Diameter dependence of the Raman D-band in isolated single-wall carbon nanotubes - art. no. 041401

Authors
Pimenta, MA Jorio, A Brown, SDM Souza, AG Dresselhaus, G Hafner, JH Lieber, CM Saito, R Dresselhaus, MS
Citation
Ma. Pimenta et al., Diameter dependence of the Raman D-band in isolated single-wall carbon nanotubes - art. no. 041401, PHYS REV B, 6404(4), 2001, pp. 1401
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6404
Issue
4
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010715)6404:4<1401:DDOTRD>2.0.ZU;2-J
Abstract
Raman D-band spectra are reported for several different SWNTs using two dif ferent laser energies (E-laser = 1.58 and 2.41 eV). At a fixed E-laser indi vidual isolated SWNTs exhibit different diameter-dependent D-band frequenci es omega (D) around an average value. For both semiconducting and metallic tubes, omega (D) decreases with decreasing nanotube diameter, though omega (D) for isolated metallic SWNTs is higher than for isolated semiconducting SWNTs. The average D-band frequency depends linearly on E-laser as previous ly observed for SWNT bundles, suggesting that the D-band in SWNTs is activa ted by defects or by the finite size of the SWNTs.