Phonon spectra in model carbon nanotubes

2000 ◽  
Vol 113 (5) ◽  
pp. 2007-2015 ◽  
Author(s):  
V. P. Sokhan ◽  
D. Nicholson ◽  
N. Quirke
Keyword(s):  
Carbon Nanotubes ◽  
Phonon Spectra

Discrete and continuum models for calculating the phonon spectra of carbon nanotubes

2002 ◽  
Vol 44 (9) ◽  
pp. 1802-1807 ◽  
Author(s):  
S. S. Savinskii ◽  
V. A. Petrovskii
Keyword(s):  
Carbon Nanotubes ◽  
Continuum Models ◽  
Phonon Spectra

Single-wall carbon nanotubes phonon spectra: Symmetry-based calculations

2003 ◽  
Vol 68 (4) ◽  
Author(s):  
E. Dobardžić ◽  
I. Milošević ◽  
B. Nikolić ◽  
T. Vuković ◽  
M. Damnjanović
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Phonon Spectra

Anisotropy in the Phonon Dispersion Relations of Graphite and Carbon Nanotubes Measured by Raman Spectroscopy

2002 ◽  
Vol 737 ◽  
Author(s):  
Georgii G. Samsonidze ◽  
Riichiro Saito ◽  
Ado Jorio ◽  
Antonio G. Souza Filho ◽  
Alexander Grüneis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Phonon Dispersion ◽  
Double Resonance ◽  
Single Wall Carbon Nanotubes ◽  
Resonance Theory ◽  
Phonon Spectra ◽  
Device Use ◽  
Low Dimensional

ABSTRACTThe possible semiconducting device use of single wall carbon nanotubes (SWNTs) requires a technique for the determination of the exact structure of the nanotubes assembled in the device configuration. Raman spectroscopy has been established as a precise and non-destructive tool for the characterization of graphitic nanostructures. Double resonance theory, which is used to explain the dispersive nature of the Raman bands, has attracted much attention for its potential use for the characterization of the electronic and phonon spectra of these nanostructures. Dispersive features in the Raman spectra of low dimensional graphitic materials, such as carbon nanotubes, can be used to measure directly the anisotropy, or the trigonal warping effect, in the phonon dispersion relations about the hexagonal corner of the Brillouin zone (BZ) of graphite.

Coherent Phonon in Single-Walled Carbon Nanotubes by Using a few-Cycle Pulse Laser

2011 ◽  
Vol 295-297 ◽  
pp. 1456-1459
Author(s):  
Zhao Gang Nie ◽  
Xin Zhong Li ◽  
Takayoshi Kobayashi
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Radial Breathing Mode ◽  
Coherent Phonon ◽  
Single Walled Carbon ◽  
Mo Catalyst ◽  
Phonon Spectra ◽  
Chiral Systems ◽  
Energy Dependent ◽  
Walled Carbon Nanotubes

We studied coherent phonon dynamics in Co-Mo-catalyst grown single-walled carbon nanotubes by using sub-5-fs visible pulses. Vibrational wave-packets corresponding to radial breathing mode for four chiral systems, (6,4), (6,5), (7,5) and (8,3), can be separately observed and achieved exact chirality assignments without ambiguity in coherent phonon spectra. Coherent phonon generation of radial breathing modes is in-depth studied by analyzing the probe energy dependent amplitude profiles, which indicates that the real and imaginary parts of the third-order susceptibility can both contribute to the modulation of the probed difference absorbance.

scholarly journals Origin of coherentG-band phonon spectra in single-wall carbon nanotubes

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
A. R. T. Nugraha ◽  
E. H. Hasdeo ◽  
G. D. Sanders ◽  
C. J. Stanton ◽  
R. Saito
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Phonon Spectra

Probing the electronic trigonal warping effect in individual single-wall carbon nanotubes using phonon spectra

2002 ◽  
Vol 354 (1-2) ◽  
pp. 62-68 ◽  
Author(s):  
A.G Souza Filho ◽  
A Jorio ◽  
Ge.G Samsonidze ◽  
G Dresselhaus ◽  
M.S Dresselhaus ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Phonon Spectra ◽  
Trigonal Warping

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

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