Spectroscopic studies on Ag–polyvinyl alcohol nanocomposite films

Ag–Polyvinyl alcohol (Ag–PVA) films have been prepared, and the influence of annealing time upon the variation of cluster size has been analyzed using optical absorption, emission and Fourier-transform infrared (FTIR) spectra. Measurements of optical spectra show that the surface plasmon resonance l...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2005-07, Vol.364 (1), p.328-332
Main Author: Karthikeyan, B.
Format: Article
Language:English
Subjects:
Chemical synthesis
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Luminescence
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
Silver nanoparticles
Surface and interface electron states
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Summary:Ag–Polyvinyl alcohol (Ag–PVA) films have been prepared, and the influence of annealing time upon the variation of cluster size has been analyzed using optical absorption, emission and Fourier-transform infrared (FTIR) spectra. Measurements of optical spectra show that the surface plasmon resonance lies around 420 nm, and confirm the growth of Ag clusters. Measurements of FTIR spectra were carried out to identify the role of chemical interface damping which influenced the broadening of the absorption band. The emission peak was observed at 540 nm for clusters which were annealed for 1 min as well as 2 min.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2005.04.031