TY  - JOUR
AU  - Hosakun, Worakan
AU  - Hosakun, Yanin
AU  - Dudić, Duško
AU  - Đoković, Vladimir
AU  - Csoka, Levente
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0142941818311358
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7864
AB  - Flexible and transparent substrate materials were fabricated by using bacterial cellulose (BC), silk fibroin protein (SF) and/or polyvinyl alcohol (PVA). The BC-SF and BC-SF-PVA films obtained were further modified by impregnation with silver nanocubes (AgNC). The influences of the silver nanocubes and white light illumination on the electric and viscoelastic properties of the films were investigated. Complex conductivity measurements showed that the films with PVA component are more sensitive to light exposure and there is an increase in conductance when the sample is illuminated. The films that contained silver nanocubes showed higher values of specific susceptance than their unmodified counterparts. DMA analyses revealed that the storage shear moduli of the films increase with addition of silver nanocubes. It was also found that the relaxation transition observed at elevated temperatures in the BC-SF-PVA-AgNC films is highly sensitive to the light exposure. Above the glass transition of PVA, both storage- and loss-shear moduli change dramatically if the sample is illuminated during the measurements with respect to the case when it was kept in the dark. © 2018
T2  - Polymer Testing
T1  - Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure
VL  - 71
SP  - 110
EP  - 114
DO  - 10.1016/j.polymertesting.2018.08.031
ER  - 

@article{
author = "Hosakun, Worakan and Hosakun, Yanin and Dudić, Duško and Đoković, Vladimir and Csoka, Levente",
year = "2018",
abstract = "Flexible and transparent substrate materials were fabricated by using bacterial cellulose (BC), silk fibroin protein (SF) and/or polyvinyl alcohol (PVA). The BC-SF and BC-SF-PVA films obtained were further modified by impregnation with silver nanocubes (AgNC). The influences of the silver nanocubes and white light illumination on the electric and viscoelastic properties of the films were investigated. Complex conductivity measurements showed that the films with PVA component are more sensitive to light exposure and there is an increase in conductance when the sample is illuminated. The films that contained silver nanocubes showed higher values of specific susceptance than their unmodified counterparts. DMA analyses revealed that the storage shear moduli of the films increase with addition of silver nanocubes. It was also found that the relaxation transition observed at elevated temperatures in the BC-SF-PVA-AgNC films is highly sensitive to the light exposure. Above the glass transition of PVA, both storage- and loss-shear moduli change dramatically if the sample is illuminated during the measurements with respect to the case when it was kept in the dark. © 2018",
journal = "Polymer Testing",
title = "Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure",
volume = "71",
pages = "110-114",
doi = "10.1016/j.polymertesting.2018.08.031"
}

Hosakun, W., Hosakun, Y., Dudić, D., Đoković, V.,& Csoka, L.. (2018). Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure. in Polymer Testing, 71, 110-114.
https://doi.org/10.1016/j.polymertesting.2018.08.031

Hosakun W, Hosakun Y, Dudić D, Đoković V, Csoka L. Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure. in Polymer Testing. 2018;71:110-114.
doi:10.1016/j.polymertesting.2018.08.031 .

Hosakun, Worakan, Hosakun, Yanin, Dudić, Duško, Đoković, Vladimir, Csoka, Levente, "Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure" in Polymer Testing, 71 (2018):110-114,
https://doi.org/10.1016/j.polymertesting.2018.08.031 . .

TY  - JOUR
AU  - Škipina, Blanka
AU  - Luyt, Adriaan S.
AU  - Csoka, Levente
AU  - Đoković, Vladimir
AU  - Dudić, Duško
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1922
AB  - The article describes the influence of humidity on the surface photodielectric properties of papers prepared from poly(ethyleneimine)-TiO2 hanoparticles-anthocyanin modified cellulose fibres. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red wine and red currant juice. The samples were conditioned to various relative humidities (from 9 to 100%) and illuminated with white visible light, lambda GT = 405 nm. The poly(ethyleneimine)-TiO2-anthocyanin modified samples showed similar photodielectric behaviour that can be clearly distinguished from the samples modified solely with poly(ethyleneimine)-TiO2. Generally, an increase in humidity enhances the conductivity of the samples and induces an increase in the amount of photo-induced charge. Also, at higher humidities (above 80%), the samples with anthocyanin showed significantly higher values of photo-induced charges with respect to anthocyanin free samples. The presented results suggest that the presence of water molecules promotes electron-injection processes from the anthocyanin to the semiconductor surface. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Dyes and Pigments
T1  - Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities
VL  - 149
SP  - 51
EP  - 58
DO  - 10.1016/j.dyepig.2017.08.064
ER  - 

