Show simple item record

dc.creatorJovanović, Željka
dc.creatorRadosavljević, Aleksandra
dc.creatorŠiljegović, Milorad
dc.creatorBibić, Nataša M.
dc.creatorMiskovic-Stankovic, Vesna
dc.creatorKačarević-Popović, Zorica M.
dc.description.abstractSilver nanoparticles (AgNPs) were synthesized in situ by gamma-irradiation using poly(N-vinyl-2-pyrrolidone) (PVP) as a capping agent. The concentration, molecular weight and the structure (crosslinked and interpenetrated network) of PVP were varied, in order to determine the influence of the capping agent in the radiolytic synthesis of the Ag/PVP nanosystems. Transmission electron microscopy (TEM) showed that AgNPs obtained from the solutions containing higher PVP concentration and higher molecular weight were spherical in shape, with narrow size distribution and a diameter of similar to 6 nm, while slightly larger rod-shaped silver agglomerates, with bimodal nanoparticle size distribution and diameters of similar to 10 nm and similar to 20 nm were obtained from the solutions containing lower PVP concentration and lower molecular weight. Strong plasmon coupling and extending of plasmon resonance was observed by UV-vis spectroscopy, as a result of formation of nanorod-like agglomerates. Crosslinked and interpenetrated network did not affect the structure of synthesized AgNPs. Ag/PVP nanocomposite, in the form of thin film, was obtained by solvent evaporation from Ag/PVP colloid solution with 10 wt% of PVP, and characterized by FTIR spectroscopy. The interactions in Ag/PVP nanocomposite are shown to be the result of the coordination bonding between AgNPs and nitrogen from pyrrolidone ring of PVP. The optical properties of investigated Ag/PVP nanosystems, as measured by the values of optical band gap, E-g, are mainly the consequence of the interparticle distance as a result of the concentration and the structure of surrounding PVP macromolecules. (C) 2012 Elsevier Ltd. All rights reserved.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45005/RS//
dc.relationInternational Atomic Energy Agency Vienna [CRP: F23028, 15384]
dc.sourceRadiation Physics and Chemistryen
dc.subjectSilver nanoparticlesen
dc.subjectOptical propertiesen
dc.titleStructural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiationen
dcterms.abstractБибиц, Натаса; Мисковиц-Станковиц, Весна; Шиљеговић Милорад; Радосављевић Aлександра; Јовановиц, Зељка; Качаревић-Поповић Зорица М;

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record