Spin probe ESR studies of dynamics of single walled carbon nanotubes

A. K. Dhami; Shrivalli Bhat; Ajay Sharma; S. V. Bhat

doi:10.1016/j.saa.2007.06.034

Spin probe ESR studies of dynamics of single walled carbon nanotubes

A. K. Dhami, Shrivalli Bhat, Ajay Sharma, S. V. Bhat^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The highly sensitive technique of spin-probe Electron Spin Resonance (ESR) has been used to study dynamics of carbon nanotubes. The ESR signals were recorded for the nitroxide free radical TEMPO in carbon nanotubes from 5 to 300 K. The onset of the fast dynamics of the probe molecule was indicated by appearance of a narrow triplet at 230 K. The ESR measurements were also done on TEMPO in methanol for the comparative studies in the same temperature range, and in the latter observations, no change in spectra was seen around 230 K. The results indicate the occurrence of a change in the dynamics of carbon nanotubes around this temperature.

Original language	English (US)
Pages (from-to)	1178-1182
Number of pages	5
Journal	Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume	69
Issue number	4
DOIs	https://doi.org/10.1016/j.saa.2007.06.034
State	Published - Apr 2008

Keywords

Carbon nanotubes
ESR
Low temperature
Spin probe

ASJC Scopus subject areas

Analytical Chemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Spectroscopy

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10.1016/j.saa.2007.06.034

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title = "Spin probe ESR studies of dynamics of single walled carbon nanotubes",

abstract = "The highly sensitive technique of spin-probe Electron Spin Resonance (ESR) has been used to study dynamics of carbon nanotubes. The ESR signals were recorded for the nitroxide free radical TEMPO in carbon nanotubes from 5 to 300 K. The onset of the fast dynamics of the probe molecule was indicated by appearance of a narrow triplet at 230 K. The ESR measurements were also done on TEMPO in methanol for the comparative studies in the same temperature range, and in the latter observations, no change in spectra was seen around 230 K. The results indicate the occurrence of a change in the dynamics of carbon nanotubes around this temperature.",

keywords = "Carbon nanotubes, ESR, Low temperature, Spin probe",

author = "Dhami, {A. K.} and Shrivalli Bhat and Ajay Sharma and Bhat, {S. V.}",

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doi = "10.1016/j.saa.2007.06.034",

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T1 - Spin probe ESR studies of dynamics of single walled carbon nanotubes

AU - Dhami, A. K.

AU - Bhat, Shrivalli

AU - Sharma, Ajay

AU - Bhat, S. V.

PY - 2008/4

Y1 - 2008/4

N2 - The highly sensitive technique of spin-probe Electron Spin Resonance (ESR) has been used to study dynamics of carbon nanotubes. The ESR signals were recorded for the nitroxide free radical TEMPO in carbon nanotubes from 5 to 300 K. The onset of the fast dynamics of the probe molecule was indicated by appearance of a narrow triplet at 230 K. The ESR measurements were also done on TEMPO in methanol for the comparative studies in the same temperature range, and in the latter observations, no change in spectra was seen around 230 K. The results indicate the occurrence of a change in the dynamics of carbon nanotubes around this temperature.

AB - The highly sensitive technique of spin-probe Electron Spin Resonance (ESR) has been used to study dynamics of carbon nanotubes. The ESR signals were recorded for the nitroxide free radical TEMPO in carbon nanotubes from 5 to 300 K. The onset of the fast dynamics of the probe molecule was indicated by appearance of a narrow triplet at 230 K. The ESR measurements were also done on TEMPO in methanol for the comparative studies in the same temperature range, and in the latter observations, no change in spectra was seen around 230 K. The results indicate the occurrence of a change in the dynamics of carbon nanotubes around this temperature.

KW - Carbon nanotubes

KW - ESR

KW - Low temperature

KW - Spin probe

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Spin probe ESR studies of dynamics of single walled carbon nanotubes

Abstract

Keywords

ASJC Scopus subject areas

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