@article{
author = "Škipina, Blanka and Luyt, Adriaan S. and Csoka, Levente and Đoković, Vladimir and Dudić, Duško",
year = "2018",
abstract = "The article describes the influence of humidity on the surface photodielectric properties of papers prepared from poly(ethyleneimine)-TiO2 hanoparticles-anthocyanin modified cellulose fibres. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red wine and red currant juice. The samples were conditioned to various relative humidities (from 9 to 100%) and illuminated with white visible light, lambda GT = 405 nm. The poly(ethyleneimine)-TiO2-anthocyanin modified samples showed similar photodielectric behaviour that can be clearly distinguished from the samples modified solely with poly(ethyleneimine)-TiO2. Generally, an increase in humidity enhances the conductivity of the samples and induces an increase in the amount of photo-induced charge. Also, at higher humidities (above 80%), the samples with anthocyanin showed significantly higher values of photo-induced charges with respect to anthocyanin free samples. The presented results suggest that the presence of water molecules promotes electron-injection processes from the anthocyanin to the semiconductor surface. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Dyes and Pigments",
title = "Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities",
volume = "149",
pages = "51-58",
doi = "10.1016/j.dyepig.2017.08.064"
}

Škipina, B., Luyt, A. S., Csoka, L., Đoković, V.,& Dudić, D.. (2018). Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities. in Dyes and Pigments, 149, 51-58.
https://doi.org/10.1016/j.dyepig.2017.08.064

Škipina B, Luyt AS, Csoka L, Đoković V, Dudić D. Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities. in Dyes and Pigments. 2018;149:51-58.
doi:10.1016/j.dyepig.2017.08.064 .

Škipina, Blanka, Luyt, Adriaan S., Csoka, Levente, Đoković, Vladimir, Dudić, Duško, "Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities" in Dyes and Pigments, 149 (2018):51-58,
https://doi.org/10.1016/j.dyepig.2017.08.064 . .

TY  - JOUR
AU  - Luyt, Adriaan S.
AU  - Škipina, Blanka
AU  - Csoka, Levente
AU  - Dudić, Duško
PY  - 2018
UR  - http://link.springer.com/10.1007/s00226-018-0994-1
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7629
AB  - Modified cellulose materials are finding increasing application in electronics, because of the need for more environmental-friendly electronic circuits. The papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres are completely environmentally friendly and can be applied to the construction of photocells or photo-/humidity sensors. To better understand the mechanisms of electrical conductivity of the said cellulose composites, the effect of humidity (RH = 9% -> 100%) on its dielectric properties is presented in this article. The possibility of trapping the negative and positive charges in the composite under different humidity conditions is also examined. A large number of studies suggest that proton conductivity, stimulated by humidity, is the dominant mechanism of electrical conductivity in cellulose-based materials. The results presented in this paper indicate that the electronic conductivity mechanisms also play a significant role in papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres.
T2  - Wood Science and Technology
T1  - Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres
VL  - 52
IS  - 3
SP  - 637
EP  - 651
DO  - 10.1007/s00226-018-0994-1
ER  - 

@article{
author = "Luyt, Adriaan S. and Škipina, Blanka and Csoka, Levente and Dudić, Duško",
year = "2018",
abstract = "Modified cellulose materials are finding increasing application in electronics, because of the need for more environmental-friendly electronic circuits. The papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres are completely environmentally friendly and can be applied to the construction of photocells or photo-/humidity sensors. To better understand the mechanisms of electrical conductivity of the said cellulose composites, the effect of humidity (RH = 9% -> 100%) on its dielectric properties is presented in this article. The possibility of trapping the negative and positive charges in the composite under different humidity conditions is also examined. A large number of studies suggest that proton conductivity, stimulated by humidity, is the dominant mechanism of electrical conductivity in cellulose-based materials. The results presented in this paper indicate that the electronic conductivity mechanisms also play a significant role in papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres.",
journal = "Wood Science and Technology",
title = "Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres",
volume = "52",
number = "3",
pages = "637-651",
doi = "10.1007/s00226-018-0994-1"
}

Luyt, A. S., Škipina, B., Csoka, L.,& Dudić, D.. (2018). Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres. in Wood Science and Technology, 52(3), 637-651.
https://doi.org/10.1007/s00226-018-0994-1

Luyt AS, Škipina B, Csoka L, Dudić D. Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres. in Wood Science and Technology. 2018;52(3):637-651.
doi:10.1007/s00226-018-0994-1 .

