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Optical Properties of MS2 (M = Mo, W) Inorganic Fullerenelike and Nanotube Material Optical Absorption and Resonance Raman Measurements

Published online by Cambridge University Press:  31 January 2011

G. L. Frey ,
R. Tenne ,
M. J. Matthews ,
M. S. Dresselhaus  and
G. Dresselhaus
G. L. Frey
Affiliation:
Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
R. Tenne
Affiliation:
Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
M. J. Matthews
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
M. S. Dresselhaus
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
G. Dresselhaus
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Abstract

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The optical properties of inorganic fullerene-like and nanotube MS2 (M = Mo, W) material are studied through absorption and resonance Raman, and compared to those of the corresponding bulk material. The absorption measurements show that the semiconductivity is preserved. Nevertheless, the positions of the excitons are altered in comparison to the bulk. The Raman spectra of the nanoparticles show a close correspondence to that of the bulk. However, the first-order peaks are broadened and, under resonance conditions, new peaks are observed. The new peaks are assigned to disorder-induced zone edge phonons.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2412 - 2417
Copyright
Copyright © Materials Research Society 1998

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