAAm/PVA hydrogel nanocomposites
VL  - 2
SP  - 371
EP  - 374
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12494
ER  - 

@conference{
author = "Nikolić, Nikolina and Radosavljević, Aleksandra and Spasojević, Jelena and Stamenović, Una and Vodnik, Vesna and Tadić, Julijana and Kačarević-Popović, Zorica",
year = "2022",
abstract = "In this study, bi-layered hydrogel nanocomposites, based on gold nanoparticles (AuNPs) embedded in poly(N-isopropylacrylamide) (PNiPAAm) and poly(vinyl alcohol) (PVA) hydrogel were developed. PNiPAAm with AuNPs represents an active, while PVA represents a passive layer. Crosslinking of polymer matrix with stable 3D structure was obtained by the combination of freezethaw and radiolytic methods, while nanoparticles were synthesized using the seed-mediated approach. The UV-Vis absorption spectra and TEM measurements confirm the presence of spherical AuNPs, with a diameter of 30 nm. The influence of AuNPs on the swelling/deswelling behavior and on volume phase transition temperature (VPTT) in distilled water was investigated. The obtained results showed that values of network and diffusion parameters increase with the incorporation of AuNPs and that the swelling transport mechanism is a non-Fickian transport.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "16th International Conference on Fundamental and Applied Aspects of Physical Chemistry - Physical Chemistry 2022 : Proceedings",
title = "Physico-chemical characterization of Bi-layered Au-PNiPAAm/PVA hydrogel nanocomposites",
volume = "2",
pages = "371-374",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12494"
}

Nikolić, N., Radosavljević, A., Spasojević, J., Stamenović, U., Vodnik, V., Tadić, J.,& Kačarević-Popović, Z.. (2022). Physico-chemical characterization of Bi-layered Au-PNiPAAm/PVA hydrogel nanocomposites. in 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry - Physical Chemistry 2022 : Proceedings
Belgrade : Society of Physical Chemists of Serbia., 2, 371-374.
https://hdl.handle.net/21.15107/rcub_vinar_12494

Nikolić N, Radosavljević A, Spasojević J, Stamenović U, Vodnik V, Tadić J, Kačarević-Popović Z. Physico-chemical characterization of Bi-layered Au-PNiPAAm/PVA hydrogel nanocomposites. in 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry - Physical Chemistry 2022 : Proceedings. 2022;2:371-374.
https://hdl.handle.net/21.15107/rcub_vinar_12494 .

Nikolić, Nikolina, Radosavljević, Aleksandra, Spasojević, Jelena, Stamenović, Una, Vodnik, Vesna, Tadić, Julijana, Kačarević-Popović, Zorica, "Physico-chemical characterization of Bi-layered Au-PNiPAAm/PVA hydrogel nanocomposites" in 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry - Physical Chemistry 2022 : Proceedings, 2 (2022):371-374,
https://hdl.handle.net/21.15107/rcub_vinar_12494 .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Radosavljević, Aleksandra
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Tadić, Julijana
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12495
AB  - Recently, one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Among them, photoactuators as smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles are probably the most commonly used active layers. The functional gold nanoparticles exhibit unique photo-thermal properties as a result of a surface plasmon resonance (SPR) electron-phonon process and intrinsic inter-band transitions. Upon immobilization in thermoresponsive hydrogel, they induce local photo-thermal shrinking under visible light irradiation and thus enable external wireless remote control of hydrogel device and programmable photo-thermomechanical motions such as bending, curling, and spiralling. In this work, bi-layered photoactuators based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) hydrogel with incorporated gold nanoparticles as an active layer, and poly(vinyl alcohol) hydrogel as a passive layer were produced. Crosslinking of polymer matrix was done by combination of freeze-thaw and radiolytic methods, while nanoparticles were synthesized using the seed-mediated approach. Two different shapes of nanoparticles were incorporated into PNiPAAm hydrogel, gold nanospheres (AuNPs) with radius around 10 nm and gold nanorods (AuNRs) with aspect ratio of 5 (radius of 10 nm, length of 50 nm). The formation of nanoparticles within the active layer was confirmed by appearance of characteristic SPR bands with maxima around 540 nm for AuNPs, and transversal oscillation at 530 nm and longitudinal oscillation around 760 nm for AuNRs. The XRD data for both AuNPs and AuNRs are consistent with the face-centered cubic (fcc) crystal structure of bulk metallic gold, while the FTIR spectra indicated the existence of physical interaction between nanoparticles and polymer matrix. The influence of different shapes of nanoparticles on physicochemical properties of bi-layered photoactuators was investigated in order to determine swelling and deswelling properties, as well as volume phase transition temperature (VPTT). Incorporation of AuNRs into active layer of photoactuators leads to an increase of both swelling capacity and VPTT. The results obtained from compression measurements shows that mechanical properties of investigated systems depend on shape and concentration of incorporated gold nanorods. Moreover, the photo-thermo-mechanical effect induced by the visible light irradiation was visualized by bending deformation as a consequence of the energy conversion in the active layer
C3  - ICARST-2022 : Second International Conference on Applications of Radiation Science and Technology" : Book of abstracts
T1  - Bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposite photoactuators for direct optical to mechanical energy conversion
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12495
ER  - 

@conference{
author = "Nikolić, Nikolina and Radosavljević, Aleksandra and Spasojević, Jelena and Stamenović, Una and Tadić, Julijana and Vodnik, Vesna and Kačarević-Popović, Zorica",
year = "2022",
abstract = "Recently, one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Among them, photoactuators as smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles are probably the most commonly used active layers. The functional gold nanoparticles exhibit unique photo-thermal properties as a result of a surface plasmon resonance (SPR) electron-phonon process and intrinsic inter-band transitions. Upon immobilization in thermoresponsive hydrogel, they induce local photo-thermal shrinking under visible light irradiation and thus enable external wireless remote control of hydrogel device and programmable photo-thermomechanical motions such as bending, curling, and spiralling. In this work, bi-layered photoactuators based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) hydrogel with incorporated gold nanoparticles as an active layer, and poly(vinyl alcohol) hydrogel as a passive layer were produced. Crosslinking of polymer matrix was done by combination of freeze-thaw and radiolytic methods, while nanoparticles were synthesized using the seed-mediated approach. Two different shapes of nanoparticles were incorporated into PNiPAAm hydrogel, gold nanospheres (AuNPs) with radius around 10 nm and gold nanorods (AuNRs) with aspect ratio of 5 (radius of 10 nm, length of 50 nm). The formation of nanoparticles within the active layer was confirmed by appearance of characteristic SPR bands with maxima around 540 nm for AuNPs, and transversal oscillation at 530 nm and longitudinal oscillation around 760 nm for AuNRs. The XRD data for both AuNPs and AuNRs are consistent with the face-centered cubic (fcc) crystal structure of bulk metallic gold, while the FTIR spectra indicated the existence of physical interaction between nanoparticles and polymer matrix. The influence of different shapes of nanoparticles on physicochemical properties of bi-layered photoactuators was investigated in order to determine swelling and deswelling properties, as well as volume phase transition temperature (VPTT). Incorporation of AuNRs into active layer of photoactuators leads to an increase of both swelling capacity and VPTT. The results obtained from compression measurements shows that mechanical properties of investigated systems depend on shape and concentration of incorporated gold nanorods. Moreover, the photo-thermo-mechanical effect induced by the visible light irradiation was visualized by bending deformation as a consequence of the energy conversion in the active layer",
journal = "ICARST-2022 : Second International Conference on Applications of Radiation Science and Technology" : Book of abstracts",
title = "Bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposite photoactuators for direct optical to mechanical energy conversion",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12495"
}

Nikolić, N., Radosavljević, A., Spasojević, J., Stamenović, U., Tadić, J., Vodnik, V.,& Kačarević-Popović, Z.. (2022). Bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposite photoactuators for direct optical to mechanical energy conversion. in ICARST-2022 : Second International Conference on Applications of Radiation Science and Technology" : Book of abstracts.
https://hdl.handle.net/21.15107/rcub_vinar_12495

Nikolić N, Radosavljević A, Spasojević J, Stamenović U, Tadić J, Vodnik V, Kačarević-Popović Z. Bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposite photoactuators for direct optical to mechanical energy conversion. in ICARST-2022 : Second International Conference on Applications of Radiation Science and Technology" : Book of abstracts. 2022;.
https://hdl.handle.net/21.15107/rcub_vinar_12495 .

