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American Institute of Physics, Applied Physics Letters, 9(99), p. 093104

DOI: 10.1063/1.3632076

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Isotope-induced elastic scattering of optical phonons in individual suspended single-walled carbon nanotubes

Journal article published in 2011 by Pei Zhao, Erik Einarsson, Rong Xiang ORCID, Yoichi Murakami, Shohei Chiashi, Junichiro Shiomi, Shigeo Maruyama
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Isotope-induced scattering of optical phonons in individual single-walled carbon nanotubes (SWNTs) was investigated by resonance Raman scattering measurements of more than 600 suspended, isotope-mixed SWNTs. The G(+) and G(-) features in the SWNT G-band exhibit broadening of up to 80% and 25%, respectively, indicating a reduced lifetime of the corresponding longitudinal and transverse optical (LO and TO) phonons. We propose that this reduced lifetime is due to a combination of enhanced phonon scattering by isotopic inhomogeneity and overbending in the LO phonon branch, both of which increase the scattering rate. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3632076]