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Infrared spectra of individual semiconducting single-walled carbon nanotubes: Testing the scaling of transition energies for large diameter nanotubes

By Matthew Sfeir, James Misewich, Sami Rosenblatt, Yang Wu, Christophe Voisin, Hugen Yan, Stéphane Berciaud, Tony Heinz, Bhupesh Chandra, Robert Caldwell, Yuyao Shan, James Hone and Larry Carr

Abstract

International audienceWe have measured the low-energy excitonic transitions of chiral assigned individual large-diameter semiconducting single-walled nanotubes using a high-resolution Fourier transform photoconductivity technique. When photoconductivity is complemented by Rayleigh scattering spectroscopy, as many as five optical transitions can be identified on the same individual nanotube over an energy range of 0.3-2.7 eV. We find that well-established energy scaling relations developed for nanotubes of smaller diameter are not consistent with the measured low-energy transitions in large (1.8-2.3 nm) diameter nanotubes

Topics: [ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]
Publisher: American Physical Society
Year: 2010
OAI identifier: oai:HAL:hal-00636913v1
Provided by: Hal-Diderot
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