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Effect of PVA surrounding medium on ZnSe nanoparticles: Size, optical, and electrical properties
Faculty
Not Specified
Year:
2006
Type of Publication:
Article
Pages:
584-590
Authors:
Mahmoud, M. A, Badr, Y
DOI:
10.1016/j.saa.2005.12.015
Journal:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY PERGAMON-ELSEVIER SCIENCE LTD
Volume:
65
Research Area:
Spectroscopy
ISSN
ISI:000241785300014
Keywords :
ZnSeNPs, Raman spectra, IR spectra, PVA
Abstract:
Polyvinyl alcohol (PVA) matrix was used to confine the particle size of ZnSe nanocrystallites as well as the variation of zinc (Zn) to selenium (Se) ion ratio which showed a remarkable decrease on the particle size as this ratio increased. The particle size decrease was monitored from the UV-vis absorption measurement as well as photoluminescence which suffered a blue shift with particle size decrease. The particle size was characterized with the aid of X-ray diffraction (XRD). The Raman spectra showed that, as the particle size increases, the peak position of the line centers (LO) mode were found to be red shifted from 239 to 234 cm(-1), accompanied by an increase in the full-width at half-maximum (FWHM). The electrical measurements and FT-IR spectra (overtone and normal) band vibration were used to study the effect of ZnSe NPs size on the PVA matrix. (c) 2006 Elsevier B.V. All rights reserved.
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