Nikolić, Nikolina, Radosavljević, Aleksandra, Spasojević, Jelena, Stamenović, Una, Tadić, Julijana, Vodnik, Vesna, Kačarević-Popović, Zorica, "Bi-layered Au-(PNiPAAm/PVA) hydrogel nanocomposite photoactuators for direct optical to mechanical energy conversion" in ICARST-2022 : Second International Conference on Applications of Radiation Science and Technology" : Book of abstracts (2022),
https://hdl.handle.net/21.15107/rcub_vinar_12495 .

TY  - CONF
AU  - Mašojević, Dijana
AU  - Vodnik, Vesna
AU  - Spasojević, J.
AU  - Barudžija, Tanja
AU  - Otoničar, Mojca
AU  - Davidović, Slađana
AU  - Stamenović, Una
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12535
AB  - A novel and favorable antibacterial agent as a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By simple in situ polymerization method, copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout PPy matrix with granular morphology, was characterized and subjected to determination of antibacterial activity toward bacteria Escherichia coli and Staphylococcus aureus. Knowing that when acting alone, CuNPs and PPy have already shown antimicrobial responce, their mutual and synergetic engagement against bacteria in this survey is somewhat expected. After a twenty-four-hour interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17% of bacterial growth inhibition. Such nanocomposite could easily find application in water disinfection, soil sterilization and food preservation.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Book of abstracts
T1  - Antibacterial activity of copper/polypyrrole nanocomposite
SP  - 174
EP  - 174
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12535
ER  - 

@conference{
author = "Mašojević, Dijana and Vodnik, Vesna and Spasojević, J. and Barudžija, Tanja and Otoničar, Mojca and Davidović, Slađana and Stamenović, Una",
year = "2022",
abstract = "A novel and favorable antibacterial agent as a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By simple in situ polymerization method, copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout PPy matrix with granular morphology, was characterized and subjected to determination of antibacterial activity toward bacteria Escherichia coli and Staphylococcus aureus. Knowing that when acting alone, CuNPs and PPy have already shown antimicrobial responce, their mutual and synergetic engagement against bacteria in this survey is somewhat expected. After a twenty-four-hour interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17% of bacterial growth inhibition. Such nanocomposite could easily find application in water disinfection, soil sterilization and food preservation.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Book of abstracts",
title = "Antibacterial activity of copper/polypyrrole nanocomposite",
pages = "174-174",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12535"
}

Mašojević, D., Vodnik, V., Spasojević, J., Barudžija, T., Otoničar, M., Davidović, S.,& Stamenović, U.. (2022). Antibacterial activity of copper/polypyrrole nanocomposite. in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Book of abstracts
Belgrade : Society of Physical Chemists of Serbia., 174-174.
https://hdl.handle.net/21.15107/rcub_vinar_12535

Mašojević D, Vodnik V, Spasojević J, Barudžija T, Otoničar M, Davidović S, Stamenović U. Antibacterial activity of copper/polypyrrole nanocomposite. in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Book of abstracts. 2022;:174-174.
https://hdl.handle.net/21.15107/rcub_vinar_12535 .

Mašojević, Dijana, Vodnik, Vesna, Spasojević, J., Barudžija, Tanja, Otoničar, Mojca, Davidović, Slađana, Stamenović, Una, "Antibacterial activity of copper/polypyrrole nanocomposite" in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Book of abstracts (2022):174-174,
https://hdl.handle.net/21.15107/rcub_vinar_12535 .

TY  - CONF
AU  - Mašojević, Dijana
AU  - Vodnik, Vesna
AU  - Spasojević, Jelena
AU  - Barudžija, Tanja
AU  - Otoničar, Mojca
AU  - Davidović, Slađana
AU  - Stamenović, Una
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12536
AB  - A novel and favorable antibacterial agent as a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By simple in situ polymerization method, copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout PPy matrix with granular morphology, was characterized and subjected to determination of antibacterial activity toward bacteria Escherichia coli and Staphylococcus aureus. Knowing that when acting alone, CuNPs and PPy have already shown antimicrobial responce, their mutual and synergetic engagement against bacteria in this survey is somewhat expected. After a twenty-fourhour interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17% of bacterial growth inhibition. Such nanocomposite could easily find application in water disinfection, soil sterilization and food preservation.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Proceedings
T1  - Antibacterial activity of copper/polypyrrole nanocomposite
VL  - 2
SP  - 629
EP  - 632
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12536
ER  - 

@conference{
author = "Mašojević, Dijana and Vodnik, Vesna and Spasojević, Jelena and Barudžija, Tanja and Otoničar, Mojca and Davidović, Slađana and Stamenović, Una",
year = "2022",
abstract = "A novel and favorable antibacterial agent as a combination of copper nanoparticles (CuNPs) and polypyrrole (PPy) is presented. By simple in situ polymerization method, copper/polypyrrole (Cu/PPy) nanocomposite with spherical CuNPs, around 25 nm in diameter, uniformly dispersed throughout PPy matrix with granular morphology, was characterized and subjected to determination of antibacterial activity toward bacteria Escherichia coli and Staphylococcus aureus. Knowing that when acting alone, CuNPs and PPy have already shown antimicrobial responce, their mutual and synergetic engagement against bacteria in this survey is somewhat expected. After a twenty-fourhour interaction with S. aureus, already 2 ppm of Cu/PPy with only 9.45 wt% content of Cu is acting almost completely cidal, with 99.17% of bacterial growth inhibition. Such nanocomposite could easily find application in water disinfection, soil sterilization and food preservation.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Proceedings",
title = "Antibacterial activity of copper/polypyrrole nanocomposite",
volume = "2",
pages = "629-632",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12536"
}

Mašojević, D., Vodnik, V., Spasojević, J., Barudžija, T., Otoničar, M., Davidović, S.,& Stamenović, U.. (2022). Antibacterial activity of copper/polypyrrole nanocomposite. in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Proceedings
Belgrade : Society of Physical Chemists of Serbia., 2, 629-632.
https://hdl.handle.net/21.15107/rcub_vinar_12536

Mašojević D, Vodnik V, Spasojević J, Barudžija T, Otoničar M, Davidović S, Stamenović U. Antibacterial activity of copper/polypyrrole nanocomposite. in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Proceedings. 2022;2:629-632.
https://hdl.handle.net/21.15107/rcub_vinar_12536 .