Luyt, Adriaan S., Škipina, Blanka, Csoka, Levente, Dudić, Duško, "Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres" in Wood Science and Technology, 52, no. 3 (2018):637-651,
https://doi.org/10.1007/s00226-018-0994-1 . .

TY  - JOUR
AU  - Hosakun, Yanin
AU  - Halasz, Katalin
AU  - Horvath, Miklos
AU  - Csoka, Levente
AU  - Đoković, Vladimir
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1651
AB  - Bacterial cellulose (BC) was used as an active material for fabrication of the membrane for CO2 capture. The BC-membrane is further modified with silk fibroin protein and ZnO nanoparticles in order to increase the number of sites that may bind CO2. The interaction of the CO2 with the membranes was investigated by means of ATR-FTIR spectroscopy. The argon purged membranes were used as the control samples. After pressurizing the membranes in CO2 at 3 bar, FTIR spectra were recorded and compared to the spectra of the controls. The interaction of the membrane materials with CO2 were studied by examining two regions of the spectra: 740-610 cm (1) (bending vibrations of CO2) and 2400- 2320 cm (1) (asymmetric stretching vibrations of CO2). The envelope of the bending mode peak in 740-610 cm (1) region is resolved into particular peaks and the appearance of the additional line at 654 cm (1) suggested that the absorption bands of CO2 alters because of the Lewis acid- base type of interaction with membranes. The changes in the region of asymmetric stretching vibrations of CO2 were even more pronounced after pressurization. The presence of the number of different sites (active groups) for the CO2 adsorption reflected in the appearance of several additional asymmetric stretching peaks. Also, due to the entrapment of the CO2 in the membrane, a typical C=O asymmetric stretching vibration line at similar to 2340 cm (1) is shifted towards lower frequencies. The analysis of the results suggested that there is a strong interaction of CO2 with BC membrane, which is additionally improved by its modification with silk fibroin and ZnO nanoparticles. From the results of CO2 permeation experiment, the basic BC membrane, silk fibroin- modified BC membrane and ZnO nanoparticles- modified BC membrane exhibited the CO2 permeability of 2.73, 2.69 and 2.66 Barrer, respectively. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes
VL  - 324
SP  - 83
EP  - 92
DO  - 10.1016/j.cej.2017.05.029
ER  - 

@article{
author = "Hosakun, Yanin and Halasz, Katalin and Horvath, Miklos and Csoka, Levente and Đoković, Vladimir",
year = "2017",
abstract = "Bacterial cellulose (BC) was used as an active material for fabrication of the membrane for CO2 capture. The BC-membrane is further modified with silk fibroin protein and ZnO nanoparticles in order to increase the number of sites that may bind CO2. The interaction of the CO2 with the membranes was investigated by means of ATR-FTIR spectroscopy. The argon purged membranes were used as the control samples. After pressurizing the membranes in CO2 at 3 bar, FTIR spectra were recorded and compared to the spectra of the controls. The interaction of the membrane materials with CO2 were studied by examining two regions of the spectra: 740-610 cm (1) (bending vibrations of CO2) and 2400- 2320 cm (1) (asymmetric stretching vibrations of CO2). The envelope of the bending mode peak in 740-610 cm (1) region is resolved into particular peaks and the appearance of the additional line at 654 cm (1) suggested that the absorption bands of CO2 alters because of the Lewis acid- base type of interaction with membranes. The changes in the region of asymmetric stretching vibrations of CO2 were even more pronounced after pressurization. The presence of the number of different sites (active groups) for the CO2 adsorption reflected in the appearance of several additional asymmetric stretching peaks. Also, due to the entrapment of the CO2 in the membrane, a typical C=O asymmetric stretching vibration line at similar to 2340 cm (1) is shifted towards lower frequencies. The analysis of the results suggested that there is a strong interaction of CO2 with BC membrane, which is additionally improved by its modification with silk fibroin and ZnO nanoparticles. From the results of CO2 permeation experiment, the basic BC membrane, silk fibroin- modified BC membrane and ZnO nanoparticles- modified BC membrane exhibited the CO2 permeability of 2.73, 2.69 and 2.66 Barrer, respectively. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes",
volume = "324",
pages = "83-92",
doi = "10.1016/j.cej.2017.05.029"
}

Hosakun, Y., Halasz, K., Horvath, M., Csoka, L.,& Đoković, V.. (2017). ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes. in Chemical Engineering Journal, 324, 83-92.
https://doi.org/10.1016/j.cej.2017.05.029

Hosakun Y, Halasz K, Horvath M, Csoka L, Đoković V. ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes. in Chemical Engineering Journal. 2017;324:83-92.
doi:10.1016/j.cej.2017.05.029 .

