Raman scattering as a probe of the electronic structure of single-wall carbon nanotubes under high pressure

S. V. Terekhov, E. D. Obraztsova, H. D. Hochheimer, P. Teredesai, Jeffery Yarger, A. V. Osadchy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Single-wall carbon nanotubes (SWNTs) under in-situ pressures of 0-0.5 GPa have been studied using Raman scattering in a diamond anvil cell (DAC). The pressure-induced changes in electronic structure of SWNT were related to changes observed in resonant Raman spectra. In particular, the radial breathing Raman modes show a strong pressure dependence. At ambient conditions the band at 191 cm-1, corresponding to SWNTs with a diameter of 1.29 nm was a dominant spectral feature, whereas at pressures above 0.3 GPa, the band at 211 cm-1, corresponding to nanotubes with a smaller diameter (1.16 nm), became dominant. The switching of resonance enhancement in selective diameter SWNTs is interpreted as a pressure-induced narrowing of the corresponding electronic gap. Upon decompression these effects are reversed. Our estimation of the band gap narrowing with pressure is in agreement with the direct measurement from optical absorption experiments on SWNT surfactant liquid suspension pressurized in a DAC.

Original languageEnglish (US)
Title of host publicationELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES
Subtitle of host publicationXIX International Winterschool/Euroconference on Electronic Properties of Novel Materials
Pages166-169
Number of pages4
DOIs
StatePublished - Sep 27 2005
EventELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials - Kirchberg, Tirol, Austria
Duration: Mar 12 2005Mar 19 2005

Publication series

NameAIP Conference Proceedings
Volume786
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials
CountryAustria
CityKirchberg, Tirol
Period3/12/053/19/05

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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