Mašojević, Dijana, Vodnik, Vesna, Spasojević, Jelena, Barudžija, Tanja, Otoničar, Mojca, Davidović, Slađana, Stamenović, Una, "Antibacterial activity of copper/polypyrrole nanocomposite" in PHYSICAL CHEMISTRY 2022 : 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry : Proceedings, 2 (2022):629-632,
https://hdl.handle.net/21.15107/rcub_vinar_12536 .

TY  - JOUR
AU  - Radinović, Kristina
AU  - Milikić, Jadranka
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Otoničar, Mojca
AU  - Škapin, Srečo Davor
AU  - Šljukić, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9860
AB  - Nanocomposites of gold nanoparticles (AuNPs) and conducting polymers, polypyrrole (PPy) and polyaniline (PANI), were prepared by simple oxidative polymerization of the corresponding monomer (pyrrole and aniline, respectively) by tetrachloroauric acid. Au nanospheres and nanorods were formed in the case of Au@PPy and Au@PANI, respectively. Detection of As(III) using Au@polymer was investigated where both nanocomposites showed similar activity for As electrooxidation in acidic media. The activity of Au@PPy was notably improved upon the addition of a small amount of conducting carbon, giving higher current densities compared to the commercial Au electrode. Further optimization of the operational conditions including electrolyte composition, deposition time and potential, was carried out to reach the limit of quantification as low as 2 ppb. Au@PPy nanocomposite proved to be suitable for sensing of As(III) in the presence of other ions, such as Cu(II). Furthermore, it proved to be suitable for As(III) sensing in real samples.
T2  - Synthetic Metals
T1  - Tailoring gold-conducting polymer nanocomposites for sensors applications: Proof of concept for As(III) sensing in aqueous media
VL  - 278
SP  - 116834
DO  - 10.1016/j.synthmet.2021.116834
ER  - 

@article{
author = "Radinović, Kristina and Milikić, Jadranka and Stamenović, Una and Vodnik, Vesna and Otoničar, Mojca and Škapin, Srečo Davor and Šljukić, Biljana",
year = "2021",
abstract = "Nanocomposites of gold nanoparticles (AuNPs) and conducting polymers, polypyrrole (PPy) and polyaniline (PANI), were prepared by simple oxidative polymerization of the corresponding monomer (pyrrole and aniline, respectively) by tetrachloroauric acid. Au nanospheres and nanorods were formed in the case of Au@PPy and Au@PANI, respectively. Detection of As(III) using Au@polymer was investigated where both nanocomposites showed similar activity for As electrooxidation in acidic media. The activity of Au@PPy was notably improved upon the addition of a small amount of conducting carbon, giving higher current densities compared to the commercial Au electrode. Further optimization of the operational conditions including electrolyte composition, deposition time and potential, was carried out to reach the limit of quantification as low as 2 ppb. Au@PPy nanocomposite proved to be suitable for sensing of As(III) in the presence of other ions, such as Cu(II). Furthermore, it proved to be suitable for As(III) sensing in real samples.",
journal = "Synthetic Metals",
title = "Tailoring gold-conducting polymer nanocomposites for sensors applications: Proof of concept for As(III) sensing in aqueous media",
volume = "278",
pages = "116834",
doi = "10.1016/j.synthmet.2021.116834"
}

Radinović, K., Milikić, J., Stamenović, U., Vodnik, V., Otoničar, M., Škapin, S. D.,& Šljukić, B.. (2021). Tailoring gold-conducting polymer nanocomposites for sensors applications: Proof of concept for As(III) sensing in aqueous media. in Synthetic Metals, 278, 116834.
https://doi.org/10.1016/j.synthmet.2021.116834

Radinović K, Milikić J, Stamenović U, Vodnik V, Otoničar M, Škapin SD, Šljukić B. Tailoring gold-conducting polymer nanocomposites for sensors applications: Proof of concept for As(III) sensing in aqueous media. in Synthetic Metals. 2021;278:116834.
doi:10.1016/j.synthmet.2021.116834 .

Radinović, Kristina, Milikić, Jadranka, Stamenović, Una, Vodnik, Vesna, Otoničar, Mojca, Škapin, Srečo Davor, Šljukić, Biljana, "Tailoring gold-conducting polymer nanocomposites for sensors applications: Proof of concept for As(III) sensing in aqueous media" in Synthetic Metals, 278 (2021):116834,
https://doi.org/10.1016/j.synthmet.2021.116834 . .

TY  - JOUR
AU  - Stamenović, Una
AU  - Davidović, Slađana
AU  - Petrović, Sandra
AU  - Leskovac, Andreja
AU  - Stoiljković, Milovan
AU  - Vodnik, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9874
AB  - Two silver–polyaniline/polyvinylpyrrolidone (Ag–PANI/PVP) nanocomposites were prepared using in situ integration of silver nanoparticles (AgNPs) during oxidative aniline polymerization, accelerated by the presence of PVP, which as well minimized the risk of particle agglomeration and macroscopic precipitation. Both nanocomposites have similar silver content (∼44 wt% Ag) but different morphological features of AgNPs (spheres/triangles) and polymers (granular/wrinkling pattern). Several spectroscopic, macroscopic, and analytical techniques, microscopy, and surface analysis methods have been used to analyze their physical and chemical properties. Investigation of their antimicrobial potential and possible application as an effective weapon against indicator microbial strains, E. coli, S. aureus, and C. albicans, has shown inhibition of microbial growth by more than 90%, even at low composite concentrations (5 ppm) and short contact time (4 h). A biosafety assessment of Ag–PANI/PVP that comprised testing the genotoxicity and redox modulating activity was performed using human peripheral blood cells as a model system. The obtained results have shown that the investigated Ag–PANI/PVP exhibited significant prooxidant and cytostatic effects (p < 0.05) with no apparent potential to induce DNA damage. Although precautions should be taken to protect human health, the significant antimicrobial efficiency of Ag–PANI/PVP makes it suitable for further studies and applications in non-medical areas, such as wastewater treatment.
T2  - New Journal of Chemistry
T1  - Antimicrobial and biological effects of polyaniline/polyvinylpyrrolidone nanocomposites loaded with silver nanospheres/triangles
VL  - 45
IS  - 28
SP  - 12711
EP  - 12720
DO  - 10.1039/D1NJ02729H
ER  - 

@article{
author = "Stamenović, Una and Davidović, Slađana and Petrović, Sandra and Leskovac, Andreja and Stoiljković, Milovan and Vodnik, Vesna",
year = "2021",
abstract = "Two silver–polyaniline/polyvinylpyrrolidone (Ag–PANI/PVP) nanocomposites were prepared using in situ integration of silver nanoparticles (AgNPs) during oxidative aniline polymerization, accelerated by the presence of PVP, which as well minimized the risk of particle agglomeration and macroscopic precipitation. Both nanocomposites have similar silver content (∼44 wt% Ag) but different morphological features of AgNPs (spheres/triangles) and polymers (granular/wrinkling pattern). Several spectroscopic, macroscopic, and analytical techniques, microscopy, and surface analysis methods have been used to analyze their physical and chemical properties. Investigation of their antimicrobial potential and possible application as an effective weapon against indicator microbial strains, E. coli, S. aureus, and C. albicans, has shown inhibition of microbial growth by more than 90%, even at low composite concentrations (5 ppm) and short contact time (4 h). A biosafety assessment of Ag–PANI/PVP that comprised testing the genotoxicity and redox modulating activity was performed using human peripheral blood cells as a model system. The obtained results have shown that the investigated Ag–PANI/PVP exhibited significant prooxidant and cytostatic effects (p < 0.05) with no apparent potential to induce DNA damage. Although precautions should be taken to protect human health, the significant antimicrobial efficiency of Ag–PANI/PVP makes it suitable for further studies and applications in non-medical areas, such as wastewater treatment.",
journal = "New Journal of Chemistry",
title = "Antimicrobial and biological effects of polyaniline/polyvinylpyrrolidone nanocomposites loaded with silver nanospheres/triangles",
volume = "45",
number = "28",
pages = "12711-12720",
doi = "10.1039/D1NJ02729H"
}

