Open AccessOptical Properties of MS2 (M = Mo, W) Inorganic Fullerenelike and Nanotube Material Optical Absorption and Resonance Raman Measurements
Author(s) -
Gitti L. Frey,
Reshef Tenne,
Manyalibo J. Matthews,
M. S. Dresselhaus,
G. Dresselhaus
Publication year - 1998
Publication title -
journal of materials research/pratt's guide to venture capital sources
Language(s) - English
Resource type - Journals
eISSN - 0884-2914
pISSN - 0884-1616
DOI - 10.1557/jmr.1998.0335
Subject(s) - raman spectroscopy , materials science , resonance (particle physics) , exciton , absorption (acoustics) , phonon , analytical chemistry (journal) , absorption spectroscopy , nanotube , absorption edge , molecular physics , carbon nanotube , nanotechnology , atomic physics , optoelectronics , optics , condensed matter physics , band gap , chemistry , physics , chromatography , composite material
The optical properties of inorganic fullerene-like and nanotube MS 2 (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.