TY  - JOUR
AU  - Dojčilović, Radovan
AU  - Pajović, Jelena D.
AU  - Božanić, Dušan K.
AU  - Bogdanović, Una
AU  - Vodnik, Vesna
AU  - Dimitrijević-Branković, Suzana
AU  - Miljković, Miona
AU  - Kascakova, Slavka
AU  - Refregiers, Matthieu
AU  - Đoković, Vladimir
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3726
AB  - The interaction of the tryptophan functionalized Ag nanoparticles and live Candida albicans cells was studied by synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging at the DISCO beamline of Synchrotron SOLEIL. DUV imaging showed that incubation of the fungus with functionalized nanoparticles results in significant increase in the fluorescence signal. The analysis of the images revealed that the interaction of the nanoparticles with (pseudo)hyphae polymorphs of the diploid fungus was less pronounced than in the case of yeast cells or budding spores. The changes in the intensity of the fluorescence signals of the cells after incubation were followed in [327-353 nm] and [370-410 nm] spectral ranges that correspond to the fluorescence of tryptophan in non-polar and polar environment, respectively. As a consequence of the environmental sensitivity of the silver-tryptophan fluorescent nanoprobe, we were able to determine the possible accumulation sites of the nanoparticles. The analysis of the intensity decay kinetics showed that the photobleaching effects were more pronounced in the case of the functionalized nanoparticle treated cells. The results of time-integrated emission in the mentioned spectral ranges suggested that the nanoparticles penetrate the cells, but that the majority of the nanoparticles attach to the cells' surfaces.
PB  - Elsevier Science Bv, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Interaction of amino acid-functionalized silver nanoparticles and Candida albicans polymorphs: A deep-UV fluorescence imaging study
EP  - 348
SP  - 341
VL  - 155
DO  - 10.1016/j.colsurfb.2017.04.044
ER  - 

@article{
author = "Dojčilović, Radovan and Pajović, Jelena D. and Božanić, Dušan K. and Bogdanović, Una and Vodnik, Vesna and Dimitrijević-Branković, Suzana and Miljković, Miona and Kascakova, Slavka and Refregiers, Matthieu and Đoković, Vladimir",
year = "2017",
abstract = "The interaction of the tryptophan functionalized Ag nanoparticles and live Candida albicans cells was studied by synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging at the DISCO beamline of Synchrotron SOLEIL. DUV imaging showed that incubation of the fungus with functionalized nanoparticles results in significant increase in the fluorescence signal. The analysis of the images revealed that the interaction of the nanoparticles with (pseudo)hyphae polymorphs of the diploid fungus was less pronounced than in the case of yeast cells or budding spores. The changes in the intensity of the fluorescence signals of the cells after incubation were followed in [327-353 nm] and [370-410 nm] spectral ranges that correspond to the fluorescence of tryptophan in non-polar and polar environment, respectively. As a consequence of the environmental sensitivity of the silver-tryptophan fluorescent nanoprobe, we were able to determine the possible accumulation sites of the nanoparticles. The analysis of the intensity decay kinetics showed that the photobleaching effects were more pronounced in the case of the functionalized nanoparticle treated cells. The results of time-integrated emission in the mentioned spectral ranges suggested that the nanoparticles penetrate the cells, but that the majority of the nanoparticles attach to the cells' surfaces.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Interaction of amino acid-functionalized silver nanoparticles and Candida albicans polymorphs: A deep-UV fluorescence imaging study",
pages = "348-341",
volume = "155",
doi = "10.1016/j.colsurfb.2017.04.044"
}

Dojčilović, R., Pajović, J. D., Božanić, D. K., Bogdanović, U., Vodnik, V., Dimitrijević-Branković, S., Miljković, M., Kascakova, S., Refregiers, M.,& Đoković, V.. (2017). Interaction of amino acid-functionalized silver nanoparticles and Candida albicans polymorphs: A deep-UV fluorescence imaging study. in Colloids and Surfaces B-Biointerfaces
Elsevier Science Bv, Amsterdam., 155, 341-348.
https://doi.org/10.1016/j.colsurfb.2017.04.044

Dojčilović R, Pajović JD, Božanić DK, Bogdanović U, Vodnik V, Dimitrijević-Branković S, Miljković M, Kascakova S, Refregiers M, Đoković V. Interaction of amino acid-functionalized silver nanoparticles and Candida albicans polymorphs: A deep-UV fluorescence imaging study. in Colloids and Surfaces B-Biointerfaces. 2017;155:341-348.
doi:10.1016/j.colsurfb.2017.04.044 .

Dojčilović, Radovan, Pajović, Jelena D., Božanić, Dušan K., Bogdanović, Una, Vodnik, Vesna, Dimitrijević-Branković, Suzana, Miljković, Miona, Kascakova, Slavka, Refregiers, Matthieu, Đoković, Vladimir, "Interaction of amino acid-functionalized silver nanoparticles and Candida albicans polymorphs: A deep-UV fluorescence imaging study" in Colloids and Surfaces B-Biointerfaces, 155 (2017):341-348,
https://doi.org/10.1016/j.colsurfb.2017.04.044 . .

TY  - JOUR
AU  - Pajović, Jelena D.
AU  - Dojčilović, Radovan
AU  - Božanić, Dušan K.
AU  - Vodnik, Vesna
AU  - Dimitrijević-Branković, Suzana
AU  - Kascakova, Slavka
AU  - Refregiers, Matthieu
AU  - Markelić, Milica
AU  - Đoković, Vladimir
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3256
AB  - Fluorescent nanostructures were prepared by functionalization of gold nanoparticles with riboflavin molecules and used as probes for synchrotron radiation deep ultraviolet (SR-DUV) fluorescence imaging of gluteraldehyde-fixed Candida albicans cells. The nanoparticles were characterized by transmission electron microscopy (TEM) and optical spectroscopy techniques. The TEM analysis showed that the nanostructures were 6 nm in diameter, while the results of the fluorescence spectroscopies confirmed the photoluminescence of the nanoparticles. The SR-DUV imaging showed that it was possible to distinguish the fluorescence of the nanoparticles from the autofluorescence of the cells, as well as that the local maxima of the signal pertaining to the fluorescence of goldriboflavin nanostructures were mostly positioned on the surfaces of the C. albicans cells of spherical morphology.
PB  - Springer, Dordrecht
T2  - Optical and Quantum Electronics
T1  - Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids
IS  - 6
VL  - 48
DO  - 10.1007/s11082-016-0578-y
ER  - 

