Investigation of polyvinylpyrrolidone/Ag nanocomposite films prepared by UV irradiation

Valentinas Baltrušaitis 1Judita Puišo 1,2Igoris Prosyčevas 1Asta Guobienė 1

1. Kaunas University of Technology, Institute of Physical Electronics, Savanoriu 271, Kaunas LT-3009, Lithuania
2. Kaunas University of Technology, Department of Physics, Studentu 50, Kaunas, Lithuania

Abstract

Silver nanoparticles layers were fabricated using spin coating and UV irradiation of polyvinylpyrrolidone/Ag nanoparticle composite thin films on glass. The spontaneous aggregation of Ag nanoparticles was accompanied with the absorption peak due to surface plasmon resonance (SPR) at 410 nm. Longer irradiation leads to partial coalescence of the nanoparticles with a corresponding shift of SPR towards longer wavelengths. The dependence of the shape, size, and absorbance spectra of these aggregates on UV irradiation time and silver salts concentration were investigated by UV-VIS spectroscopy, XRD and AFM.

 

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Presentation: Poster at E-MRS Fall Meeting 2008, Symposium E, by Judita Puišo
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-12 10:32
Revised:   2009-06-07 00:48