Stamenović, U., Davidović, S., Petrović, S., Leskovac, A., Stoiljković, M.,& Vodnik, V.. (2021). Antimicrobial and biological effects of polyaniline/polyvinylpyrrolidone nanocomposites loaded with silver nanospheres/triangles. in New Journal of Chemistry, 45(28), 12711-12720.
https://doi.org/10.1039/D1NJ02729H

Stamenović U, Davidović S, Petrović S, Leskovac A, Stoiljković M, Vodnik V. Antimicrobial and biological effects of polyaniline/polyvinylpyrrolidone nanocomposites loaded with silver nanospheres/triangles. in New Journal of Chemistry. 2021;45(28):12711-12720.
doi:10.1039/D1NJ02729H .

Stamenović, Una, Davidović, Slađana, Petrović, Sandra, Leskovac, Andreja, Stoiljković, Milovan, Vodnik, Vesna, "Antimicrobial and biological effects of polyaniline/polyvinylpyrrolidone nanocomposites loaded with silver nanospheres/triangles" in New Journal of Chemistry, 45, no. 28 (2021):12711-12720,
https://doi.org/10.1039/D1NJ02729H . .

TY  - JOUR
AU  - Vodnik, Vesna
AU  - Mojić, Marija
AU  - Stamenović, Una
AU  - Otoničar, Mojca
AU  - Ajdžanović, Vladimir
AU  - Maksimović-Ivanić, Danijela
AU  - Mijatović, Sanja
AU  - Marković, Mirjana
AU  - Barudžija, Tanja
AU  - Filipović, Branko
AU  - Milošević, Verica
AU  - Šošić-Jurjević, Branka
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9749
AB  - Soy isoflavone genistein (Gen) exerts beneficial effects against prostate cancer cells in vitro and in vivo. However, its use as a chemoprevention/therapeutic agent is largely limited due to its low bioavailability. In this study we synthesized two variants of a new delivery system, genistein–gold nanoparticles conjugates Gen@AuNPs1 and Gen@AuNPs2, by an environmentally friendly method, using a dual role of Gen to reduce Au3+ and stabilize the formed AuNPs, with no additional component. The formation of Gen@AuNPs was confirmed via UV–Vis spectroscopy, FTIR, and Raman spectra measurements. The spherical shape and uniform size of Gen@AuNPs1 and Gen@AuNPs2 (10 ± 2 and 23 ± 3 nm, respectively), were determined by transmission electron microscopy. The nano-conjugates also varied in hydrodynamic diameter (65.0 ± 1.7 and 153.0 ± 2.2 nm) but had similar negative zeta potential (−35.0 ± 2.5 and −37.0 ± 1.6 mV), as measured by dynamic light scattering. The Gen loading was estimated to be 46 and 48%, for Gen@AuNPs1 and Gen@AuNPs2, respectively. The antiproliferative activities of GenAuNPs were confirmed by MTT test in vitro on three malignant prostate carcinoma cell lines (PC3, DU 145, and LNCaP), while selectivity toward malignant phenotype was confirmed using non-cancerous MRC-5 cells. Flow cytometric analysis showed that the inhibition on cell proliferation of more potent Gen@AuNPs1 nano-conjugate is comparable with the effects of free Gen. In conclusion, the obtained results, including physicochemical characterization of newly synthesized AuNPs loaded with Gen, cytotoxicity, and IC50 assessments, indicate their stability and bioactivity as an antioxidant and anti-prostate cancer agent, with low toxicity against human primary cells. © 2021 Elsevier B.V.
T2  - Materials Science and Engineering: C
T1  - Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines
VL  - 124
SP  - 112078
DO  - 10.1016/j.msec.2021.112078
ER  - 

@article{
author = "Vodnik, Vesna and Mojić, Marija and Stamenović, Una and Otoničar, Mojca and Ajdžanović, Vladimir and Maksimović-Ivanić, Danijela and Mijatović, Sanja and Marković, Mirjana and Barudžija, Tanja and Filipović, Branko and Milošević, Verica and Šošić-Jurjević, Branka",
year = "2021",
abstract = "Soy isoflavone genistein (Gen) exerts beneficial effects against prostate cancer cells in vitro and in vivo. However, its use as a chemoprevention/therapeutic agent is largely limited due to its low bioavailability. In this study we synthesized two variants of a new delivery system, genistein–gold nanoparticles conjugates Gen@AuNPs1 and Gen@AuNPs2, by an environmentally friendly method, using a dual role of Gen to reduce Au3+ and stabilize the formed AuNPs, with no additional component. The formation of Gen@AuNPs was confirmed via UV–Vis spectroscopy, FTIR, and Raman spectra measurements. The spherical shape and uniform size of Gen@AuNPs1 and Gen@AuNPs2 (10 ± 2 and 23 ± 3 nm, respectively), were determined by transmission electron microscopy. The nano-conjugates also varied in hydrodynamic diameter (65.0 ± 1.7 and 153.0 ± 2.2 nm) but had similar negative zeta potential (−35.0 ± 2.5 and −37.0 ± 1.6 mV), as measured by dynamic light scattering. The Gen loading was estimated to be 46 and 48%, for Gen@AuNPs1 and Gen@AuNPs2, respectively. The antiproliferative activities of GenAuNPs were confirmed by MTT test in vitro on three malignant prostate carcinoma cell lines (PC3, DU 145, and LNCaP), while selectivity toward malignant phenotype was confirmed using non-cancerous MRC-5 cells. Flow cytometric analysis showed that the inhibition on cell proliferation of more potent Gen@AuNPs1 nano-conjugate is comparable with the effects of free Gen. In conclusion, the obtained results, including physicochemical characterization of newly synthesized AuNPs loaded with Gen, cytotoxicity, and IC50 assessments, indicate their stability and bioactivity as an antioxidant and anti-prostate cancer agent, with low toxicity against human primary cells. © 2021 Elsevier B.V.",
journal = "Materials Science and Engineering: C",
title = "Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines",
volume = "124",
pages = "112078",
doi = "10.1016/j.msec.2021.112078"
}

Vodnik, V., Mojić, M., Stamenović, U., Otoničar, M., Ajdžanović, V., Maksimović-Ivanić, D., Mijatović, S., Marković, M., Barudžija, T., Filipović, B., Milošević, V.,& Šošić-Jurjević, B.. (2021). Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines. in Materials Science and Engineering: C, 124, 112078.
https://doi.org/10.1016/j.msec.2021.112078

Vodnik V, Mojić M, Stamenović U, Otoničar M, Ajdžanović V, Maksimović-Ivanić D, Mijatović S, Marković M, Barudžija T, Filipović B, Milošević V, Šošić-Jurjević B. Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines. in Materials Science and Engineering: C. 2021;124:112078.
doi:10.1016/j.msec.2021.112078 .

Vodnik, Vesna, Mojić, Marija, Stamenović, Una, Otoničar, Mojca, Ajdžanović, Vladimir, Maksimović-Ivanić, Danijela, Mijatović, Sanja, Marković, Mirjana, Barudžija, Tanja, Filipović, Branko, Milošević, Verica, Šošić-Jurjević, Branka, "Development of genistein-loaded gold nanoparticles and their antitumor potential against prostate cancer cell lines" in Materials Science and Engineering: C, 124 (2021):112078,
https://doi.org/10.1016/j.msec.2021.112078 . .