@article{
author = "Pajović, Jelena D. and Dojčilović, Radovan and Božanić, Dušan K. and Vodnik, Vesna and Dimitrijević-Branković, Suzana and Kascakova, Slavka and Refregiers, Matthieu and Markelić, Milica and Đoković, Vladimir",
year = "2016",
abstract = "Fluorescent nanostructures were prepared by functionalization of gold nanoparticles with riboflavin molecules and used as probes for synchrotron radiation deep ultraviolet (SR-DUV) fluorescence imaging of gluteraldehyde-fixed Candida albicans cells. The nanoparticles were characterized by transmission electron microscopy (TEM) and optical spectroscopy techniques. The TEM analysis showed that the nanostructures were 6 nm in diameter, while the results of the fluorescence spectroscopies confirmed the photoluminescence of the nanoparticles. The SR-DUV imaging showed that it was possible to distinguish the fluorescence of the nanoparticles from the autofluorescence of the cells, as well as that the local maxima of the signal pertaining to the fluorescence of goldriboflavin nanostructures were mostly positioned on the surfaces of the C. albicans cells of spherical morphology.",
publisher = "Springer, Dordrecht",
journal = "Optical and Quantum Electronics",
title = "Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids",
number = "6",
volume = "48",
doi = "10.1007/s11082-016-0578-y"
}

Pajović, J. D., Dojčilović, R., Božanić, D. K., Vodnik, V., Dimitrijević-Branković, S., Kascakova, S., Refregiers, M., Markelić, M.,& Đoković, V.. (2016). Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids. in Optical and Quantum Electronics
Springer, Dordrecht., 48(6).
https://doi.org/10.1007/s11082-016-0578-y

Pajović JD, Dojčilović R, Božanić DK, Vodnik V, Dimitrijević-Branković S, Kascakova S, Refregiers M, Markelić M, Đoković V. Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids. in Optical and Quantum Electronics. 2016;48(6).
doi:10.1007/s11082-016-0578-y .

Pajović, Jelena D., Dojčilović, Radovan, Božanić, Dušan K., Vodnik, Vesna, Dimitrijević-Branković, Suzana, Kascakova, Slavka, Refregiers, Matthieu, Markelić, Milica, Đoković, Vladimir, "Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids" in Optical and Quantum Electronics, 48, no. 6 (2016),
https://doi.org/10.1007/s11082-016-0578-y . .

TY  - JOUR
AU  - Dojčilović, Radovan
AU  - Pajović, Jelena D.
AU  - Božanić, Dušan K.
AU  - Vodnik, Vesna
AU  - Dimitrijević-Branković, Suzana
AU  - Milosavljević, Aleksandar R.
AU  - Kascakova, Slavka
AU  - Refregiers, Matthieu
AU  - Đoković, Vladimir
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3454
AB  - The investigation of the interaction of silver nanoparticles and live bacteria cells is of particular importance for understanding and controlling their bactericidal properties. In this study, the process of internalization of silver nanoparticles in Escherichia coli cells was followed by means of synchrotron excitation deep ultraviolet (DUV) fluorescence imaging. Antimicrobial nanostructures that can absorb and emit light in the UV region were prepared by functionalization of silver nanoparticles with tryptophan amino acid and used as environmentally sensitive fluorescent probes. The nanostructures were characterized by morphological (TEM) and spectroscopic methods (UV-vis, FTIR, XPS, and photoluminescence). The TEM images and the analyses of the UV-vis spectra suggested that the addition of tryptophan led to the formation of hybrid nanostructures with pronounced eccentricity and larger sizes with respect to that of the initial silver nanoparticles. The DUV imaging showed that it was possible to distinguish the fluorescent signal pertaining to silver-tryptophan nanostructures from the autofluorescence of the bacteria. The spatial resolution of the fluorescence images was 154 nm which was sufficient to perform analyses of the accumulation of the nanostructures within a single bacterium. The DUV imaging results imply that the tryptophan-functionalized silver nanoparticles interact with cell membranes via insertion of the amino acid into the phospholipid bilayer and enter the cells.
PB  - Royal Soc Chemistry, Cambridge
T2  - Analyst
T1  - A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution
EP  - 1996
IS  - 6
SP  - 1988
VL  - 141
DO  - 10.1039/c5an02358k
ER  - 

@article{
author = "Dojčilović, Radovan and Pajović, Jelena D. and Božanić, Dušan K. and Vodnik, Vesna and Dimitrijević-Branković, Suzana and Milosavljević, Aleksandar R. and Kascakova, Slavka and Refregiers, Matthieu and Đoković, Vladimir",
year = "2016",
abstract = "The investigation of the interaction of silver nanoparticles and live bacteria cells is of particular importance for understanding and controlling their bactericidal properties. In this study, the process of internalization of silver nanoparticles in Escherichia coli cells was followed by means of synchrotron excitation deep ultraviolet (DUV) fluorescence imaging. Antimicrobial nanostructures that can absorb and emit light in the UV region were prepared by functionalization of silver nanoparticles with tryptophan amino acid and used as environmentally sensitive fluorescent probes. The nanostructures were characterized by morphological (TEM) and spectroscopic methods (UV-vis, FTIR, XPS, and photoluminescence). The TEM images and the analyses of the UV-vis spectra suggested that the addition of tryptophan led to the formation of hybrid nanostructures with pronounced eccentricity and larger sizes with respect to that of the initial silver nanoparticles. The DUV imaging showed that it was possible to distinguish the fluorescent signal pertaining to silver-tryptophan nanostructures from the autofluorescence of the bacteria. The spatial resolution of the fluorescence images was 154 nm which was sufficient to perform analyses of the accumulation of the nanostructures within a single bacterium. The DUV imaging results imply that the tryptophan-functionalized silver nanoparticles interact with cell membranes via insertion of the amino acid into the phospholipid bilayer and enter the cells.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Analyst",
title = "A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution",
pages = "1996-1988",
number = "6",
volume = "141",
doi = "10.1039/c5an02358k"
}

Dojčilović, R., Pajović, J. D., Božanić, D. K., Vodnik, V., Dimitrijević-Branković, S., Milosavljević, A. R., Kascakova, S., Refregiers, M.,& Đoković, V.. (2016). A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution. in Analyst
Royal Soc Chemistry, Cambridge., 141(6), 1988-1996.
https://doi.org/10.1039/c5an02358k

Dojčilović R, Pajović JD, Božanić DK, Vodnik V, Dimitrijević-Branković S, Milosavljević AR, Kascakova S, Refregiers M, Đoković V. A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution. in Analyst. 2016;141(6):1988-1996.
doi:10.1039/c5an02358k .

Dojčilović, Radovan, Pajović, Jelena D., Božanić, Dušan K., Vodnik, Vesna, Dimitrijević-Branković, Suzana, Milosavljević, Aleksandar R., Kascakova, Slavka, Refregiers, Matthieu, Đoković, Vladimir, "A fluorescent nanoprobe for single bacterium tracking: functionalization of silver nanoparticles with tryptophan to probe the nanoparticle accumulation with single cell resolution" in Analyst, 141, no. 6 (2016):1988-1996,
https://doi.org/10.1039/c5an02358k . .

