Strain-induced D band observed in carbon nanotubes

Chia Chi Chang; Chun Chung Chen; Wei Hsuan Hung; I. Kai Hsu; Marcos A. Pimenta; Stephen B. Cronin

doi:10.1007/s12274-012-0269-3

Strain-induced D band observed in carbon nanotubes

Chia Chi Chang, Chun Chung Chen, Wei Hsuan Hung, I. Kai Hsu, Marcos A. Pimenta, Stephen B. Cronin

材料科學與工程研究所

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

27 引文斯高帕斯（Scopus）

摘要

We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (I_D/I_G) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp² bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed.

原文	???core.languages.en_GB???
頁（從 - 到）	854-862
頁數	9
期刊	Nano Research
卷	5
發行號	12
DOIs	https://doi.org/10.1007/s12274-012-0269-3
出版狀態	已出版 - 12月 2012

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10.1007/s12274-012-0269-3

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abstract = "We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (ID/IG) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp2 bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed.",

keywords = "D band, Raman, SWCNTs, defects, strain",

author = "Chang, {Chia Chi} and Chen, {Chun Chung} and Hung, {Wei Hsuan} and Hsu, {I. Kai} and Pimenta, {Marcos A.} and Cronin, {Stephen B.}",

note = "Funding Information: This research was supported in part by Department of Energy (DOE) Award (No. DE-FG02-07ER46376) and Office of Naval Research (ONR) Award (No. N000141010511). The authors would like to thank Prof. Helio Chacham for helpful discussions.",

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AU - Chen, Chun Chung

AU - Hung, Wei Hsuan

AU - Hsu, I. Kai

AU - Pimenta, Marcos A.

AU - Cronin, Stephen B.

N1 - Funding Information: This research was supported in part by Department of Energy (DOE) Award (No. DE-FG02-07ER46376) and Office of Naval Research (ONR) Award (No. N000141010511). The authors would like to thank Prof. Helio Chacham for helpful discussions.

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N2 - We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (ID/IG) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp2 bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed.

AB - We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (ID/IG) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp2 bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed.

KW - D band

KW - Raman

KW - SWCNTs

KW - defects

KW - strain

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SP - 854

EP - 862

JO - Nano Research

JF - Nano Research

IS - 12

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Strain-induced D band observed in carbon nanotubes

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