TY  - JOUR
AU  - Gulicovski, Jelena J.
AU  - Bracko, Ines
AU  - Milonjić, Slobodan K.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/191
AB  - Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Morphology and the isoelectric point of nanosized aqueous ceria sols
VL  - 148
IS  - 3
SP  - 868
EP  - 873
DO  - 10.1016/j.matchemphys.2014.08.063
ER  - 

@article{
author = "Gulicovski, Jelena J. and Bracko, Ines and Milonjić, Slobodan K.",
year = "2014",
abstract = "Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Morphology and the isoelectric point of nanosized aqueous ceria sols",
volume = "148",
number = "3",
pages = "868-873",
doi = "10.1016/j.matchemphys.2014.08.063"
}

Gulicovski, J. J., Bracko, I.,& Milonjić, S. K.. (2014). Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics, 148(3), 868-873.
https://doi.org/10.1016/j.matchemphys.2014.08.063

Gulicovski JJ, Bracko I, Milonjić SK. Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics. 2014;148(3):868-873.
doi:10.1016/j.matchemphys.2014.08.063 .

Gulicovski, Jelena J., Bracko, Ines, Milonjić, Slobodan K., "Morphology and the isoelectric point of nanosized aqueous ceria sols" in Materials Chemistry and Physics, 148, no. 3 (2014):868-873,
https://doi.org/10.1016/j.matchemphys.2014.08.063 . .

TY  - JOUR
AU  - Stevanović, Magdalena
AU  - Savanovic, Igor
AU  - Uskokovic, Vuk
AU  - Škapin, Srečo Davor
AU  - Bracko, Ines
AU  - Jovanović, Uroš D.
AU  - Uskoković, Dragan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4659
AB  - A simple and green chemical method has been developed to synthesize stable bare and capped silver nanoparticles based on the reduction of silver ions by glucose and capping by poly(alpha,gamma,l-glutamic acid) (PGA). The use of ammonia during synthesis was avoided. PGA has had a dual role in the synthesis and was used as a capping agent to make the silver nanoparticle more biocompatible and to protect the nanoparticles from agglomerating in the liquid medium. The synthesized PGA-capped silver nanoparticles in the size range 5-45 nm were stable over long periods of time, without signs of precipitation. Morphological examination has shown that the silver nanoparticles had a nearly spherical, multiply twinned structure. The effects of the reaction temperature and the reaction time during the synthesis were investigated too. The biocompatibility of the PGA-capped silver nanoparticles is discussed in terms of in vitro toxicity with human intestinal Caco-2 cells. The samples were characterized by UV-Visible spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and zeta potential measurements.
T2  - Colloid and Polymer Science
T1  - A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles
VL  - 290
IS  - 3
SP  - 221
EP  - 231
DO  - 10.1007/s00396-011-2540-7
ER  - 

@article{
author = "Stevanović, Magdalena and Savanovic, Igor and Uskokovic, Vuk and Škapin, Srečo Davor and Bracko, Ines and Jovanović, Uroš D. and Uskoković, Dragan",
year = "2012",
abstract = "A simple and green chemical method has been developed to synthesize stable bare and capped silver nanoparticles based on the reduction of silver ions by glucose and capping by poly(alpha,gamma,l-glutamic acid) (PGA). The use of ammonia during synthesis was avoided. PGA has had a dual role in the synthesis and was used as a capping agent to make the silver nanoparticle more biocompatible and to protect the nanoparticles from agglomerating in the liquid medium. The synthesized PGA-capped silver nanoparticles in the size range 5-45 nm were stable over long periods of time, without signs of precipitation. Morphological examination has shown that the silver nanoparticles had a nearly spherical, multiply twinned structure. The effects of the reaction temperature and the reaction time during the synthesis were investigated too. The biocompatibility of the PGA-capped silver nanoparticles is discussed in terms of in vitro toxicity with human intestinal Caco-2 cells. The samples were characterized by UV-Visible spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and zeta potential measurements.",
journal = "Colloid and Polymer Science",
title = "A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles",
volume = "290",
number = "3",
pages = "221-231",
doi = "10.1007/s00396-011-2540-7"
}

Stevanović, M., Savanovic, I., Uskokovic, V., Škapin, S. D., Bracko, I., Jovanović, U. D.,& Uskoković, D.. (2012). A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles. in Colloid and Polymer Science, 290(3), 221-231.
https://doi.org/10.1007/s00396-011-2540-7

Stevanović M, Savanovic I, Uskokovic V, Škapin SD, Bracko I, Jovanović UD, Uskoković D. A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles. in Colloid and Polymer Science. 2012;290(3):221-231.
doi:10.1007/s00396-011-2540-7 .

Stevanović, Magdalena, Savanovic, Igor, Uskokovic, Vuk, Škapin, Srečo Davor, Bracko, Ines, Jovanović, Uroš D., Uskoković, Dragan, "A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles" in Colloid and Polymer Science, 290, no. 3 (2012):221-231,
https://doi.org/10.1007/s00396-011-2540-7 . .