TY  - JOUR
AU  - Pajović, Jelena D.
AU  - Dojčilović, Radovan
AU  - Božanić, Dušan K.
AU  - Kascakova, Slavka
AU  - Refregiers, Matthieu
AU  - Dimitrijević-Branković, Suzana
AU  - Vodnik, Vesna
AU  - Milosavljević, Aleksandar R.
AU  - Piscopiello, Emanuela
AU  - Luyt, Adriaan S.
AU  - Đoković, Vladimir
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3102
AB  - Biocompatible fluorescent nanostructures were prepared by a functionalization of gold nanoparticles with the amino acid tryptophan. The gold-tryptophan bioconjugates were investigated by TEM and HRTEM and various spectroscopy methods (XPS, FTIR, UV-vis and photoluminescence). It was found that the gold nanoparticles, initially 8 nm in diameter, aggregate in the presence of the amino acid. From the XPS and FTIR spectroscopy results, it was concluded that the tryptophan gold interactions mainly take place via indole and carboxyl groups. Although the indole group is involved in the interaction with the gold surfaces, the tryptophan-gold hybrids showed strong fluorescence due to the presence of multilayers of tryptophan. Deep ultra violet (DUV) imaging performed at the SOLEIL synchrotron showed that It is possible to detect these hybrid nanostructures within Escherichia coli cells.
PB  - Elsevier Science Bv, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells
EP  - 750
SP  - 742
VL  - 135
DO  - 10.1016/j.colsurfb.2015.08.050
ER  - 

@article{
author = "Pajović, Jelena D. and Dojčilović, Radovan and Božanić, Dušan K. and Kascakova, Slavka and Refregiers, Matthieu and Dimitrijević-Branković, Suzana and Vodnik, Vesna and Milosavljević, Aleksandar R. and Piscopiello, Emanuela and Luyt, Adriaan S. and Đoković, Vladimir",
year = "2015",
abstract = "Biocompatible fluorescent nanostructures were prepared by a functionalization of gold nanoparticles with the amino acid tryptophan. The gold-tryptophan bioconjugates were investigated by TEM and HRTEM and various spectroscopy methods (XPS, FTIR, UV-vis and photoluminescence). It was found that the gold nanoparticles, initially 8 nm in diameter, aggregate in the presence of the amino acid. From the XPS and FTIR spectroscopy results, it was concluded that the tryptophan gold interactions mainly take place via indole and carboxyl groups. Although the indole group is involved in the interaction with the gold surfaces, the tryptophan-gold hybrids showed strong fluorescence due to the presence of multilayers of tryptophan. Deep ultra violet (DUV) imaging performed at the SOLEIL synchrotron showed that It is possible to detect these hybrid nanostructures within Escherichia coli cells.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells",
pages = "750-742",
volume = "135",
doi = "10.1016/j.colsurfb.2015.08.050"
}

Pajović, J. D., Dojčilović, R., Božanić, D. K., Kascakova, S., Refregiers, M., Dimitrijević-Branković, S., Vodnik, V., Milosavljević, A. R., Piscopiello, E., Luyt, A. S.,& Đoković, V.. (2015). Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells. in Colloids and Surfaces B-Biointerfaces
Elsevier Science Bv, Amsterdam., 135, 742-750.
https://doi.org/10.1016/j.colsurfb.2015.08.050

Pajović JD, Dojčilović R, Božanić DK, Kascakova S, Refregiers M, Dimitrijević-Branković S, Vodnik V, Milosavljević AR, Piscopiello E, Luyt AS, Đoković V. Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells. in Colloids and Surfaces B-Biointerfaces. 2015;135:742-750.
doi:10.1016/j.colsurfb.2015.08.050 .

Pajović, Jelena D., Dojčilović, Radovan, Božanić, Dušan K., Kascakova, Slavka, Refregiers, Matthieu, Dimitrijević-Branković, Suzana, Vodnik, Vesna, Milosavljević, Aleksandar R., Piscopiello, Emanuela, Luyt, Adriaan S., Đoković, Vladimir, "Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells" in Colloids and Surfaces B-Biointerfaces, 135 (2015):742-750,
https://doi.org/10.1016/j.colsurfb.2015.08.050 . .

TY  - JOUR
AU  - Khatri, Vinay
AU  - Halasz, Katalin
AU  - Trandafilović, Lidija V.
AU  - Dimitrijević-Branković, Suzana
AU  - Mohanty, Paritosh
AU  - Đoković, Vladimir
AU  - Csoka, Levente
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2823
AB  - Cellulose fiber sheets impregnated with saccharide capped-ZnO nanoparticles were used as bioactive materials for antibody immobilization. First, ZnO nanoparticles were synthesized in the presence of glucose (monosaccharide), sucrose (disaccharide) as well as alginic acid and starch (polysaccharides). The pine cellulose fibers were then modified by the obtained saccharide capped nanoparticles and further incorporated into the sheets. The presence of ZnO significantly improved the immobilization of the antibodies on the surface of the sheets. After rewetting the alginic acid-ZnO modified sheets with saline solution, the retention of antibodies was about 95%. A high degree of the immobilization of biomolecules is an important feature for possible fabrications of bioactive- or biosensing-papers and we successfully tested the sheets on the detection of blood types using (A, B, and D blood antibodies). The ZnO nanopartides affected also the other properties of the sheets. The ZnO-modified fiber sheets showed higher values of tensile index (strength), smoothness and opacity, while the value of porosity was substantially lower than that of the unmodified sheet. The presence of ZnO nanoparticles provided also the antimicrobial activity to the sheets. They showed a strong activity against bacteria (Escherichia coli and Staphylococcus aureus) and strong resistance to the attack of cellulase producing fungus Gloeophyllum trabeum.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Polymers
T1  - ZnO-modified cellulose fiber sheets for antibody immobilization
EP  - 147
SP  - 139
VL  - 109
DO  - 10.1016/j.carbpol.2014.03.061
ER  - 

