TY  - JOUR
AU  - Danilović, Danijela
AU  - Trpkov, Đorđe
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Pajović, Jelena
AU  - Škipina, Blanka
AU  - Dudić, Duško
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12650
AB  - This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids
T2  - Contemporary Materials
T1  - Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium
T1  - Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију
VL  - 14
IS  - 1
SP  - 25
EP  - 29
DO  - 10.7251/COMEN2301025D
ER  - 

@article{
author = "Danilović, Danijela and Trpkov, Đorđe and Dojčilović, Radovan and Tošić, Dragana and Pajović, Jelena and Škipina, Blanka and Dudić, Duško",
year = "2023",
abstract = "This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids",
journal = "Contemporary Materials",
title = "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium, Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију",
volume = "14",
number = "1",
pages = "25-29",
doi = "10.7251/COMEN2301025D"
}

Danilović, D., Trpkov, Đ., Dojčilović, R., Tošić, D., Pajović, J., Škipina, B.,& Dudić, D.. (2023). Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials, 14(1), 25-29.
https://doi.org/10.7251/COMEN2301025D

Danilović D, Trpkov Đ, Dojčilović R, Tošić D, Pajović J, Škipina B, Dudić D. Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials. 2023;14(1):25-29.
doi:10.7251/COMEN2301025D .

Danilović, Danijela, Trpkov, Đorđe, Dojčilović, Radovan, Tošić, Dragana, Pajović, Jelena, Škipina, Blanka, Dudić, Duško, "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium" in Contemporary Materials, 14, no. 1 (2023):25-29,
https://doi.org/10.7251/COMEN2301025D . .

TY  - JOUR
AU  - Marinković, Filip S.
AU  - Škipina, Blanka
AU  - Vuković, Danijela
AU  - Langner, Ernst H. G.
AU  - Luyt, Adriaan S.
AU  - Dudić, Duško
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10602
AB  - Metal–organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)–microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz − 120 kHz and a temperature range 200–350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.
T2  - Journal of Macromolecular Science, Part B
T1  - AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite
SP  - 1
EP  - 9
DO  - 10.1080/00222348.2022.2159697
ER  - 

@article{
author = "Marinković, Filip S. and Škipina, Blanka and Vuković, Danijela and Langner, Ernst H. G. and Luyt, Adriaan S. and Dudić, Duško",
year = "2023",
abstract = "Metal–organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)–microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz − 120 kHz and a temperature range 200–350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.",
journal = "Journal of Macromolecular Science, Part B",
title = "AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite",
pages = "1-9",
doi = "10.1080/00222348.2022.2159697"
}

Marinković, F. S., Škipina, B., Vuković, D., Langner, E. H. G., Luyt, A. S.,& Dudić, D.. (2023). AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite. in Journal of Macromolecular Science, Part B, 1-9.
https://doi.org/10.1080/00222348.2022.2159697

Marinković FS, Škipina B, Vuković D, Langner EHG, Luyt AS, Dudić D. AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite. in Journal of Macromolecular Science, Part B. 2023;:1-9.
doi:10.1080/00222348.2022.2159697 .

Marinković, Filip S., Škipina, Blanka, Vuković, Danijela, Langner, Ernst H. G., Luyt, Adriaan S., Dudić, Duško, "AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite" in Journal of Macromolecular Science, Part B (2023):1-9,
https://doi.org/10.1080/00222348.2022.2159697 . .

TY  - JOUR
AU  - Vuković, Danijela
AU  - Škipina, Blanka
AU  - Maletić, Slavica
AU  - Cerović, Dragana D.
AU  - Duvenhage, Mart-Mari
AU  - Luyt, Adriaan Stephanus
AU  - Mirjanić, Dragoljub
AU  - Dudić, Duško
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9813
AB  - Polymer composite films of tris-(8-hydroxy-quinoline) aluminum (Alq3) and polymethyl methacrylate (PMMA) at two different concentrations were investigated. Dielectric properties of the samples were measured in broad frequency range and results show an increase in specific conductance and susceptance by adding Alq3 in PMMA. Changes in dielectric spectra caused by irradiation of the samples with LED lamps at different wavelengths were also recorded. The samples were examined by UV–Vis and Fourier transform infrared spectroscopy. The interaction between Alq3 and the polymer matrix was observed in the photoluminescence spectroscopy spectra. The doping of the PMMA with different concentrations of the Alq3 leads to the unique photodielectric properties of the resulting composite, and that is the main result of this study. Due to its interesting optical and photodielectric properties, PMMA/Alq3 film may find application in solar cells and optoelectronics.
T2  - Journal of Applied Polymer Science
T1  - The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites
VL  - 138
IS  - 39
SP  - 50992
DO  - 10.1002/app.50992
ER  - 

@article{
author = "Vuković, Danijela and Škipina, Blanka and Maletić, Slavica and Cerović, Dragana D. and Duvenhage, Mart-Mari and Luyt, Adriaan Stephanus and Mirjanić, Dragoljub and Dudić, Duško",
year = "2021",
abstract = "Polymer composite films of tris-(8-hydroxy-quinoline) aluminum (Alq3) and polymethyl methacrylate (PMMA) at two different concentrations were investigated. Dielectric properties of the samples were measured in broad frequency range and results show an increase in specific conductance and susceptance by adding Alq3 in PMMA. Changes in dielectric spectra caused by irradiation of the samples with LED lamps at different wavelengths were also recorded. The samples were examined by UV–Vis and Fourier transform infrared spectroscopy. The interaction between Alq3 and the polymer matrix was observed in the photoluminescence spectroscopy spectra. The doping of the PMMA with different concentrations of the Alq3 leads to the unique photodielectric properties of the resulting composite, and that is the main result of this study. Due to its interesting optical and photodielectric properties, PMMA/Alq3 film may find application in solar cells and optoelectronics.",
journal = "Journal of Applied Polymer Science",
title = "The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites",
volume = "138",
number = "39",
pages = "50992",
doi = "10.1002/app.50992"
}

