In situ Raman Investigations of Single-Wall Carbon Nanotubes Pressurized in Diamond Anvil Cell

2001 ◽  
pp. 473-482
Author(s):  
E.D. Obraztsova
Keyword(s):  
Carbon Nanotubes ◽  
Diamond Anvil Cell ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
In Situ Raman ◽  
Diamond Anvil

Ion transport and electrochemical tuning of Fermi level in single-wall carbon nanotubes: In situ Raman scattering

2007 ◽  
Vol 22 (3) ◽  
pp. 603-614 ◽  
Author(s):  
S. Gupta
Keyword(s):  
Carbon Nanotubes ◽  
Raman Scattering ◽  
Fermi Level ◽  
Bond Length ◽  
Single Wall Carbon Nanotubes ◽  
Raman Intensity ◽  
Overlap Integral ◽  
Single Wall Carbon ◽  
In Situ Raman

The in situ Raman spectroscopy technique was used to investigate the ion transport and to determine the concomitant electrochemical tuning of Fermi level in single-wall carbon nanotubes. The variation of structural bonding in a single-wall carbon nanotube bundle dipped in aqueous alkaline earth halide electrolyte such as CaCl2 with electrochemical biasing was monitored. This is because Raman scattering can detect changes in C–C bond length through radial breathing mode (RBM) at ∼184 cm−1, which varies inversely with the nanotube diameter and the G band at ∼1590 cm−1, varying with the axial bond length. Consistent reversible and substantial variation in Raman intensity of both modes was induced by electrode potential point at the fine and continuous tuning (alternatively, emptying/depleting or filling) of the specific bonding and anti-bonding molecular states. Qualitatively, the results were explained in terms of changes in the energy gap occurring between the one-dimensional van Hove singularities present in the electron density of states, possibly arising due to the alterations in the overlap integral of π bonds between the p orbitals of the adjacent carbon atoms. We estimated the extent of variation of the absolute potential of the Fermi level and overlap integral (γ0) between the nearest-neighbor carbon atoms by modeling the electrochemical potential dependence of Raman intensity. Observations also suggested that the work function of the tube becomes larger for the metallic nanotubes in contrast to the simultaneously present semiconducting nanotubes.

Defects in Individual Semiconducting Single Wall Carbon Nanotubes: Raman Spectroscopic and in Situ Raman Spectroelectrochemical Study

Nano Letters ◽  
2010 ◽  
Vol 10 (11) ◽  
pp. 4619-4626 ◽  
Author(s):  
Martin Kalbac ◽  
Ya-Ping Hsieh ◽  
Hootan Farhat ◽  
Ladislav Kavan ◽  
Mario Hofmann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Raman Spectroscopic ◽  
In Situ Raman

scholarly journals In situ Raman scattering studies of alkali-doped single wall carbon nanotubes

2001 ◽  
Vol 333 (1-2) ◽  
pp. 16-22 ◽  
Author(s):  
A. Claye ◽  
S. Rahman ◽  
J.E. Fischer ◽  
A. Sirenko ◽  
G.U. Sumanasekera ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Scattering ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
In Situ Raman

In situ Raman studies on lithiated single-wall carbon nanotubes in liquid ammonia

2005 ◽  
Vol 410 (4-6) ◽  
pp. 467-470 ◽  
Author(s):  
Zhenning Gu ◽  
Feng Liang ◽  
Zheyi Chen ◽  
Anil Sadana ◽  
Carter Kittrell ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Ammonia ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
In Situ Raman

Laser-synthesis of single-wall carbon nanotubes with time-resolved in situ diagnostics

2001 ◽  
Author(s):  
David B. Geohegan ◽  
Alex A. Puretzky ◽  
Henrik Schittenhelm ◽  
Xudong Fan ◽  
Phillip F. Britt ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Time Resolved ◽  
Laser Synthesis ◽  
Single Wall Carbon ◽  
In Situ Diagnostics

In Situ Atomic Force Microscopy Tip-Induced Deformations and Raman Spectroscopy Characterization of Single-Wall Carbon Nanotubes

Nano Letters ◽  
2012 ◽  
Vol 12 (8) ◽  
pp. 4110-4116 ◽  
Author(s):  
P. T. Araujo ◽  
N. M. Barbosa Neto ◽  
H. Chacham ◽  
S. S. Carara ◽  
J. S. Soares ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Atomic Force Microscopy ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Force Microscopy ◽  
Atomic Force

In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes

2014 ◽  
Vol 5 (8) ◽  
pp. 1427-1432 ◽  
Author(s):  
Lili Zhang ◽  
Peng-Xiang Hou ◽  
Shisheng Li ◽  
Chao Shi ◽  
Hong-Tao Cong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
In Situ Tem ◽  
Catalytic Growth ◽  
Single Wall Carbon
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