@article{
author = "Khatri, Vinay and Halasz, Katalin and Trandafilović, Lidija V. and Dimitrijević-Branković, Suzana and Mohanty, Paritosh and Đoković, Vladimir and Csoka, Levente",
year = "2014",
abstract = "Cellulose fiber sheets impregnated with saccharide capped-ZnO nanoparticles were used as bioactive materials for antibody immobilization. First, ZnO nanoparticles were synthesized in the presence of glucose (monosaccharide), sucrose (disaccharide) as well as alginic acid and starch (polysaccharides). The pine cellulose fibers were then modified by the obtained saccharide capped nanoparticles and further incorporated into the sheets. The presence of ZnO significantly improved the immobilization of the antibodies on the surface of the sheets. After rewetting the alginic acid-ZnO modified sheets with saline solution, the retention of antibodies was about 95%. A high degree of the immobilization of biomolecules is an important feature for possible fabrications of bioactive- or biosensing-papers and we successfully tested the sheets on the detection of blood types using (A, B, and D blood antibodies). The ZnO nanopartides affected also the other properties of the sheets. The ZnO-modified fiber sheets showed higher values of tensile index (strength), smoothness and opacity, while the value of porosity was substantially lower than that of the unmodified sheet. The presence of ZnO nanoparticles provided also the antimicrobial activity to the sheets. They showed a strong activity against bacteria (Escherichia coli and Staphylococcus aureus) and strong resistance to the attack of cellulase producing fungus Gloeophyllum trabeum.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "ZnO-modified cellulose fiber sheets for antibody immobilization",
pages = "147-139",
volume = "109",
doi = "10.1016/j.carbpol.2014.03.061"
}

Khatri, V., Halasz, K., Trandafilović, L. V., Dimitrijević-Branković, S., Mohanty, P., Đoković, V.,& Csoka, L.. (2014). ZnO-modified cellulose fiber sheets for antibody immobilization. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 109, 139-147.
https://doi.org/10.1016/j.carbpol.2014.03.061

Khatri V, Halasz K, Trandafilović LV, Dimitrijević-Branković S, Mohanty P, Đoković V, Csoka L. ZnO-modified cellulose fiber sheets for antibody immobilization. in Carbohydrate Polymers. 2014;109:139-147.
doi:10.1016/j.carbpol.2014.03.061 .

Khatri, Vinay, Halasz, Katalin, Trandafilović, Lidija V., Dimitrijević-Branković, Suzana, Mohanty, Paritosh, Đoković, Vladimir, Csoka, Levente, "ZnO-modified cellulose fiber sheets for antibody immobilization" in Carbohydrate Polymers, 109 (2014):139-147,
https://doi.org/10.1016/j.carbpol.2014.03.061 . .

TY  - JOUR
AU  - Trandafilović, Lidija V.
AU  - Krsmanović, Radenka
AU  - Dimitrijević-Branković, Suzana
AU  - Stoiljković, Milovan
AU  - Luyt, Adriaan S.
AU  - Đoković, Vladimir
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2663
AB  - A procedure for the preparation of ZnO nanocubes in an alginate biopolymer was introduced. The obtained nanocubes were used for the preparation of ZnO/Ag heterostructures. High resolution scanning electron microscopy showed that reduction of silver salts in the presence of nanocubes results in the formation of spherical silver nanoparticles at their edges and vertices. UV-vis and photoluminescence spectroscopy revealed that alginate-ZnO/Ag nanostructures exhibit different optical properties compared to the starting alginate-ZnO system. The surface plasmon resonance peak of the silver nanoparticles dominates the absorption spectra of the ZnO/Ag hybrid particles, while at the same time the Ag nanoparticles quench the ZnO emission. The photocatalytic activity of the ZnO/Ag heterostructure was faster than that of the pure ZnO and further improved with increasing the concentration of silver. Both the alginate-ZnO and alginate-ZnO/Ag nanocomposites showed strong antimicrobial activities against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria.
PB  - Elsevier Science Sa, Lausanne
T2  - Chemical Engineering Journal
T1  - ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties
EP  - 349
SP  - 341
VL  - 253
DO  - 10.1016/j.cej.2014.05.056
ER  - 

@article{
author = "Trandafilović, Lidija V. and Krsmanović, Radenka and Dimitrijević-Branković, Suzana and Stoiljković, Milovan and Luyt, Adriaan S. and Đoković, Vladimir",
year = "2014",
abstract = "A procedure for the preparation of ZnO nanocubes in an alginate biopolymer was introduced. The obtained nanocubes were used for the preparation of ZnO/Ag heterostructures. High resolution scanning electron microscopy showed that reduction of silver salts in the presence of nanocubes results in the formation of spherical silver nanoparticles at their edges and vertices. UV-vis and photoluminescence spectroscopy revealed that alginate-ZnO/Ag nanostructures exhibit different optical properties compared to the starting alginate-ZnO system. The surface plasmon resonance peak of the silver nanoparticles dominates the absorption spectra of the ZnO/Ag hybrid particles, while at the same time the Ag nanoparticles quench the ZnO emission. The photocatalytic activity of the ZnO/Ag heterostructure was faster than that of the pure ZnO and further improved with increasing the concentration of silver. Both the alginate-ZnO and alginate-ZnO/Ag nanocomposites showed strong antimicrobial activities against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Chemical Engineering Journal",
title = "ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties",
pages = "349-341",
volume = "253",
doi = "10.1016/j.cej.2014.05.056"
}

Trandafilović, L. V., Krsmanović, R., Dimitrijević-Branković, S., Stoiljković, M., Luyt, A. S.,& Đoković, V.. (2014). ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties. in Chemical Engineering Journal
Elsevier Science Sa, Lausanne., 253, 341-349.
https://doi.org/10.1016/j.cej.2014.05.056

Trandafilović LV, Krsmanović R, Dimitrijević-Branković S, Stoiljković M, Luyt AS, Đoković V. ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties. in Chemical Engineering Journal. 2014;253:341-349.
doi:10.1016/j.cej.2014.05.056 .

Trandafilović, Lidija V., Krsmanović, Radenka, Dimitrijević-Branković, Suzana, Stoiljković, Milovan, Luyt, Adriaan S., Đoković, Vladimir, "ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties" in Chemical Engineering Journal, 253 (2014):341-349,
https://doi.org/10.1016/j.cej.2014.05.056 . .

