Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 246, Issue 11-12, Pages 2786-2789Publisher
WILEY-BLACKWELL
DOI: 10.1002/pssb.200982275
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Funding
- European Union sixth Framework Program [NMP3-CT-2005-515840]
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The effect of the tube diameter and of the surface layer on the Raman spectra Of WS2 nanotubes is investigated. With decreasing diameter, a disorder-induced line in the A(1g) mode range, the D-A(1g) line, is selectively enhanced. This enhancement is attributed to an increasing structural disorder in smaller nanotubes. On the other hand, no significant effect on the D-A(1g)/A(1g), intensity ratio is observed for a Raman scan perpendicular to a 290 nm diameter tube. Therefore the enhancement of the disorder-induced line is an intrinsic property of WS2 nanostructures and not a surface layer effect. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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