TY  - CONF
AU  - Mašojević, Dijana
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Barudžija, Tanja
AU  - Škapin, Srečo
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12486
AB  - Nanocomposite materials based on conductive polymers and metal nanoparticles made an appearance as a new class of hybrid materials with considerable potential for application in different fields, from medical and food/wastewater treatments to catalysis and sensors. Besides their low cost and ease of preparation, their optical and mechanical characteristics are tunable, while individual features of each component become more obvious, and new ones appear. In this group of materials, newly, chemically synthesized Cobalt@Polypyrrole (Co@PPy) and Cobalt/Gold@Polypyrrole (Co/Au@PPy) nanocomposites could be classified. With low electrode potential, Co nanoparticles (CoNPs) are unstable, prone to oxidation and agglomeration. For this reason, both nanocomposites were synthesized under argon. Firstly, CoNPs were synthesized in water, by simple reduction of Co2+ by sodium borohydride and in the presence of sodium dodecyl sulfate as a surfactant that will stabilize formed Co nuclei and affect their further growth. After adding pyrrole monomer, the polymerization reaction was initiated by ammonium peroxydisulfate and Au3+ for Co@PPy and Co/Au@PPy, respectively. Together with pyrrole monomer oxidation to final polymer structure by Au3+, these ions are reduced by nitrogen atoms from secondary amino groups in pyrrole units, forming AuNPs incorporated throughout polymer matrix. Conductive form of both nanocomposites, i.e., the presence of bipolarons, was confirmed by UV-Vis and FTIR analysis, while FESEM showed granular morphologies. With both nanocomposites having satisfactory percentage of metals incorporated, it could be expected that such materials could find their place in the field of catalysis, direct borohydride fuel cell, or wastewater treatment, where heavy, toxic metals such As(III) is, represent a great danger for the environment.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
T1  - Nanostructured Cobalt@Polypyrrole and Cobalt/Gold@Polypyrrole materials: synthesis, optical and structural properties
SP  - 135
EP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12486
ER  - 

@conference{
author = "Mašojević, Dijana and Stamenović, Una and Vodnik, Vesna and Barudžija, Tanja and Škapin, Srečo",
year = "2021",
abstract = "Nanocomposite materials based on conductive polymers and metal nanoparticles made an appearance as a new class of hybrid materials with considerable potential for application in different fields, from medical and food/wastewater treatments to catalysis and sensors. Besides their low cost and ease of preparation, their optical and mechanical characteristics are tunable, while individual features of each component become more obvious, and new ones appear. In this group of materials, newly, chemically synthesized Cobalt@Polypyrrole (Co@PPy) and Cobalt/Gold@Polypyrrole (Co/Au@PPy) nanocomposites could be classified. With low electrode potential, Co nanoparticles (CoNPs) are unstable, prone to oxidation and agglomeration. For this reason, both nanocomposites were synthesized under argon. Firstly, CoNPs were synthesized in water, by simple reduction of Co2+ by sodium borohydride and in the presence of sodium dodecyl sulfate as a surfactant that will stabilize formed Co nuclei and affect their further growth. After adding pyrrole monomer, the polymerization reaction was initiated by ammonium peroxydisulfate and Au3+ for Co@PPy and Co/Au@PPy, respectively. Together with pyrrole monomer oxidation to final polymer structure by Au3+, these ions are reduced by nitrogen atoms from secondary amino groups in pyrrole units, forming AuNPs incorporated throughout polymer matrix. Conductive form of both nanocomposites, i.e., the presence of bipolarons, was confirmed by UV-Vis and FTIR analysis, while FESEM showed granular morphologies. With both nanocomposites having satisfactory percentage of metals incorporated, it could be expected that such materials could find their place in the field of catalysis, direct borohydride fuel cell, or wastewater treatment, where heavy, toxic metals such As(III) is, represent a great danger for the environment.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts",
title = "Nanostructured Cobalt@Polypyrrole and Cobalt/Gold@Polypyrrole materials: synthesis, optical and structural properties",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12486"
}

Mašojević, D., Stamenović, U., Vodnik, V., Barudžija, T.,& Škapin, S.. (2021). Nanostructured Cobalt@Polypyrrole and Cobalt/Gold@Polypyrrole materials: synthesis, optical and structural properties. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., 135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12486

Mašojević D, Stamenović U, Vodnik V, Barudžija T, Škapin S. Nanostructured Cobalt@Polypyrrole and Cobalt/Gold@Polypyrrole materials: synthesis, optical and structural properties. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts. 2021;:135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12486 .

Mašojević, Dijana, Stamenović, Una, Vodnik, Vesna, Barudžija, Tanja, Škapin, Srečo, "Nanostructured Cobalt@Polypyrrole and Cobalt/Gold@Polypyrrole materials: synthesis, optical and structural properties" in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts (2021):135-135,
https://hdl.handle.net/21.15107/rcub_vinar_12486 .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Spasojević, Jelena
AU  - Radosavljević, Aleksandra
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12488
AB  - In recent years, photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers that absorb light energy and convert it to thermal energy, causing reversible mechanical deformation such as bending, curling, and spiraling. This work describes hydrogel nanocomposite photoactuators based on AuNPs and thermosensitive poly(N-isopropylacrylamide) (Au-PNiPAAm), obtained by gamma irradiation. The different shapes of AuNPs were incorporated into PNiPAAm hydrogel, nanospheres with radius  5-10 nm and nanorods with aspect ratio  5 (radius  10 nm, length  50 nm). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators were investigated in water at 25C and 48C, respectively. All samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport) indicating that incorporation of different shapes of AuNPs into matrices has no influence on the diffusion model. On the other hand, the volume phase transition temperature (VPTT) of photoactuators can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from  32.5C for Au nanorods to  30.5C for Au nanospheres, causing a more pronounced photothermal effect in the case of nanospheres.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
T1  - Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation
SP  - 137
EP  - 137
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12488
ER  - 

@conference{
author = "Nikolić, Nikolina and Spasojević, Jelena and Radosavljević, Aleksandra and Stamenović, Una and Vodnik, Vesna and Kačarević-Popović, Zorica",
year = "2021",
abstract = "In recent years, photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers that absorb light energy and convert it to thermal energy, causing reversible mechanical deformation such as bending, curling, and spiraling. This work describes hydrogel nanocomposite photoactuators based on AuNPs and thermosensitive poly(N-isopropylacrylamide) (Au-PNiPAAm), obtained by gamma irradiation. The different shapes of AuNPs were incorporated into PNiPAAm hydrogel, nanospheres with radius  5-10 nm and nanorods with aspect ratio  5 (radius  10 nm, length  50 nm). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators were investigated in water at 25C and 48C, respectively. All samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport) indicating that incorporation of different shapes of AuNPs into matrices has no influence on the diffusion model. On the other hand, the volume phase transition temperature (VPTT) of photoactuators can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from  32.5C for Au nanorods to  30.5C for Au nanospheres, causing a more pronounced photothermal effect in the case of nanospheres.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts",
title = "Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation",
pages = "137-137",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12488"
}

Nikolić, N., Spasojević, J., Radosavljević, A., Stamenović, U., Vodnik, V.,& Kačarević-Popović, Z.. (2021). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., 137-137.
https://hdl.handle.net/21.15107/rcub_vinar_12488

Nikolić N, Spasojević J, Radosavljević A, Stamenović U, Vodnik V, Kačarević-Popović Z. Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts. 2021;:137-137.
https://hdl.handle.net/21.15107/rcub_vinar_12488 .