TY  - JOUR
AU  - Trandafilović, Lidija V.
AU  - Luyt, Adriaan S.
AU  - Bibić, Nataša M.
AU  - Dimitrijević-Branković, Suzana
AU  - Georges, Michael K.
AU  - Radhakrishnan, Thottackad
AU  - Đoković, Vladimir
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2177
AB  - Poly(2-(dimethylamino)ethyl methacrylate-co-acrylic acid) polyampholyte copolymers were synthesized by radical polymerization of the co-monomers in different molar ratios (2-1, 1-1 and 1-2). The water solutions of the obtained materials were used as stabilization agents for the synthesis of silver nanoparticles. XRD. FTIR and DMA methods were used to study the physical properties of the pure copolymers. It was found that the copolymer is a completely amorphous and inhomogeneous material. The FTIR spectrum was analysed by using literature data and corresponding numerical simulations. TEM analysis showed that the shape of the nanoparticles prepared by reduction of the silver salt in the presence of co-polymers strongly depends on the ratio of DMAEMA and AA co-monomer units. Besides spherical Ag-nanoparticles, reduction in the presence of the polymer with equal molar content of co-monomers also resulted in the formation of nano-plate particles (circular thin plates and thin triangular nanoprisms). The formation of the nano-plate particles was further promoted by heating the mentioned solution at 60 degrees C in air. UV-vis spectroscopy was used to study the change in the surface plasmon resonance behaviour during the growth of the nanoplates. The Ag-nanocomposite thin films of all three co-polymers showed fast antimicrobial activity against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens (more than 99% reduction after 2 h of exposure).
PB  - Elsevier Science Bv, Amsterdam
T2  - Colloids and Surfaces A-Physicochemical and Engineering Aspects
T1  - Formation of nano-plate silver particles in the presence of polyampholyte copolymer
EP  - 25
SP  - 17
VL  - 414
DO  - 10.1016/j.colsurfa.2012.08.010
ER  - 

@article{
author = "Trandafilović, Lidija V. and Luyt, Adriaan S. and Bibić, Nataša M. and Dimitrijević-Branković, Suzana and Georges, Michael K. and Radhakrishnan, Thottackad and Đoković, Vladimir",
year = "2012",
abstract = "Poly(2-(dimethylamino)ethyl methacrylate-co-acrylic acid) polyampholyte copolymers were synthesized by radical polymerization of the co-monomers in different molar ratios (2-1, 1-1 and 1-2). The water solutions of the obtained materials were used as stabilization agents for the synthesis of silver nanoparticles. XRD. FTIR and DMA methods were used to study the physical properties of the pure copolymers. It was found that the copolymer is a completely amorphous and inhomogeneous material. The FTIR spectrum was analysed by using literature data and corresponding numerical simulations. TEM analysis showed that the shape of the nanoparticles prepared by reduction of the silver salt in the presence of co-polymers strongly depends on the ratio of DMAEMA and AA co-monomer units. Besides spherical Ag-nanoparticles, reduction in the presence of the polymer with equal molar content of co-monomers also resulted in the formation of nano-plate particles (circular thin plates and thin triangular nanoprisms). The formation of the nano-plate particles was further promoted by heating the mentioned solution at 60 degrees C in air. UV-vis spectroscopy was used to study the change in the surface plasmon resonance behaviour during the growth of the nanoplates. The Ag-nanocomposite thin films of all three co-polymers showed fast antimicrobial activity against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens (more than 99% reduction after 2 h of exposure).",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Colloids and Surfaces A-Physicochemical and Engineering Aspects",
title = "Formation of nano-plate silver particles in the presence of polyampholyte copolymer",
pages = "25-17",
volume = "414",
doi = "10.1016/j.colsurfa.2012.08.010"
}

Trandafilović, L. V., Luyt, A. S., Bibić, N. M., Dimitrijević-Branković, S., Georges, M. K., Radhakrishnan, T.,& Đoković, V.. (2012). Formation of nano-plate silver particles in the presence of polyampholyte copolymer. in Colloids and Surfaces A-Physicochemical and Engineering Aspects
Elsevier Science Bv, Amsterdam., 414, 17-25.
https://doi.org/10.1016/j.colsurfa.2012.08.010

Trandafilović LV, Luyt AS, Bibić NM, Dimitrijević-Branković S, Georges MK, Radhakrishnan T, Đoković V. Formation of nano-plate silver particles in the presence of polyampholyte copolymer. in Colloids and Surfaces A-Physicochemical and Engineering Aspects. 2012;414:17-25.
doi:10.1016/j.colsurfa.2012.08.010 .

Trandafilović, Lidija V., Luyt, Adriaan S., Bibić, Nataša M., Dimitrijević-Branković, Suzana, Georges, Michael K., Radhakrishnan, Thottackad, Đoković, Vladimir, "Formation of nano-plate silver particles in the presence of polyampholyte copolymer" in Colloids and Surfaces A-Physicochemical and Engineering Aspects, 414 (2012):17-25,
https://doi.org/10.1016/j.colsurfa.2012.08.010 . .

TY  - JOUR
AU  - Csoka, Levente
AU  - Božanić, Dušan K.
AU  - Nagy, Veronika
AU  - Dimitrijević-Branković, Suzana
AU  - Luyt, Adriaan S.
AU  - Grozdits, George
AU  - Đoković, Vladimir
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2110
AB  - A silver nanoparticle colloid was prepared by a modified Tollens method using D-glucose as the reduction agent. The obtained nanoparticles were used for the modification of pine, linter and recycled cellulose fibers. Although the silver contents were relatively low (0.05-0.13 wt.%), the cellulose-sheets prepared from the modified fibers show improved mechanical and viscoelastic properties. The tensile index (strength) increased with up to 30% in comparison to the index of the sheets obtained from the untreated fibers. The influence of the nanoparticles on the viscoelastic properties of the cellulose sheets was investigated by dynamic mechanical analysis (DMA) in the temperature range from -120 to 20 degrees C and with a force frequency of 100Hz. A broad relaxation transition positioned at -80 degrees C was observed in the loss modulus spectrum of all the cellulose sheets, while the Ag-modified sheets exhibited higher storage moduli values in the whole temperature range. The antimicrobial activity tests show that the pine, silver and recycled cellulose fiber sheets with silver nanoparticles can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Polymers
T1  - Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles
EP  - 1146
IS  - 2
SP  - 1139
VL  - 90
DO  - 10.1016/j.carbpol.2012.06.065
ER  - 

@article{
author = "Csoka, Levente and Božanić, Dušan K. and Nagy, Veronika and Dimitrijević-Branković, Suzana and Luyt, Adriaan S. and Grozdits, George and Đoković, Vladimir",
year = "2012",
abstract = "A silver nanoparticle colloid was prepared by a modified Tollens method using D-glucose as the reduction agent. The obtained nanoparticles were used for the modification of pine, linter and recycled cellulose fibers. Although the silver contents were relatively low (0.05-0.13 wt.%), the cellulose-sheets prepared from the modified fibers show improved mechanical and viscoelastic properties. The tensile index (strength) increased with up to 30% in comparison to the index of the sheets obtained from the untreated fibers. The influence of the nanoparticles on the viscoelastic properties of the cellulose sheets was investigated by dynamic mechanical analysis (DMA) in the temperature range from -120 to 20 degrees C and with a force frequency of 100Hz. A broad relaxation transition positioned at -80 degrees C was observed in the loss modulus spectrum of all the cellulose sheets, while the Ag-modified sheets exhibited higher storage moduli values in the whole temperature range. The antimicrobial activity tests show that the pine, silver and recycled cellulose fiber sheets with silver nanoparticles can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles",
pages = "1146-1139",
number = "2",
volume = "90",
doi = "10.1016/j.carbpol.2012.06.065"
}

Csoka, L., Božanić, D. K., Nagy, V., Dimitrijević-Branković, S., Luyt, A. S., Grozdits, G.,& Đoković, V.. (2012). Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 90(2), 1139-1146.
https://doi.org/10.1016/j.carbpol.2012.06.065

Csoka L, Božanić DK, Nagy V, Dimitrijević-Branković S, Luyt AS, Grozdits G, Đoković V. Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles. in Carbohydrate Polymers. 2012;90(2):1139-1146.
doi:10.1016/j.carbpol.2012.06.065 .

