Effect of bending on single-walled carbon nanotubes

A Raman scattering study

Bei Wang, Awnish K. Gupta, Jun Huang, Harindra Vedala, Qingzhen Hao, Vincent Henry Crespi, Wonbong Choi, Peter C. Eklund

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We describe microRaman studies of serpentine single-walled carbon nanotubes grown on single-crystal quartz. Local Raman spectra were collected from bent and straight segments of the same nanotube to elucidate the effects of bending. Bending radii as large as 1-2 μm produce a measurable shift of the frequencies of the G, D, and 2D bands while the radial breathing mode remains nearly unaffected by bending. The frequency shift is approximately linear in the bending curvature 1/ Rb for radii of curvature Rb between 0.6 and 3.0μm. A very tightly bent bundle with Rb ∼50nm develops a very intricate G-band structure caused by new Raman modes that are activated by the broken cylindrical symmetry. These results show diverse behavior depending on the nanotube wrapping indices (n,m) but are comparable in magnitude to those predicted by tight-binding calculations of the Raman response in bent tubes.

Original languageEnglish (US)
Article number115422
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number11
DOIs
StatePublished - Mar 12 2010

Fingerprint

Single-walled carbon nanotubes (SWCN)
Nanotubes
Raman scattering
carbon nanotubes
Raman spectra
Quartz
Band structure
nanotubes
curvature
Single crystals
radii
breathing
frequency shift
bundles
quartz
tubes
shift
single crystals
symmetry

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wang, Bei ; Gupta, Awnish K. ; Huang, Jun ; Vedala, Harindra ; Hao, Qingzhen ; Crespi, Vincent Henry ; Choi, Wonbong ; Eklund, Peter C. / Effect of bending on single-walled carbon nanotubes : A Raman scattering study. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 81, No. 11.
@article{93e9cd3c73ec4c32bb2e05cf097921a8,
title = "Effect of bending on single-walled carbon nanotubes: A Raman scattering study",
abstract = "We describe microRaman studies of serpentine single-walled carbon nanotubes grown on single-crystal quartz. Local Raman spectra were collected from bent and straight segments of the same nanotube to elucidate the effects of bending. Bending radii as large as 1-2 μm produce a measurable shift of the frequencies of the G, D, and 2D bands while the radial breathing mode remains nearly unaffected by bending. The frequency shift is approximately linear in the bending curvature 1/ Rb for radii of curvature Rb between 0.6 and 3.0μm. A very tightly bent bundle with Rb ∼50nm develops a very intricate G-band structure caused by new Raman modes that are activated by the broken cylindrical symmetry. These results show diverse behavior depending on the nanotube wrapping indices (n,m) but are comparable in magnitude to those predicted by tight-binding calculations of the Raman response in bent tubes.",
author = "Bei Wang and Gupta, {Awnish K.} and Jun Huang and Harindra Vedala and Qingzhen Hao and Crespi, {Vincent Henry} and Wonbong Choi and Eklund, {Peter C.}",
year = "2010",
month = "3",
day = "12",
doi = "10.1103/PhysRevB.81.115422",
language = "English (US)",
volume = "81",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "11",

}

Effect of bending on single-walled carbon nanotubes : A Raman scattering study. / Wang, Bei; Gupta, Awnish K.; Huang, Jun; Vedala, Harindra; Hao, Qingzhen; Crespi, Vincent Henry; Choi, Wonbong; Eklund, Peter C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 11, 115422, 12.03.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of bending on single-walled carbon nanotubes

T2 - A Raman scattering study

AU - Wang, Bei

AU - Gupta, Awnish K.

AU - Huang, Jun

AU - Vedala, Harindra

AU - Hao, Qingzhen

AU - Crespi, Vincent Henry

AU - Choi, Wonbong

AU - Eklund, Peter C.

PY - 2010/3/12

Y1 - 2010/3/12

N2 - We describe microRaman studies of serpentine single-walled carbon nanotubes grown on single-crystal quartz. Local Raman spectra were collected from bent and straight segments of the same nanotube to elucidate the effects of bending. Bending radii as large as 1-2 μm produce a measurable shift of the frequencies of the G, D, and 2D bands while the radial breathing mode remains nearly unaffected by bending. The frequency shift is approximately linear in the bending curvature 1/ Rb for radii of curvature Rb between 0.6 and 3.0μm. A very tightly bent bundle with Rb ∼50nm develops a very intricate G-band structure caused by new Raman modes that are activated by the broken cylindrical symmetry. These results show diverse behavior depending on the nanotube wrapping indices (n,m) but are comparable in magnitude to those predicted by tight-binding calculations of the Raman response in bent tubes.

AB - We describe microRaman studies of serpentine single-walled carbon nanotubes grown on single-crystal quartz. Local Raman spectra were collected from bent and straight segments of the same nanotube to elucidate the effects of bending. Bending radii as large as 1-2 μm produce a measurable shift of the frequencies of the G, D, and 2D bands while the radial breathing mode remains nearly unaffected by bending. The frequency shift is approximately linear in the bending curvature 1/ Rb for radii of curvature Rb between 0.6 and 3.0μm. A very tightly bent bundle with Rb ∼50nm develops a very intricate G-band structure caused by new Raman modes that are activated by the broken cylindrical symmetry. These results show diverse behavior depending on the nanotube wrapping indices (n,m) but are comparable in magnitude to those predicted by tight-binding calculations of the Raman response in bent tubes.

UR - http://www.scopus.com/inward/record.url?scp=77955083817&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955083817&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.81.115422

DO - 10.1103/PhysRevB.81.115422

M3 - Article

VL - 81

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 11

M1 - 115422

ER -