Nikolić, Nikolina, Spasojević, Jelena, Radosavljević, Aleksandra, Stamenović, Una, Vodnik, Vesna, Kačarević-Popović, Zorica, "Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation" in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts (2021):137-137,
https://hdl.handle.net/21.15107/rcub_vinar_12488 .

TY  - JOUR
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Gavrilov, Nemanja M.
AU  - Pašti, Igor A.
AU  - Otončar, Mojca
AU  - Mitrić, Miodrag
AU  - Škapin, Srečo Davor
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8512
AB  - There is a need for developing new and perspective materials for oxygen reduction reaction (ORR) as one of the most essential reactions in the life processes, energy storage, and conversion, in order to exchange the most often used materials based on platinum supported/unsupported substrates, especially carbon supports. Herein, we present low-cost alternative electrode materials consisting of two silver@polyvinylpyrrolidone-polyaniline (Ag@PVP-PANI) nanocomposites that showed great potential as Pt-free ORR electrocatalysts. Simple and effective polymerization processes of aniline in the methanol, using PVP as shape-mediated stabilizator and stimulator of its oxidation by silver ions, led to the formation of nanocomposites with truncated triangular silver nanoparticles dispersed throughout granular and wrinkle-like surfaces of PANI matrix. The behavior of PVP chains in acidic conditions showed great influence on nanocomposites’ conductivities, regardless of the high silver content. Electrocatalytic survey of nanocomposites examined in alkaline media toward ORR pointed out their appreciable activities with high ORR onset potentials. Moreover, for the nanocomposite with lower silver content (18.9 wt. %), the four-electron ORR pathway was evidenced. © 2019 Elsevier B.V.
T2  - Synthetic Metals
T1  - Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites
VL  - 257
SP  - 116173
DO  - 10.1016/j.synthmet.2019.116173
ER  - 

@article{
author = "Stamenović, Una and Vodnik, Vesna and Gavrilov, Nemanja M. and Pašti, Igor A. and Otončar, Mojca and Mitrić, Miodrag and Škapin, Srečo Davor",
year = "2019",
abstract = "There is a need for developing new and perspective materials for oxygen reduction reaction (ORR) as one of the most essential reactions in the life processes, energy storage, and conversion, in order to exchange the most often used materials based on platinum supported/unsupported substrates, especially carbon supports. Herein, we present low-cost alternative electrode materials consisting of two silver@polyvinylpyrrolidone-polyaniline (Ag@PVP-PANI) nanocomposites that showed great potential as Pt-free ORR electrocatalysts. Simple and effective polymerization processes of aniline in the methanol, using PVP as shape-mediated stabilizator and stimulator of its oxidation by silver ions, led to the formation of nanocomposites with truncated triangular silver nanoparticles dispersed throughout granular and wrinkle-like surfaces of PANI matrix. The behavior of PVP chains in acidic conditions showed great influence on nanocomposites’ conductivities, regardless of the high silver content. Electrocatalytic survey of nanocomposites examined in alkaline media toward ORR pointed out their appreciable activities with high ORR onset potentials. Moreover, for the nanocomposite with lower silver content (18.9 wt. %), the four-electron ORR pathway was evidenced. © 2019 Elsevier B.V.",
journal = "Synthetic Metals",
title = "Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites",
volume = "257",
pages = "116173",
doi = "10.1016/j.synthmet.2019.116173"
}

Stamenović, U., Vodnik, V., Gavrilov, N. M., Pašti, I. A., Otončar, M., Mitrić, M.,& Škapin, S. D.. (2019). Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites. in Synthetic Metals, 257, 116173.
https://doi.org/10.1016/j.synthmet.2019.116173

Stamenović U, Vodnik V, Gavrilov NM, Pašti IA, Otončar M, Mitrić M, Škapin SD. Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites. in Synthetic Metals. 2019;257:116173.
doi:10.1016/j.synthmet.2019.116173 .

Stamenović, Una, Vodnik, Vesna, Gavrilov, Nemanja M., Pašti, Igor A., Otončar, Mojca, Mitrić, Miodrag, Škapin, Srečo Davor, "Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites" in Synthetic Metals, 257 (2019):116173,
https://doi.org/10.1016/j.synthmet.2019.116173 . .

TY  - CHAP
AU  - Vodnik, Vesna
AU  - Bogdanović, Una
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8850
AB  - The past few years have witnessed the tremendous potential and development of metal nanoparticles due to their strong optical absorption and scattering, an effect called localized surface plasmon resonance, which makes them useful in a wide spectrum of biomedical utilities such as imaging, sensing, drug delivery, gene targeting, and treatment of some cancers. This chapter highlights the Au, Ag, and Cu nanoparticles currently investigated in the field of health and medicine, focusing on individual and particularly polymer/organic molecule-functionalized nanoparticles-which is often employed to prevent them from agglomeration and oxidation, as well as for biofunctionalization. An overview of the synthesis, properties, and surface modifications of these nanomaterials, with particular attention to their challenges and perspectives for relevant biomedical applications, is provided. In addition to the citation of some recent advances in biomedicine, we draw attention to our study on these nanosystems that have biological or other related applications. © 2019 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Materials for biomedical engineering: Inorganic micro and nanostructures
T1  - Metal nanoparticles and their composites: a promising multifunctional nanomaterial for biomedical and related applications
SP  - 397
EP  - 426
DO  - 10.1016/B978-0-08-102814-8.00014-7
ER  - 

@inbook{
author = "Vodnik, Vesna and Bogdanović, Una",
year = "2019",
abstract = "The past few years have witnessed the tremendous potential and development of metal nanoparticles due to their strong optical absorption and scattering, an effect called localized surface plasmon resonance, which makes them useful in a wide spectrum of biomedical utilities such as imaging, sensing, drug delivery, gene targeting, and treatment of some cancers. This chapter highlights the Au, Ag, and Cu nanoparticles currently investigated in the field of health and medicine, focusing on individual and particularly polymer/organic molecule-functionalized nanoparticles-which is often employed to prevent them from agglomeration and oxidation, as well as for biofunctionalization. An overview of the synthesis, properties, and surface modifications of these nanomaterials, with particular attention to their challenges and perspectives for relevant biomedical applications, is provided. In addition to the citation of some recent advances in biomedicine, we draw attention to our study on these nanosystems that have biological or other related applications. © 2019 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Materials for biomedical engineering: Inorganic micro and nanostructures",
booktitle = "Metal nanoparticles and their composites: a promising multifunctional nanomaterial for biomedical and related applications",
pages = "397-426",
doi = "10.1016/B978-0-08-102814-8.00014-7"
}

Vodnik, V.,& Bogdanović, U.. (2019). Metal nanoparticles and their composites: a promising multifunctional nanomaterial for biomedical and related applications. in Materials for biomedical engineering: Inorganic micro and nanostructures
Elsevier., 397-426.
https://doi.org/10.1016/B978-0-08-102814-8.00014-7

Vodnik V, Bogdanović U. Metal nanoparticles and their composites: a promising multifunctional nanomaterial for biomedical and related applications. in Materials for biomedical engineering: Inorganic micro and nanostructures. 2019;:397-426.
doi:10.1016/B978-0-08-102814-8.00014-7 .