Csoka, Levente, Božanić, Dušan K., Nagy, Veronika, Dimitrijević-Branković, Suzana, Luyt, Adriaan S., Grozdits, George, Đoković, Vladimir, "Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles" in Carbohydrate Polymers, 90, no. 2 (2012):1139-1146,
https://doi.org/10.1016/j.carbpol.2012.06.065 . .

TY  - JOUR
AU  - Trandafilović, Lidija V.
AU  - Božanić, Dušan K.
AU  - Dimitrijević-Branković, Suzana
AU  - Luyt, Adriaan S.
AU  - Đoković, Vladimir
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2228
AB  - Alginate was used as a controlled environment for the growth of ZnO nanoparticles. The formation of nanostructured particles was confirmed by a blue shift in the onset of the optical absorption with respect to bulk ZnO. From the XRD measurements it was found that the obtained ZnO nanoparticles have a hexagonal crystal structure. The emission spectrum of the nanocomposite is dominated by a strong band-to-band recombination, while the emission from the ZnO defect states depended on the preparation conditions. Besides showing the presence of Zn 2p, O is, Na 1s and C 1s core levels, the XPS analysis also showed that the O is spectra can be resolved into two lines that are attributed to the presence of OH groups on the surface of the particles and ZnO, respectively. Antimicrobial tests revealed that the ZnO-alginate nanocomposite exhibits a strong activity against the common pathogens Staphylococcus aureus and Escherichia coli.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Polymers
T1  - Fabrication and antibacterial properties of ZnO-alginate nanocomposites
EP  - 269
IS  - 1
SP  - 263
VL  - 88
DO  - 10.1016/j.carbpol.2011.12.005
ER  - 

@article{
author = "Trandafilović, Lidija V. and Božanić, Dušan K. and Dimitrijević-Branković, Suzana and Luyt, Adriaan S. and Đoković, Vladimir",
year = "2012",
abstract = "Alginate was used as a controlled environment for the growth of ZnO nanoparticles. The formation of nanostructured particles was confirmed by a blue shift in the onset of the optical absorption with respect to bulk ZnO. From the XRD measurements it was found that the obtained ZnO nanoparticles have a hexagonal crystal structure. The emission spectrum of the nanocomposite is dominated by a strong band-to-band recombination, while the emission from the ZnO defect states depended on the preparation conditions. Besides showing the presence of Zn 2p, O is, Na 1s and C 1s core levels, the XPS analysis also showed that the O is spectra can be resolved into two lines that are attributed to the presence of OH groups on the surface of the particles and ZnO, respectively. Antimicrobial tests revealed that the ZnO-alginate nanocomposite exhibits a strong activity against the common pathogens Staphylococcus aureus and Escherichia coli.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "Fabrication and antibacterial properties of ZnO-alginate nanocomposites",
pages = "269-263",
number = "1",
volume = "88",
doi = "10.1016/j.carbpol.2011.12.005"
}

Trandafilović, L. V., Božanić, D. K., Dimitrijević-Branković, S., Luyt, A. S.,& Đoković, V.. (2012). Fabrication and antibacterial properties of ZnO-alginate nanocomposites. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 88(1), 263-269.
https://doi.org/10.1016/j.carbpol.2011.12.005

Trandafilović LV, Božanić DK, Dimitrijević-Branković S, Luyt AS, Đoković V. Fabrication and antibacterial properties of ZnO-alginate nanocomposites. in Carbohydrate Polymers. 2012;88(1):263-269.
doi:10.1016/j.carbpol.2011.12.005 .

Trandafilović, Lidija V., Božanić, Dušan K., Dimitrijević-Branković, Suzana, Luyt, Adriaan S., Đoković, Vladimir, "Fabrication and antibacterial properties of ZnO-alginate nanocomposites" in Carbohydrate Polymers, 88, no. 1 (2012):263-269,
https://doi.org/10.1016/j.carbpol.2011.12.005 . .

TY  - CONF
AU  - Đoković, Vladimir
AU  - Božanić, Dušan K.
AU  - Vodnik, Vesna
AU  - Krsmanović, Radenka
AU  - Trandafilović, Lidija V.
AU  - Dimitrijević-Branković, Suzana
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1862
AB  - We present the results on the structure and the optical properties of noble metal (Ag, Au) and oxide (ZnO) nanoparticles synthesized by various methods in different polysaccharide matrices such as chitosan, glycogen, alginate and starch. The structure of the obtained nanoparticles was studied in detail with microscopic techniques (TEM, SEM), while the XPS spectroscopy was used to investigate the effects at the nanoparticle-biomolecule interfaces. The antimicrobial activity of the nanocomposite films with Ag nanoparticles was tested against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens. In addition, we will present the results on the structure and optical properties of the tryptophan amino acid functionalized silver nanoparticles dispersed in water soluble polymer matrices.
PB  - Spie-Int Soc Optical Engineering, Bellingham
C3  - Physical Chemistry of Interfaces and Nanomaterials X
T1  - Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers
VL  - 8098
DO  - 10.1117/12.899934
ER  - 

@conference{
author = "Đoković, Vladimir and Božanić, Dušan K. and Vodnik, Vesna and Krsmanović, Radenka and Trandafilović, Lidija V. and Dimitrijević-Branković, Suzana",
year = "2011",
abstract = "We present the results on the structure and the optical properties of noble metal (Ag, Au) and oxide (ZnO) nanoparticles synthesized by various methods in different polysaccharide matrices such as chitosan, glycogen, alginate and starch. The structure of the obtained nanoparticles was studied in detail with microscopic techniques (TEM, SEM), while the XPS spectroscopy was used to investigate the effects at the nanoparticle-biomolecule interfaces. The antimicrobial activity of the nanocomposite films with Ag nanoparticles was tested against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens. In addition, we will present the results on the structure and optical properties of the tryptophan amino acid functionalized silver nanoparticles dispersed in water soluble polymer matrices.",
publisher = "Spie-Int Soc Optical Engineering, Bellingham",
journal = "Physical Chemistry of Interfaces and Nanomaterials X",
title = "Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers",
volume = "8098",
doi = "10.1117/12.899934"
}

Đoković, V., Božanić, D. K., Vodnik, V., Krsmanović, R., Trandafilović, L. V.,& Dimitrijević-Branković, S.. (2011). Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers. in Physical Chemistry of Interfaces and Nanomaterials X
Spie-Int Soc Optical Engineering, Bellingham., 8098.
https://doi.org/10.1117/12.899934

Đoković V, Božanić DK, Vodnik V, Krsmanović R, Trandafilović LV, Dimitrijević-Branković S. Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers. in Physical Chemistry of Interfaces and Nanomaterials X. 2011;8098.
doi:10.1117/12.899934 .

