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Photo-physical properties of of ZnS/PVA nanocrystals

J. P. BORAH1,* , K. C. SARMA1

Affiliation

  1. Department of Instrumentation and USIC , Gauhati University, Guwahati 781014, India

Abstract

Polyvinyl-alcohol (PVA) has been used as the matrix to synthesize ZnS /PVA composite films by means of the Chemical method. The as-obtained films were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Atomic force microscopy (AFM), Ultraviolet–visible (UV–VIS) absorption, and photoluminescence (PL) spectra. The results confirmed that the size of the as-synthesized ZnS nanoparticles depends on the amount of ZnCl2 salt. The photoluminescence and UV–VIS spectroscopy revealed that the ZnS/PVA films showed quantum confinement effect. The primary FTIR spectra of ZnS/PVA nanocomposite in different PVA:ZnCl2 have been discussed. The results indicate that the introduction of ZnS decreased the degree of crystallinity of PVA.

Keywords

II–VI semiconductors, Nanocrystalline materials, Optical properties.

Citation

J. P. BORAH, K. C. SARMA, Photo-physical properties of of ZnS/PVA nanocrystals, Optoelectronics and Advanced Materials - Rapid Communications, 3, 9, September 2009, pp.891-898 (2009).

Submitted at: July 9, 2009

Accepted at: Sept. 15, 2009