TY  - JOUR
AU  - Lazić, Vesna M.
AU  - Mihajlovski, Katarina 
AU  - Lazić, Vesna M.
AU  - Illés, Erzsébet
AU  - Stoiljković, Milovan
AU  - Ahrenkiel, Scott Phillip
AU  - Nedeljković, Jovan
PY  - 2019
UR  - https://onlinelibrary.wiley.com/doi/abs/10.1002/slct.201900628
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8162
AB  - Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe 3 O 4 ) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30–50 nm in size silver particles surrounded by clusters of smaller (∼10 nm) Fe 3 O 4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.–%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 μg/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0 mg/mL of the nanocomposite, i. e., 40–800 μg/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
T2  - ChemistrySelect
T1  - Antimicrobial activity of silver nanoparticles supported by magnetite
VL  - 4
IS  - 14
SP  - 4018
EP  - 4024
DO  - 10.1002/slct.201900628
ER  - 

@article{
author = "Lazić, Vesna M. and Mihajlovski, Katarina  and Lazić, Vesna M. and Illés, Erzsébet and Stoiljković, Milovan and Ahrenkiel, Scott Phillip and Nedeljković, Jovan",
year = "2019",
abstract = "Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe 3 O 4 ) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30–50 nm in size silver particles surrounded by clusters of smaller (∼10 nm) Fe 3 O 4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.–%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 μg/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0 mg/mL of the nanocomposite, i. e., 40–800 μg/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
journal = "ChemistrySelect",
title = "Antimicrobial activity of silver nanoparticles supported by magnetite",
volume = "4",
number = "14",
pages = "4018-4024",
doi = "10.1002/slct.201900628"
}

Lazić, V. M., Mihajlovski, K., Lazić, V. M., Illés, E., Stoiljković, M., Ahrenkiel, S. P.,& Nedeljković, J.. (2019). Antimicrobial activity of silver nanoparticles supported by magnetite. in ChemistrySelect, 4(14), 4018-4024.
https://doi.org/10.1002/slct.201900628

Lazić VM, Mihajlovski K, Lazić VM, Illés E, Stoiljković M, Ahrenkiel SP, Nedeljković J. Antimicrobial activity of silver nanoparticles supported by magnetite. in ChemistrySelect. 2019;4(14):4018-4024.
doi:10.1002/slct.201900628 .

Lazić, Vesna M., Mihajlovski, Katarina , Lazić, Vesna M., Illés, Erzsébet, Stoiljković, Milovan, Ahrenkiel, Scott Phillip, Nedeljković, Jovan, "Antimicrobial activity of silver nanoparticles supported by magnetite" in ChemistrySelect, 4, no. 14 (2019):4018-4024,
https://doi.org/10.1002/slct.201900628 . .

TY  - JOUR
AU  - Kusigerski, Vladan
AU  - Illés, Erzsébet
AU  - Blanuša, Jovan
AU  - Gyergyek, Sašo
AU  - Bošković, Marko
AU  - Perović, Marija M.
AU  - Spasojević, Vojislav
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7983
AB  - Ferrofluids based on magnesium substituted magnetite nanoparticles MgxFe3−xO4 (x = 0.1; 0.2; 0.4) were synthesised by a chemical co-precipitation method. Their physical properties have been compared with those of the magnetite based ferrofluid obtained by the same synthesis route. Both XRD and TEM studies showed particle size decrease with the increased Mg content while DLS experiments pointed to the more prominent aggregation of Mg-containing nanoparticles. Magnetic properties investigation conducted on the powder (i.e. dried) specimens showed decrease of magnetization values with increased Mg content except for the lowest concentration of x = 0.1 where substantial saturation magnetization rise of about 40% was recorded at room temperature. Heating abilities of the studied ferrofluids under the applied AC fields (SAR values) also showed decreasing trend with the increased Mg content even for x = 0.1 sample despite its elevated magnetization value. This trend has been understood as a consequence of the changed intrinsic nanoparticle properties such as size and magnetic anisotropy, as well as contribution of a collective behaviour due to an increased nanoparticle aggregation in Mg-doped systems.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method
VL  - 475
SP  - 470
EP  - 478
DO  - 10.1016/j.jmmm.2018.11.127
ER  - 

@article{
author = "Kusigerski, Vladan and Illés, Erzsébet and Blanuša, Jovan and Gyergyek, Sašo and Bošković, Marko and Perović, Marija M. and Spasojević, Vojislav",
year = "2019",
abstract = "Ferrofluids based on magnesium substituted magnetite nanoparticles MgxFe3−xO4 (x = 0.1; 0.2; 0.4) were synthesised by a chemical co-precipitation method. Their physical properties have been compared with those of the magnetite based ferrofluid obtained by the same synthesis route. Both XRD and TEM studies showed particle size decrease with the increased Mg content while DLS experiments pointed to the more prominent aggregation of Mg-containing nanoparticles. Magnetic properties investigation conducted on the powder (i.e. dried) specimens showed decrease of magnetization values with increased Mg content except for the lowest concentration of x = 0.1 where substantial saturation magnetization rise of about 40% was recorded at room temperature. Heating abilities of the studied ferrofluids under the applied AC fields (SAR values) also showed decreasing trend with the increased Mg content even for x = 0.1 sample despite its elevated magnetization value. This trend has been understood as a consequence of the changed intrinsic nanoparticle properties such as size and magnetic anisotropy, as well as contribution of a collective behaviour due to an increased nanoparticle aggregation in Mg-doped systems.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method",
volume = "475",
pages = "470-478",
doi = "10.1016/j.jmmm.2018.11.127"
}

