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Author Tripathi, J. ♦ Bisen, R. ♦ Choudhary, A. ♦ Tripathi, S. ♦ Sharma, A. ♦ Shripathi, T.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ ABSORPTION ♦ CONCENTRATION RATIO ♦ COUMARIN ♦ CRYSTALS ♦ DOPED MATERIALS ♦ FILMS ♦ FOURIER TRANSFORMATION ♦ INFRARED SPECTRA ♦ MODIFICATIONS ♦ NANOCOMPOSITES ♦ NANOSTRUCTURES ♦ OPTICAL PROPERTIES ♦ PVA ♦ X-RAY DIFFRACTION
Abstract The observations of combination of Poly (vinyl) alcohol and Coumarin properties in nanocmposite films are reported. The X-ray diffraction measurements reveal nanocrystalline nature of PVA film, which remains nanocrystalline after doping Coumarin but along with PVA peaks, additional peak due to dopant crystallinity is seen. The absorption edge shows a double edge feature, where distinct bandgaps for PVA host and dopant Coumarin are obtained. However at a higher doping wt % of 1 and 2, the absorption is mainly dominated by Coumarin and single absorption edge is observed giving a bandgap equal to that of bulk Coumarin (3.3 eV). The composite formation affects the bonding of host drastically and is seen through the bond modification in FTIR spectra. The results suggest that doping below 2 wt% is advantageous as combination of PVA and Coumarin properties are obtained but at 2 wt %, the properties are dominated by mainly Coumarin and the signature of PVA from optical properties is completely lost.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-23
Publisher Place United States
Volume Number 1731
Issue Number 1


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