Đoković, Vladimir, Božanić, Dušan K., Vodnik, Vesna, Krsmanović, Radenka, Trandafilović, Lidija V., Dimitrijević-Branković, Suzana, "Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers" in Physical Chemistry of Interfaces and Nanomaterials X, 8098 (2011),
https://doi.org/10.1117/12.899934 . .

TY  - JOUR
AU  - Pandis, Ch.
AU  - Logakis, E.
AU  - Kyritsis, A.
AU  - Pissis, P.
AU  - Vodnik, Vesna
AU  - Džunuzović, Enis
AU  - Nedeljković, Jovan
AU  - Đoković, Vladimir
AU  - Rodriguez Hernandez, J. C.
AU  - Gomez Ribelles, J. L.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1865
AB  - Dynamic mechanical-thermal analysis (DMTA), differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and, mainly, broadband dielectric relaxation spectroscopy (DRS) were employed to investigate in detail glass transition and polymer dynamics in silver/poly(methyl methacrylate) (Ag/PMMA) nanocomposites. The nanocomposites were prepared by radical polymerization of MMA in the presence of surface modified Ag nanoparticles with a mean diameter of 5.6 nm dispersed in chloroform. The fraction of Ag nanoparticles in the final materials was varied between 0 and 0.5 wt%, the latter corresponding to 0.055 vol%. The results show that the nanoparticles have practically no effect on the time scale of the secondary beta and gamma relaxations, whereas the magnitude of both increases slightly but systematically with increasing filler content. The segmental alpha relaxation, associated with the glass transition, becomes systematically faster and stronger in the nanocomposites. The glass transition temperature T(g) decreases with increasing filler content of the nanocomposites up to about 10 degrees C. in good correlation by the four techniques employed. Finally, the elastic modulus decreases slightly but systematically in the nanocomposites, both in the glassy and in the rubbery state. The results are explained in terms of plasticization of the PMMA matrix, due to constraints imposed to packing of the chains by the Ag nanoparticles, and, at the same time, of the absence of strong polymer-filler interactions, due to the surface modification of the Ag nanoparticles by oleylamine at the stage of preparation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites
EP  - 1525
IS  - 8
SP  - 1514
VL  - 47
DO  - 10.1016/j.eurpolymj.2011.06.001
ER  - 

@article{
author = "Pandis, Ch. and Logakis, E. and Kyritsis, A. and Pissis, P. and Vodnik, Vesna and Džunuzović, Enis and Nedeljković, Jovan and Đoković, Vladimir and Rodriguez Hernandez, J. C. and Gomez Ribelles, J. L.",
year = "2011",
abstract = "Dynamic mechanical-thermal analysis (DMTA), differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and, mainly, broadband dielectric relaxation spectroscopy (DRS) were employed to investigate in detail glass transition and polymer dynamics in silver/poly(methyl methacrylate) (Ag/PMMA) nanocomposites. The nanocomposites were prepared by radical polymerization of MMA in the presence of surface modified Ag nanoparticles with a mean diameter of 5.6 nm dispersed in chloroform. The fraction of Ag nanoparticles in the final materials was varied between 0 and 0.5 wt%, the latter corresponding to 0.055 vol%. The results show that the nanoparticles have practically no effect on the time scale of the secondary beta and gamma relaxations, whereas the magnitude of both increases slightly but systematically with increasing filler content. The segmental alpha relaxation, associated with the glass transition, becomes systematically faster and stronger in the nanocomposites. The glass transition temperature T(g) decreases with increasing filler content of the nanocomposites up to about 10 degrees C. in good correlation by the four techniques employed. Finally, the elastic modulus decreases slightly but systematically in the nanocomposites, both in the glassy and in the rubbery state. The results are explained in terms of plasticization of the PMMA matrix, due to constraints imposed to packing of the chains by the Ag nanoparticles, and, at the same time, of the absence of strong polymer-filler interactions, due to the surface modification of the Ag nanoparticles by oleylamine at the stage of preparation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites",
pages = "1525-1514",
number = "8",
volume = "47",
doi = "10.1016/j.eurpolymj.2011.06.001"
}

Pandis, Ch., Logakis, E., Kyritsis, A., Pissis, P., Vodnik, V., Džunuzović, E., Nedeljković, J., Đoković, V., Rodriguez Hernandez, J. C.,& Gomez Ribelles, J. L.. (2011). Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 47(8), 1514-1525.
https://doi.org/10.1016/j.eurpolymj.2011.06.001

Pandis C, Logakis E, Kyritsis A, Pissis P, Vodnik V, Džunuzović E, Nedeljković J, Đoković V, Rodriguez Hernandez JC, Gomez Ribelles JL. Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites. in European Polymer Journal. 2011;47(8):1514-1525.
doi:10.1016/j.eurpolymj.2011.06.001 .

Pandis, Ch., Logakis, E., Kyritsis, A., Pissis, P., Vodnik, Vesna, Džunuzović, Enis, Nedeljković, Jovan, Đoković, Vladimir, Rodriguez Hernandez, J. C., Gomez Ribelles, J. L., "Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites" in European Polymer Journal, 47, no. 8 (2011):1514-1525,
https://doi.org/10.1016/j.eurpolymj.2011.06.001 . .

