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Influence of Vacancies on Optical Properties of Sic Nanocrystallites

Published online by Cambridge University Press:  15 February 2011

K.J. Plucinski ,
I.V. Kityk ,
A. Kassiba  and
C. Charpentier
K.J. Plucinski
Affiliation:
Military University of Technology, 2 Kaliski Str., 00-908 Warsaw, Poland, kpluc@wel.wat.waw.pl
I.V. Kityk
Affiliation:
Institute of Physics WSP, Al. Armii Krajowej 13/15, PL-42201, Czqstochowa, Poland
A. Kassiba
Affiliation:
Laboratoire de Physique de l'Etat Condense UPRES-A6087Universite du Maine-Avenue Olivier Messiaen72085 LeMans Cedex 9
C. Charpentier
Affiliation:
Laboratoire de Physique de l'Etat Condense UPRES-A6087Universite du Maine-Avenue Olivier Messiaen72085 LeMans Cedex 9
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Abstract

To investigate the origin of vacancies in SiC nanopowders, complex theoretical and experimental investigations of SiC nanopowders of different geometry sizes were carried out. Our theoretical approach included ab initio band energy calculations and molecular dynamics simulations with dynamic boundary conditions. Experimental methods included EPR spectra. The significant influence of nanocrystallite and grain sizes on the concentration and type of vacancies is demonstrated. On the other hand, our comparison of experimental data and theoretical simulations show that vacancies influence the optical properties of SiC nanocrystallites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 579: Symposium B – The Optical Properties of Materials , 1999 , 267
Copyright
Copyright © Materials Research Society 2000

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References

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