Vodnik, Vesna, Bogdanović, Una, "Metal nanoparticles and their composites: a promising multifunctional nanomaterial for biomedical and related applications" in Materials for biomedical engineering: Inorganic micro and nanostructures (2019):397-426,
https://doi.org/10.1016/B978-0-08-102814-8.00014-7 . .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Ahrenkiel, Scott Phillip
AU  - Šljukić, Biljana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8609
AB  - Two gold nanorod-polyaniline (Au-PANI) composites with different contents of Au were prepared by two methods. An ex situ method, in the presence of preformed gold nanorods (AuNRs) and in situ one, when an AuNRs and PANI matrix is produced simultaneously, were used. Both methods were performed in immiscible water/toluene biphasic system as a simple interfacial polymerization process. Optical, structural and morphological characteristics of the formed nanocomposites were identified. It was found that AuNRs are embedded in the conducting emeraldine salt form of PANI. Nanocomposites containing 2.0 and 28.9 wt% of Au were subsequently systematically studied for borohydride oxidation reaction (BOR) for potential application in direct borohydride-peroxide fuel cell (DBPFC). Reaction parameters: number of electrons exchanged, order of reaction and activation energy, were evaluated. Both Au-PANI nanocomposites showed activity for BOR. A laboratory DBPFC was tested reaching specific peak power density of 184 Wg(-1) at 65 degrees C with Au-PANI 1 nanocomposite (containing only 2.0 wt% of Au) as anode.
T2  - Electrochimica Acta
T1  - Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells
VL  - 328
SP  - 135115
DO  - 10.1016/j.electacta.2019.135115
ER  - 

@article{
author = "Milikić, Jadranka and Stamenović, Una and Vodnik, Vesna and Ahrenkiel, Scott Phillip and Šljukić, Biljana",
year = "2019",
abstract = "Two gold nanorod-polyaniline (Au-PANI) composites with different contents of Au were prepared by two methods. An ex situ method, in the presence of preformed gold nanorods (AuNRs) and in situ one, when an AuNRs and PANI matrix is produced simultaneously, were used. Both methods were performed in immiscible water/toluene biphasic system as a simple interfacial polymerization process. Optical, structural and morphological characteristics of the formed nanocomposites were identified. It was found that AuNRs are embedded in the conducting emeraldine salt form of PANI. Nanocomposites containing 2.0 and 28.9 wt% of Au were subsequently systematically studied for borohydride oxidation reaction (BOR) for potential application in direct borohydride-peroxide fuel cell (DBPFC). Reaction parameters: number of electrons exchanged, order of reaction and activation energy, were evaluated. Both Au-PANI nanocomposites showed activity for BOR. A laboratory DBPFC was tested reaching specific peak power density of 184 Wg(-1) at 65 degrees C with Au-PANI 1 nanocomposite (containing only 2.0 wt% of Au) as anode.",
journal = "Electrochimica Acta",
title = "Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells",
volume = "328",
pages = "135115",
doi = "10.1016/j.electacta.2019.135115"
}

Milikić, J., Stamenović, U., Vodnik, V., Ahrenkiel, S. P.,& Šljukić, B.. (2019). Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells. in Electrochimica Acta, 328, 135115.
https://doi.org/10.1016/j.electacta.2019.135115

Milikić J, Stamenović U, Vodnik V, Ahrenkiel SP, Šljukić B. Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells. in Electrochimica Acta. 2019;328:135115.
doi:10.1016/j.electacta.2019.135115 .

Milikić, Jadranka, Stamenović, Una, Vodnik, Vesna, Ahrenkiel, Scott Phillip, Šljukić, Biljana, "Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells" in Electrochimica Acta, 328 (2019):135115,
https://doi.org/10.1016/j.electacta.2019.135115 . .

TY  - JOUR
AU  - Ralević, Uroš
AU  - Isic, Goran
AU  - Vasić Anićijević, Dragana D.
AU  - Laban, Bojana B.
AU  - Bogdanović, Una
AU  - Lazović, Vladimir M.
AU  - Vodnik, Vesna
AU  - Gajic, Rados
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1890
AB  - The adsorption of thiacyanine dye molecules on citrate-stabilized silver nanoparticle clusters drop-cast onto freshly cleaved mica or highly oriented pyrolytic graphite surfaces is examined using colocalized surface-enhanced Raman spectroscopy and atomic force microscopy. The incidence of dye Raman signatures in photoluminescence hotspots identified around nanoparticle clusters is considered for both citrate- and borate-capped silver nanoparticles and found to be substantially lower in the former case, suggesting that the citrate anions impede the efficient dye adsorption. Rigorous numerical simulations of light scattering on random nanoparticle clusters are used for estimating the electromagnetic enhancement and elucidating the hotspot formation mechanism. The majority of the enhanced Raman signal, estimated to be more than 90%, is found to originate from the nanogaps between adjacent nanoparticles in the cluster, regardless of the cluster size and geometry. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters
VL  - 434
SP  - 540
EP  - 548
DO  - 10.1016/j.apsusc.2017.10.148
ER  - 

@article{
author = "Ralević, Uroš and Isic, Goran and Vasić Anićijević, Dragana D. and Laban, Bojana B. and Bogdanović, Una and Lazović, Vladimir M. and Vodnik, Vesna and Gajic, Rados",
year = "2018",
abstract = "The adsorption of thiacyanine dye molecules on citrate-stabilized silver nanoparticle clusters drop-cast onto freshly cleaved mica or highly oriented pyrolytic graphite surfaces is examined using colocalized surface-enhanced Raman spectroscopy and atomic force microscopy. The incidence of dye Raman signatures in photoluminescence hotspots identified around nanoparticle clusters is considered for both citrate- and borate-capped silver nanoparticles and found to be substantially lower in the former case, suggesting that the citrate anions impede the efficient dye adsorption. Rigorous numerical simulations of light scattering on random nanoparticle clusters are used for estimating the electromagnetic enhancement and elucidating the hotspot formation mechanism. The majority of the enhanced Raman signal, estimated to be more than 90%, is found to originate from the nanogaps between adjacent nanoparticles in the cluster, regardless of the cluster size and geometry. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters",
volume = "434",
pages = "540-548",
doi = "10.1016/j.apsusc.2017.10.148"
}

Ralević, U., Isic, G., Vasić Anićijević, D. D., Laban, B. B., Bogdanović, U., Lazović, V. M., Vodnik, V.,& Gajic, R.. (2018). Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters. in Applied Surface Science, 434, 540-548.
https://doi.org/10.1016/j.apsusc.2017.10.148

Ralević U, Isic G, Vasić Anićijević DD, Laban BB, Bogdanović U, Lazović VM, Vodnik V, Gajic R. Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters. in Applied Surface Science. 2018;434:540-548.
doi:10.1016/j.apsusc.2017.10.148 .

Ralević, Uroš, Isic, Goran, Vasić Anićijević, Dragana D., Laban, Bojana B., Bogdanović, Una, Lazović, Vladimir M., Vodnik, Vesna, Gajic, Rados, "Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters" in Applied Surface Science, 434 (2018):540-548,
https://doi.org/10.1016/j.apsusc.2017.10.148 . .