Kusigerski, V., Illés, E., Blanuša, J., Gyergyek, S., Bošković, M., Perović, M. M.,& Spasojević, V.. (2019). Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method. in Journal of Magnetism and Magnetic Materials, 475, 470-478.
https://doi.org/10.1016/j.jmmm.2018.11.127

Kusigerski V, Illés E, Blanuša J, Gyergyek S, Bošković M, Perović MM, Spasojević V. Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method. in Journal of Magnetism and Magnetic Materials. 2019;475:470-478.
doi:10.1016/j.jmmm.2018.11.127 .

Kusigerski, Vladan, Illés, Erzsébet, Blanuša, Jovan, Gyergyek, Sašo, Bošković, Marko, Perović, Marija M., Spasojević, Vojislav, "Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method" in Journal of Magnetism and Magnetic Materials, 475 (2019):470-478,
https://doi.org/10.1016/j.jmmm.2018.11.127 . .

TY  - CONF
AU  - Omelyanchik, Alexander
AU  - Knežević, Nikola
AU  - Rodionova, Valeria
AU  - Salvador, Maria
AU  - Peddis, Davide
AU  - Varvaro, Gaspare
AU  - Laureti, Sara
AU  - Mraković, Ana Đ.
AU  - Kusigerski, Vladan
AU  - Illes, Erzsebet
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8749
AB  - Investigating magnetic properties of nanoparticles dispersed in a fluid is catching an increasing attention for their wide range of applications; however, a careful magnetic characterization requires low temperatures and vacuum conditions which represent a critical issue for a correct sample handling. In this paper, several experimental protocols to investigate low temperature magnetic properties of magnetic nanoparticles dispersed in fluid are described. In particular, by investigating interparticle interaction by remanence techniques at low temperature, some insight about particle aggregation in fluids has been given. © 2018 IEEE.
PB  - IEEE
C3  - 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)
T1  - Experimental Protocols for Measuring Properties of Nanoparticles Dispersed in Fluids
SP  - 1
EP  - 5
DO  - 10.1109/NAP.2018.8915059
ER  - 

@conference{
author = "Omelyanchik, Alexander and Knežević, Nikola and Rodionova, Valeria and Salvador, Maria and Peddis, Davide and Varvaro, Gaspare and Laureti, Sara and Mraković, Ana Đ. and Kusigerski, Vladan and Illes, Erzsebet",
year = "2018",
abstract = "Investigating magnetic properties of nanoparticles dispersed in a fluid is catching an increasing attention for their wide range of applications; however, a careful magnetic characterization requires low temperatures and vacuum conditions which represent a critical issue for a correct sample handling. In this paper, several experimental protocols to investigate low temperature magnetic properties of magnetic nanoparticles dispersed in fluid are described. In particular, by investigating interparticle interaction by remanence techniques at low temperature, some insight about particle aggregation in fluids has been given. © 2018 IEEE.",
publisher = "IEEE",
journal = "2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)",
title = "Experimental Protocols for Measuring Properties of Nanoparticles Dispersed in Fluids",
pages = "1-5",
doi = "10.1109/NAP.2018.8915059"
}

Omelyanchik, A., Knežević, N., Rodionova, V., Salvador, M., Peddis, D., Varvaro, G., Laureti, S., Mraković, A. Đ., Kusigerski, V.,& Illes, E.. (2018). Experimental Protocols for Measuring Properties of Nanoparticles Dispersed in Fluids. in 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)
IEEE., 1-5.
https://doi.org/10.1109/NAP.2018.8915059

Omelyanchik A, Knežević N, Rodionova V, Salvador M, Peddis D, Varvaro G, Laureti S, Mraković AĐ, Kusigerski V, Illes E. Experimental Protocols for Measuring Properties of Nanoparticles Dispersed in Fluids. in 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP). 2018;:1-5.
doi:10.1109/NAP.2018.8915059 .

Omelyanchik, Alexander, Knežević, Nikola, Rodionova, Valeria, Salvador, Maria, Peddis, Davide, Varvaro, Gaspare, Laureti, Sara, Mraković, Ana Đ., Kusigerski, Vladan, Illes, Erzsebet, "Experimental Protocols for Measuring Properties of Nanoparticles Dispersed in Fluids" in 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP) (2018):1-5,
https://doi.org/10.1109/NAP.2018.8915059 . .

