Imperial College London
Professor Nick Quirke

ProfessorNickQuirke

Faculty of Natural Sciences, Department of Chemistry

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 5844n.quirke

 
 
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Location

 

Molecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Shen:2015:10.1063/1.4921402,
author = {Shen, Y and Quirke, N and Zerulla, D},
doi = {10.1063/1.4921402},
journal = {Applied Physics Letters},
title = {Polarisation dependence of the squash mode in the extreme low frequency vibrational region of single walled carbon nanotubes},
url = {http://dx.doi.org/10.1063/1.4921402},
volume = {106},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - There is considerable interest in the vibrational modes of carbon nanotubes as they can be used to determine interaction potentials. In particular, theory predicts the appearance of so called squash modes (SMs, with E 2 g symmetry representation) at very low frequencies. These SMs are expected to be extremely sensitive to environmental changes and thus ideal as nanoscale probes. Here, we report clear experimental evidence for the existence of SMs of ordered, dry, single walled carbon nanotube (SWNT) arrays with peaks as close as 18 cm−1 to the laser excitation. Furthermore, we confirm the theoretical predictions regarding the angular and polarisation dependent variations of the SM's intensity with respect to the excitation. Additionally, using both SM and radial breathing mode data, we unambiguously assign the chirality and diameter of the SWNTs in our sample.
AU  - Shen,Y
AU  - Quirke,N
AU  - Zerulla,D
DO  - 10.1063/1.4921402
PY  - 2015///
SN  - 1077-3118
TI  - Polarisation dependence of the squash mode in the extreme low frequency vibrational region of single walled carbon nanotubes
T2  - Applied Physics Letters
UR  - http://dx.doi.org/10.1063/1.4921402
UR  - http://hdl.handle.net/10044/1/24038
VL  - 106
ER  -
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