Resonant Raman spectroscopy of individual strained single-wall carbon nanotubes.
Resonance Raman spectra of individual strained ultralong single-wall carbon nanotubes (SWNTs) are studied. Torsional and uniaxial strains are introduced by atomic force microscopy manipulation. Torsional strain strongly affects the Raman spectra, inducing a large downshift in the E2 symmetry mode in the G+ band, but a slight upshift for the rest of the G modes and also an upshift in the radial breathing mode (RBM). Whereas uniaxial strain has no effect on the frequency of either the E2 symmetry mode in the G+ band or the RBM, it downshifts the rest of the G modes. The Raman intensity change reflects the effect of these strains on the SWNT electronic band structure.
Duan
Xiaojie
X
Centre for Nanoscale Science and Technology, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.
Son
Hyungbin
H
Gao
Bo
B
Zhang
Jin
J
Wu
Tianjiao
T
Samsonidze
Georgy G
GG
Dresselhaus
Mildred S
MS
Liu
Zhongfan
Z
Kong
Jing
J
D018625:Microscopy, Atomic Force; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013059:Spectrum Analysis, Raman
D037742:Nanotubes, Carbon