Determining the Chiral Index of Semiconducting Carbon Nanotubes Using Photoconductivity Resonances

We utilize photoconductivity spectroscopy to identify the unique chiral structure of individual carbon nanotubes (CNTs). Peaks in photoconductivity are measured throughout the visible and near-IR wavelength ranges. Photoconductivity peaks associated with individual CNTs are referenced against existi...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 118; no. 19; pp. 9946 - 9950
Main Authors DeBorde, T, Aspitarte, L, Sharf, T, Kevek, J. W, Minot, E. D
Format Journal Article
LanguageEnglish
Published American Chemical Society 15.05.2014
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Summary:We utilize photoconductivity spectroscopy to identify the unique chiral structure of individual carbon nanotubes (CNTs). Peaks in photoconductivity are measured throughout the visible and near-IR wavelength ranges. Photoconductivity peaks associated with individual CNTs are referenced against existing Rayleigh scattering measurements to uniquely identify chiral indices. We find close agreement between our assigned exciton resonances and the previously published exciton resonances. The typical net energy mismatch is ≤20 meV. By enabling chiral identification of CNTs after the completion of device fabrication, the technique offers a facile method for investigating relationships between CNT structure and electronic/optoelectronic properties.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp502149c