TY  - JOUR
AU  - Stamenović, Una
AU  - Gavrilov, Nemanja M.
AU  - Pašti, Igor A.
AU  - Otoničar, Mojca
AU  - Ćirić-Marjanović, Gordana N.
AU  - Škapin, Srečo Davor
AU  - Mitrić, Miodrag
AU  - Vodnik, Vesna
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0013468618312799
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7717
AB  - A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts.
T2  - Electrochimica Acta
T1  - One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction
VL  - 281
SP  - 549
EP  - 561
DO  - 10.1016/j.electacta.2018.05.202
ER  - 

@article{
author = "Stamenović, Una and Gavrilov, Nemanja M. and Pašti, Igor A. and Otoničar, Mojca and Ćirić-Marjanović, Gordana N. and Škapin, Srečo Davor and Mitrić, Miodrag and Vodnik, Vesna",
year = "2018",
abstract = "A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts.",
journal = "Electrochimica Acta",
title = "One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction",
volume = "281",
pages = "549-561",
doi = "10.1016/j.electacta.2018.05.202"
}

Stamenović, U., Gavrilov, N. M., Pašti, I. A., Otoničar, M., Ćirić-Marjanović, G. N., Škapin, S. D., Mitrić, M.,& Vodnik, V.. (2018). One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction. in Electrochimica Acta, 281, 549-561.
https://doi.org/10.1016/j.electacta.2018.05.202

Stamenović U, Gavrilov NM, Pašti IA, Otoničar M, Ćirić-Marjanović GN, Škapin SD, Mitrić M, Vodnik V. One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction. in Electrochimica Acta. 2018;281:549-561.
doi:10.1016/j.electacta.2018.05.202 .

Stamenović, Una, Gavrilov, Nemanja M., Pašti, Igor A., Otoničar, Mojca, Ćirić-Marjanović, Gordana N., Škapin, Srečo Davor, Mitrić, Miodrag, Vodnik, Vesna, "One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction" in Electrochimica Acta, 281 (2018):549-561,
https://doi.org/10.1016/j.electacta.2018.05.202 . .

TY  - JOUR
AU  - Bogdanović, Una
AU  - Dimitrijević, Suzana I.
AU  - Škapin, Srečo Davor
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Leskovac, Andreja
AU  - Petrović, Sandra
AU  - Stoiljković, Milovan
AU  - Vodnik, Vesna
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0928493117326449
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7799
AB  - Copper nanoparticles (Cu NPs) have proven to own excellent antimicrobial efficacy, but the problems of easy oxidation and aggregation limit their practical application. Here, nanocomposite based on polyaniline (PANI) and Cu NPs solved this problem and brought additional physicochemical properties that are markedly advantageous for antimicrobial applications. Current work exploits this potential, to examine its time- and concentration-dependent antimicrobial activity, employing E. coli, S. aureus, and C. albicans as a model microbial species. Regarding the presence of polaronic charge carriers in the fibrous polyaniline network, effects of Cu NPs’ size and their partially oxidized surfaces (the data were confirmed by HRTEM, FESEM, XRD, Raman and XPS analysis), as well as rapid copper ions release, Cu-PANI nanocomposite showed efficient bactericidal and fungicidal activities at the concentrations ≤1 ppm, within the incubation time of 2 h. Beside the quantitative analysis, the high levels of cellular disruption for all tested microbes were evidenced by atomic force microscopy. Moreover, the minimum inhibitory and bactericidal concentrations of the Cu-PANI nanocomposite were lower than those reported for other nanocomposites. Using such low concentrations is recognized as a good way to avoid its toxicity toward the environment. For this purpose, Cu-PANI nanocomposite is tested for its genotoxicity and influence on the oxidative status of the human cells in vitro.
T2  - Materials Science and Engineering: C
T1  - Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation
VL  - 93
SP  - 49
EP  - 60
DO  - 10.1016/j.msec.2018.07.067
ER  - 

@article{
author = "Bogdanović, Una and Dimitrijević, Suzana I. and Škapin, Srečo Davor and Popović, Maja and Rakočević, Zlatko Lj. and Leskovac, Andreja and Petrović, Sandra and Stoiljković, Milovan and Vodnik, Vesna",
year = "2018",
abstract = "Copper nanoparticles (Cu NPs) have proven to own excellent antimicrobial efficacy, but the problems of easy oxidation and aggregation limit their practical application. Here, nanocomposite based on polyaniline (PANI) and Cu NPs solved this problem and brought additional physicochemical properties that are markedly advantageous for antimicrobial applications. Current work exploits this potential, to examine its time- and concentration-dependent antimicrobial activity, employing E. coli, S. aureus, and C. albicans as a model microbial species. Regarding the presence of polaronic charge carriers in the fibrous polyaniline network, effects of Cu NPs’ size and their partially oxidized surfaces (the data were confirmed by HRTEM, FESEM, XRD, Raman and XPS analysis), as well as rapid copper ions release, Cu-PANI nanocomposite showed efficient bactericidal and fungicidal activities at the concentrations ≤1 ppm, within the incubation time of 2 h. Beside the quantitative analysis, the high levels of cellular disruption for all tested microbes were evidenced by atomic force microscopy. Moreover, the minimum inhibitory and bactericidal concentrations of the Cu-PANI nanocomposite were lower than those reported for other nanocomposites. Using such low concentrations is recognized as a good way to avoid its toxicity toward the environment. For this purpose, Cu-PANI nanocomposite is tested for its genotoxicity and influence on the oxidative status of the human cells in vitro.",
journal = "Materials Science and Engineering: C",
title = "Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation",
volume = "93",
pages = "49-60",
doi = "10.1016/j.msec.2018.07.067"
}

Bogdanović, U., Dimitrijević, S. I., Škapin, S. D., Popović, M., Rakočević, Z. Lj., Leskovac, A., Petrović, S., Stoiljković, M.,& Vodnik, V.. (2018). Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation. in Materials Science and Engineering: C, 93, 49-60.
https://doi.org/10.1016/j.msec.2018.07.067

Bogdanović U, Dimitrijević SI, Škapin SD, Popović M, Rakočević ZL, Leskovac A, Petrović S, Stoiljković M, Vodnik V. Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation. in Materials Science and Engineering: C. 2018;93:49-60.
doi:10.1016/j.msec.2018.07.067 .

Bogdanović, Una, Dimitrijević, Suzana I., Škapin, Srečo Davor, Popović, Maja, Rakočević, Zlatko Lj., Leskovac, Andreja, Petrović, Sandra, Stoiljković, Milovan, Vodnik, Vesna, "Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation" in Materials Science and Engineering: C, 93 (2018):49-60,
https://doi.org/10.1016/j.msec.2018.07.067 . .

TY  - CONF
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Otoničar, Mojca
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8735
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - Metal Nanoparticles-PANI Nanocomposites and their Applications
SP  - 157
EP  - 159
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8735
ER  - 

@conference{
author = "Stamenović, Una and Vodnik, Vesna and Otoničar, Mojca",
year = "2018",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "Metal Nanoparticles-PANI Nanocomposites and their Applications",
pages = "157-159",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8735"
}

Stamenović, U., Vodnik, V.,& Otoničar, M.. (2018). Metal Nanoparticles-PANI Nanocomposites and their Applications. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 157-159.
https://hdl.handle.net/21.15107/rcub_vinar_8735

Stamenović U, Vodnik V, Otoničar M. Metal Nanoparticles-PANI Nanocomposites and their Applications. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:157-159.
https://hdl.handle.net/21.15107/rcub_vinar_8735 .

Stamenović, Una, Vodnik, Vesna, Otoničar, Mojca, "Metal Nanoparticles-PANI Nanocomposites and their Applications" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):157-159,
https://hdl.handle.net/21.15107/rcub_vinar_8735 .