Vuković, D., Škipina, B., Maletić, S., Cerović, D. D., Duvenhage, M., Luyt, A. S., Mirjanić, D.,& Dudić, D.. (2021). The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites. in Journal of Applied Polymer Science, 138(39), 50992.
https://doi.org/10.1002/app.50992

Vuković D, Škipina B, Maletić S, Cerović DD, Duvenhage M, Luyt AS, Mirjanić D, Dudić D. The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites. in Journal of Applied Polymer Science. 2021;138(39):50992.
doi:10.1002/app.50992 .

Vuković, Danijela, Škipina, Blanka, Maletić, Slavica, Cerović, Dragana D., Duvenhage, Mart-Mari, Luyt, Adriaan Stephanus, Mirjanić, Dragoljub, Dudić, Duško, "The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites" in Journal of Applied Polymer Science, 138, no. 39 (2021):50992,
https://doi.org/10.1002/app.50992 . .

TY  - JOUR
AU  - Škipina, Blanka
AU  - Petronijević, Ivan M.
AU  - Luyt, Adriaan S.
AU  - Dojčinović, Biljana P.
AU  - Duvenhage, Mart Mari
AU  - Swart, Hendrik C.
AU  - Suljovrujić, Edin H.
AU  - Dudić, Duško
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9722
AB  - This study provides a new insight into the relationships between absorption and adsorption processes that occur during the treatment of iPP in aqueous solutions of metal-chloride salts, as well as the impact of these processes on the electrical conductivity of this nonpolar polymer. The polypropylene films (0.5 mm) were exposed to three-day treatments in aqueous solutions of chlorine salts of some alkali and transition metals at temperatures of 22 °C and 80 °C. The treatments induced an increase in the electrical conductivity of iPP, up to 800%. DC conductivity is not directly proportional to the concentrations of metals in the treated films due to the complex relationships between diffusion and adsorption processes. The experiment was set up to simulate the real-world conditions and the study provides practical knowledge on the stability of the electrical conductivity of iPP under exposure to aqueous solutions. The influence of electric aging on the electrical conductivity of the treated films was also examined.
PB  - Elsevier
T2  - Surfaces and Interfaces
T1  - Ionic diffusion in iPP: DC electrical conductivity
VL  - 21
SP  - 100772
DO  - 10.1016/j.surfin.2020.100772
ER  - 

@article{
author = "Škipina, Blanka and Petronijević, Ivan M. and Luyt, Adriaan S. and Dojčinović, Biljana P. and Duvenhage, Mart Mari and Swart, Hendrik C. and Suljovrujić, Edin H. and Dudić, Duško",
year = "2020",
abstract = "This study provides a new insight into the relationships between absorption and adsorption processes that occur during the treatment of iPP in aqueous solutions of metal-chloride salts, as well as the impact of these processes on the electrical conductivity of this nonpolar polymer. The polypropylene films (0.5 mm) were exposed to three-day treatments in aqueous solutions of chlorine salts of some alkali and transition metals at temperatures of 22 °C and 80 °C. The treatments induced an increase in the electrical conductivity of iPP, up to 800%. DC conductivity is not directly proportional to the concentrations of metals in the treated films due to the complex relationships between diffusion and adsorption processes. The experiment was set up to simulate the real-world conditions and the study provides practical knowledge on the stability of the electrical conductivity of iPP under exposure to aqueous solutions. The influence of electric aging on the electrical conductivity of the treated films was also examined.",
publisher = "Elsevier",
journal = "Surfaces and Interfaces",
title = "Ionic diffusion in iPP: DC electrical conductivity",
volume = "21",
pages = "100772",
doi = "10.1016/j.surfin.2020.100772"
}

Škipina, B., Petronijević, I. M., Luyt, A. S., Dojčinović, B. P., Duvenhage, M. M., Swart, H. C., Suljovrujić, E. H.,& Dudić, D.. (2020). Ionic diffusion in iPP: DC electrical conductivity. in Surfaces and Interfaces
Elsevier., 21, 100772.
https://doi.org/10.1016/j.surfin.2020.100772

Škipina B, Petronijević IM, Luyt AS, Dojčinović BP, Duvenhage MM, Swart HC, Suljovrujić EH, Dudić D. Ionic diffusion in iPP: DC electrical conductivity. in Surfaces and Interfaces. 2020;21:100772.
doi:10.1016/j.surfin.2020.100772 .

Škipina, Blanka, Petronijević, Ivan M., Luyt, Adriaan S., Dojčinović, Biljana P., Duvenhage, Mart Mari, Swart, Hendrik C., Suljovrujić, Edin H., Dudić, Duško, "Ionic diffusion in iPP: DC electrical conductivity" in Surfaces and Interfaces, 21 (2020):100772,
https://doi.org/10.1016/j.surfin.2020.100772 . .

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 . .