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Đoković, Vladimir
AU  - Dimitrijević-Branković, Suzana
AU  - Krsmanović, Radenka
AU  - McPherson, Michael
AU  - Nair, P. Sreekumari
AU  - Georges, Michael K.
AU  - Radhakrishnan, Thottackad
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1857
AB  - A sago starch biopolymer with embedded silver nanoparticles has been studied as a material for the prevention of microbial growth. Approximately 8 nm in size, silver nanoparticles have been synthesized by reduction of the silver salt in aqueous solution in the presence of sago starch using sodium borohydride as a reducing agent. The obtained solutions were cast on glass plates to obtain thin supported silver-starch nanocomposite films. The morphology of the nanocomposites was investigated by scanning and transmission electron microscopy. UV-Vis absorption spectroscopy showed that during the film formation a part of the silver nanoparticles has been trapped in the water present in the sample, which enabled their partial oxidation into active Ag(+) species. The oxidation of the silver nanoparticles was confirmed by X-ray photoelectron spectroscopy. The antimicrobial activity tests have shown that the nanocomposite material can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans.
PB  - Vsp Bv, Leiden
T2  - Journal of Biomaterials Science-Polymer Edition
T1  - Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films
EP  - 2355
IS  - 17
SP  - 2343
VL  - 22
DO  - 10.1163/092050610X539532
ER  - 

@article{
author = "Božanić, Dušan K. and Đoković, Vladimir and Dimitrijević-Branković, Suzana and Krsmanović, Radenka and McPherson, Michael and Nair, P. Sreekumari and Georges, Michael K. and Radhakrishnan, Thottackad",
year = "2011",
abstract = "A sago starch biopolymer with embedded silver nanoparticles has been studied as a material for the prevention of microbial growth. Approximately 8 nm in size, silver nanoparticles have been synthesized by reduction of the silver salt in aqueous solution in the presence of sago starch using sodium borohydride as a reducing agent. The obtained solutions were cast on glass plates to obtain thin supported silver-starch nanocomposite films. The morphology of the nanocomposites was investigated by scanning and transmission electron microscopy. UV-Vis absorption spectroscopy showed that during the film formation a part of the silver nanoparticles has been trapped in the water present in the sample, which enabled their partial oxidation into active Ag(+) species. The oxidation of the silver nanoparticles was confirmed by X-ray photoelectron spectroscopy. The antimicrobial activity tests have shown that the nanocomposite material can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans.",
publisher = "Vsp Bv, Leiden",
journal = "Journal of Biomaterials Science-Polymer Edition",
title = "Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films",
pages = "2355-2343",
number = "17",
volume = "22",
doi = "10.1163/092050610X539532"
}

Božanić, D. K., Đoković, V., Dimitrijević-Branković, S., Krsmanović, R., McPherson, M., Nair, P. S., Georges, M. K.,& Radhakrishnan, T.. (2011). Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films. in Journal of Biomaterials Science-Polymer Edition
Vsp Bv, Leiden., 22(17), 2343-2355.
https://doi.org/10.1163/092050610X539532

Božanić DK, Đoković V, Dimitrijević-Branković S, Krsmanović R, McPherson M, Nair PS, Georges MK, Radhakrishnan T. Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films. in Journal of Biomaterials Science-Polymer Edition. 2011;22(17):2343-2355.
doi:10.1163/092050610X539532 .

Božanić, Dušan K., Đoković, Vladimir, Dimitrijević-Branković, Suzana, Krsmanović, Radenka, McPherson, Michael, Nair, P. Sreekumari, Georges, Michael K., Radhakrishnan, Thottackad, "Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films" in Journal of Biomaterials Science-Polymer Edition, 22, no. 17 (2011):2343-2355,
https://doi.org/10.1163/092050610X539532 . .

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Dimitrijević-Branković, Suzana
AU  - Bibić, Nataša M.
AU  - Luyt, Adriaan S.
AU  - Đoković, Vladimir
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1927
AB  - The glycogen biopolymer from the bovine liver has been used as stabilization agent for the growth of silver nanoparticles The samples with various contents of silver were prepared by two different procedures that include fast (using microwave radiation) and slow (conventional) heating of the reaction mixtures The TEM images of the two nanocomposites showed the presence of nanoparticles with average diameter of 9 7 and 10 4 nm respectively The results also revealed that the optical properties of the obtained nanocomposite samples strongly depend on the method of preparation The samples prepared using microwave radiation exhibited narrower surface plasmon resonance peaks while the silver nanoparticles induced quenching of the photoluminescence of glycogen in all of the tested samples Antimicrobial activity tests were carried out against Staphylococcus aureus Escherichia coli and Candida albicans pathogens and showed that the microbial growth was gradually reduced as the concentration of the silver increased Also after 2 h of exposure to the nanocomposites the number of cells was significantly reduced ( gt 99%) for all the strains tested
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Polymers
T1  - Silver nanoparticles encapsulated in glycogen biopolymer Morphology, optical and antimicrobial properties
EP  - 890
IS  - 2
SP  - 883
VL  - 83
DO  - 10.1016/j.carbpol.2010.08.070
ER  - 

@article{
author = "Božanić, Dušan K. and Dimitrijević-Branković, Suzana and Bibić, Nataša M. and Luyt, Adriaan S. and Đoković, Vladimir",
year = "2011",
abstract = "The glycogen biopolymer from the bovine liver has been used as stabilization agent for the growth of silver nanoparticles The samples with various contents of silver were prepared by two different procedures that include fast (using microwave radiation) and slow (conventional) heating of the reaction mixtures The TEM images of the two nanocomposites showed the presence of nanoparticles with average diameter of 9 7 and 10 4 nm respectively The results also revealed that the optical properties of the obtained nanocomposite samples strongly depend on the method of preparation The samples prepared using microwave radiation exhibited narrower surface plasmon resonance peaks while the silver nanoparticles induced quenching of the photoluminescence of glycogen in all of the tested samples Antimicrobial activity tests were carried out against Staphylococcus aureus Escherichia coli and Candida albicans pathogens and showed that the microbial growth was gradually reduced as the concentration of the silver increased Also after 2 h of exposure to the nanocomposites the number of cells was significantly reduced ( gt 99%) for all the strains tested",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "Silver nanoparticles encapsulated in glycogen biopolymer Morphology, optical and antimicrobial properties",
pages = "890-883",
number = "2",
volume = "83",
doi = "10.1016/j.carbpol.2010.08.070"
}

Božanić, D. K., Dimitrijević-Branković, S., Bibić, N. M., Luyt, A. S.,& Đoković, V.. (2011). Silver nanoparticles encapsulated in glycogen biopolymer Morphology, optical and antimicrobial properties. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 83(2), 883-890.
https://doi.org/10.1016/j.carbpol.2010.08.070

Božanić DK, Dimitrijević-Branković S, Bibić NM, Luyt AS, Đoković V. Silver nanoparticles encapsulated in glycogen biopolymer Morphology, optical and antimicrobial properties. in Carbohydrate Polymers. 2011;83(2):883-890.
doi:10.1016/j.carbpol.2010.08.070 .

Božanić, Dušan K., Dimitrijević-Branković, Suzana, Bibić, Nataša M., Luyt, Adriaan S., Đoković, Vladimir, "Silver nanoparticles encapsulated in glycogen biopolymer Morphology, optical and antimicrobial properties" in Carbohydrate Polymers, 83, no. 2 (2011):883-890,
https://doi.org/10.1016/j.carbpol.2010.08.070 . .