Hosakun, Yanin, Halasz, Katalin, Horvath, Miklos, Csoka, Levente, Đoković, Vladimir, "ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes" in Chemical Engineering Journal, 324 (2017):83-92,
https://doi.org/10.1016/j.cej.2017.05.029 . .

TY  - JOUR
AU  - Csoka, Levente
AU  - Dudić, Duško
AU  - Petronijević, Ivan M.
AU  - Rozsa, C.
AU  - Halasz, K.
AU  - Đoković, Vladimir
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/439
AB  - Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.
T2  - Cellulose
T1  - Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers
VL  - 22
IS  - 1
SP  - 779
EP  - 788
DO  - 10.1007/s10570-014-0537-3
ER  - 

@article{
author = "Csoka, Levente and Dudić, Duško and Petronijević, Ivan M. and Rozsa, C. and Halasz, K. and Đoković, Vladimir",
year = "2015",
abstract = "Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.",
journal = "Cellulose",
title = "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers",
volume = "22",
number = "1",
pages = "779-788",
doi = "10.1007/s10570-014-0537-3"
}

Csoka, L., Dudić, D., Petronijević, I. M., Rozsa, C., Halasz, K.,& Đoković, V.. (2015). Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose, 22(1), 779-788.
https://doi.org/10.1007/s10570-014-0537-3

Csoka L, Dudić D, Petronijević IM, Rozsa C, Halasz K, Đoković V. Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose. 2015;22(1):779-788.
doi:10.1007/s10570-014-0537-3 .

Csoka, Levente, Dudić, Duško, Petronijević, Ivan M., Rozsa, C., Halasz, K., Đoković, Vladimir, "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers" in Cellulose, 22, no. 1 (2015):779-788,
https://doi.org/10.1007/s10570-014-0537-3 . .

TY  - JOUR
AU  - Khatri, Vinay
AU  - Halasz, Katalin
AU  - Trandafilović, Lidija V.
AU  - Dimitrijević-Branković, Suzana I.
AU  - Mohanty, Paritosh
AU  - Đoković, Vladimir
AU  - Csoka, Levente
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6019
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. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Carbohydrate Polymers
T1  - ZnO-modified cellulose fiber sheets for antibody immobilization
VL  - 109
SP  - 139
EP  - 147
DO  - 10.1016/j.carbpol.2014.03.061
ER  - 

@article{
author = "Khatri, Vinay and Halasz, Katalin and Trandafilović, Lidija V. and Dimitrijević-Branković, Suzana I. 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. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Carbohydrate Polymers",
title = "ZnO-modified cellulose fiber sheets for antibody immobilization",
volume = "109",
pages = "139-147",
doi = "10.1016/j.carbpol.2014.03.061"
}

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

Khatri V, Halasz K, Trandafilović LV, Dimitrijević-Branković SI, 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 I., 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  - Csoka, Levente
AU  - Božanić, Dušan K.
AU  - Nagy, Veronika
AU  - Dimitrijević-Branković, Suzana I.
AU  - Luyt, Adriaan S.
AU  - Grozdits, George
AU  - Đoković, Vladimir
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4994
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. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Carbohydrate Polymers
T1  - Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles
VL  - 90
IS  - 2
SP  - 1139
EP  - 1146
DO  - 10.1016/j.carbpol.2012.06.065
ER  - 

@article{
author = "Csoka, Levente and Božanić, Dušan K. and Nagy, Veronika and Dimitrijević-Branković, Suzana I. 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. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Carbohydrate Polymers",
title = "Viscoelastic properties and antimicrobial activity of cellulose fiber sheets impregnated with Ag nanoparticles",
volume = "90",
number = "2",
pages = "1139-1146",
doi = "10.1016/j.carbpol.2012.06.065"
}

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

Csoka L, Božanić DK, Nagy V, Dimitrijević-Branković SI, 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 I., 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 . .