학술논문
Determination of the dispersive optical constants of the poly(vinyl chloride) transparent nanocomposite layers containing nanosilver intercalated graphene.
Document Type
Article
Source
Subject
*SYNTHESIS of Nanocomposite materials
*POLYVINYL chloride
*SILVER nanoparticles
*GRAPHENE
*OPTICAL properties
*THIN films
*BAND gaps
*REFLECTANCE spectroscopy
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Language
ISSN
0965-545X
Abstract
Transparent nanocomposite PVC thin films containing the silver nanoparticles intercalated graphene (Ag/G) were prepared by simple solution blending process, followed by drop casting and annealing route. The optical properties of the nanocomposite thin films with various weight percentages of the Ag/G nanoparticles were investigated. The fundamental optical constants of the thin films were determined using the UV-Vis reflectance and transmittance spectroscopy at the wavelength range of 300-800 nm. Optical band gap has been determined from the absorption coefficient values using Tauc's procedure. The optical band gap decreases from 3.79 eV for pure PVC film to 2.12 eV for the nanocomposite thin film with 5 wt% of the filler phase. The oscillator energy E, dispersion energy E and other parameters were determined by the Wemple-DiDomenico method. [ABSTRACT FROM AUTHOR]