Vibrations of single-wall carbon nanotubes: lattice models and low-frequency dispersion

2004 ◽  
Vol 327 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Yu.N. Gartstein
Keyword(s):  
Carbon Nanotubes ◽  
Low Frequency ◽  
Lattice Models ◽  
Frequency Dispersion ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

scholarly journals Low-Frequency Current Fluctuations in Individual Semiconducting Single-Wall Carbon Nanotubes

Nano Letters ◽  
2006 ◽  
Vol 6 (5) ◽  
pp. 930-936 ◽  
Author(s):  
Yu-Ming Lin ◽  
Joerg Appenzeller ◽  
Joachim Knoch ◽  
Zhihong Chen ◽  
Phaedon Avouris
Keyword(s):  
Carbon Nanotubes ◽  
Low Frequency ◽  
Single Wall Carbon Nanotubes ◽  
Current Fluctuations ◽  
Single Wall Carbon ◽  
Frequency Current

scholarly journals Fine structure of the low-frequency Raman phonon bands of single-wall carbon nanotubes

2000 ◽  
Vol 316 (3-4) ◽  
pp. 217-221 ◽  
Author(s):  
M.N Iliev ◽  
A.P Litvinchuk ◽  
S Arepalli ◽  
P Nikolaev ◽  
C.D Scott
Keyword(s):  
Carbon Nanotubes ◽  
Fine Structure ◽  
Low Frequency ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Low-frequency Raman modes in Cs- and Rb-doped single wall carbon nanotubes

2001 ◽  
Vol 339 (5-6) ◽  
pp. 305-310 ◽  
Author(s):  
N. Bendiab ◽  
A. Righi ◽  
E. Anglaret ◽  
J.L. Sauvajol ◽  
L. Duclaux ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Low Frequency ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Raman Modes

Deformation Behavior of the Raman Radial Breathing Modes of Single-Wall Carbon Nanotubes in Composites

2003 ◽  
Vol 791 ◽  
Author(s):  
Marcel Lucas ◽  
Robert J. Young
Keyword(s):  
Carbon Nanotubes ◽  
Tight Binding ◽  
Low Frequency ◽  
Intensity Variation ◽  
Single Wall Carbon Nanotubes ◽  
Energy Separation ◽  
Resonance Theory ◽  
Electronic Density ◽  
Single Wall Carbon ◽  
Radial Breathing Modes

ABSTRACTRaman spectroscopy is a technique widely used to study the vibrational modes of carbon nanotubes. The low-frequency Radial Breathing Modes (RBMs) are frequently used to characterize carbon nanotube samples. We report a Raman spectroscopic study on the strain-induced intensity variations of the RBMs of Single-Wall Carbon Nanotubes (SWNTs) in epoxy/SWNT composites. The RBM intensities have been found to vary significantly over a range of strain between -0.3% and 0.7%. The trend (increase or decrease) as well as the magnitudes of the intensity variation depends on the nanotube diameter and its chirality. Using tight-binding calculations, we have shown that these intensity variations can be explained entirely by resonance theory. Electronic density of states calculations confirm that the energy separation between the Van Hove singularities shifts with strain. The nanotubes are thus moved closer or further away from resonance, causing the intensity variations. It is demonstrated that through the use of resonance theory, a tentative chirality can be assigned to each type of SWNT from knowledge of its RBM position and the effect of strain upon the RBM intensity, thus determining its entire structure.

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