TY  - JOUR
AU  - Knežević, Nikola
AU  - Jimenez, Chiara Mauriello
AU  - Albino, Martin
AU  - Vukadinović, Aleksandar
AU  - Mraković, Ana Đ.
AU  - Illés, Erzsébet
AU  - Janaćković, Đorđe T.
AU  - Durand, Jean-Olivier
AU  - Sangregorio, Claudio
AU  - Peddis, Davide
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1775
AB  - Initial results en route toward construction of complex magnetic core-shell silica and organosilica nanotheranostics are presented. Magnetite nanoparticles are synthesized by three different methods and embedded within mesoporous silica and organosilica frameworks by different surfactant-templated procedures to produce three types of core-shell nanoparticles. Magnetite nanoparticles (15 nm in diameter) are embedded within mesoporous silica nanoparticles to produce cell-like material with predominantly one magnetite nuclei-resembling core per nanoparticle, with final particle diameter of ca. 150 nm, specific surface area of 573 m(2)/g and hexagonally structured tubular pores (2.6 nm predominant diameter), extended throughout the volume of nanoparticles. Two forms of spherical core-shell nanoparticles composed of magnetite cores embedded within mesoporous organosilica shells are also obtained by employing ethylene and ethane bridged organobisalkoxysilane precursors. The obtained nanomaterials are characterized by high surface area (978 and 820 m(2)/g), tubular pore morphology (2 and 2.8 nm predominant pore diameters), different diameters (386 and 100-200 nm), in case of ethylene- and ethane-composed organosilica shells, respectively. Different degree of agglomeration of magnetite nanoparticles was also observed in the obtained materials, and in the case of utilization of surfactant-pre-stabilized magnetite nanoparticles for the syntheses, their uniform and non-agglomerated distribution within the shells was noted.
T2  - MRS Advances
T1  - Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures
VL  - 2
IS  - 19-20
SP  - 1037
EP  - 1045
DO  - 10.1557/adv.2017.69
ER  - 

@article{
author = "Knežević, Nikola and Jimenez, Chiara Mauriello and Albino, Martin and Vukadinović, Aleksandar and Mraković, Ana Đ. and Illés, Erzsébet and Janaćković, Đorđe T. and Durand, Jean-Olivier and Sangregorio, Claudio and Peddis, Davide",
year = "2017",
abstract = "Initial results en route toward construction of complex magnetic core-shell silica and organosilica nanotheranostics are presented. Magnetite nanoparticles are synthesized by three different methods and embedded within mesoporous silica and organosilica frameworks by different surfactant-templated procedures to produce three types of core-shell nanoparticles. Magnetite nanoparticles (15 nm in diameter) are embedded within mesoporous silica nanoparticles to produce cell-like material with predominantly one magnetite nuclei-resembling core per nanoparticle, with final particle diameter of ca. 150 nm, specific surface area of 573 m(2)/g and hexagonally structured tubular pores (2.6 nm predominant diameter), extended throughout the volume of nanoparticles. Two forms of spherical core-shell nanoparticles composed of magnetite cores embedded within mesoporous organosilica shells are also obtained by employing ethylene and ethane bridged organobisalkoxysilane precursors. The obtained nanomaterials are characterized by high surface area (978 and 820 m(2)/g), tubular pore morphology (2 and 2.8 nm predominant pore diameters), different diameters (386 and 100-200 nm), in case of ethylene- and ethane-composed organosilica shells, respectively. Different degree of agglomeration of magnetite nanoparticles was also observed in the obtained materials, and in the case of utilization of surfactant-pre-stabilized magnetite nanoparticles for the syntheses, their uniform and non-agglomerated distribution within the shells was noted.",
journal = "MRS Advances",
title = "Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures",
volume = "2",
number = "19-20",
pages = "1037-1045",
doi = "10.1557/adv.2017.69"
}

Knežević, N., Jimenez, C. M., Albino, M., Vukadinović, A., Mraković, A. Đ., Illés, E., Janaćković, Đ. T., Durand, J., Sangregorio, C.,& Peddis, D.. (2017). Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures. in MRS Advances, 2(19-20), 1037-1045.
https://doi.org/10.1557/adv.2017.69

Knežević N, Jimenez CM, Albino M, Vukadinović A, Mraković AĐ, Illés E, Janaćković ĐT, Durand J, Sangregorio C, Peddis D. Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures. in MRS Advances. 2017;2(19-20):1037-1045.
doi:10.1557/adv.2017.69 .

Knežević, Nikola, Jimenez, Chiara Mauriello, Albino, Martin, Vukadinović, Aleksandar, Mraković, Ana Đ., Illés, Erzsébet, Janaćković, Đorđe T., Durand, Jean-Olivier, Sangregorio, Claudio, Peddis, Davide, "Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures" in MRS Advances, 2, no. 19-20 (2017):1037-1045,
https://doi.org/10.1557/adv.2017.69 . .