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Resonance Raman Spectroscopy of extreme nanowires and other 1D systems

Resonance Raman Spectroscopy of extreme nanowires and other 1D systems
Resonance Raman Spectroscopy of extreme nanowires and other 1D systems
This paper briefly describes how nanowires with diameters corresponding to 1 to 5 atoms can be produced by melting a range of inorganic solids in the presence of carbon nanotubes. These nanowires are extreme in the sense that they are the limit of miniaturization of nanowires and their behavior is not always a simple extrapolation of the behavior of larger nanowires as their diameter decreases. The paper then describes the methods required to obtain Raman spectra from extreme nanowires and the fact that due to the van Hove singularities that 1D systems exhibit in their optical density of states, that determining the correct choice of photon excitation energy is critical. It describes the techniques required to determine the photon energy dependence of the resonances observed in Raman spectroscopy of 1D systems and in particular how to obtain measurements of Raman cross-sections with better than 8% noise and measure the variation in the resonance as a function of sample temperature. The paper describes the importance of ensuring that the Raman scattering is linearly proportional to the intensity of the laser excitation intensity. It also describes how to use the polarization dependence of the Raman scattering to separate Raman scattering of the encapsulated 1D systems from those of other extraneous components in any sample.
1940-087X
1-14
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Spencer, Joseph H.
4ae3c181-002e-491d-a9c3-8936062a49c8
Sloan, Jeremy
30ae48dd-fe5d-402c-bb7b-ea7b0af29b99
McDonnell, Liam P.
f55afd9a-aa83-4a34-b3ac-c1b9ff3858b9
Trewhitt, Harrison
fc193175-3db6-4043-b0f1-95ba1245d848
Kashtiban, Reza J.
2f6b0979-49ee-4e16-9c52-1ed7653c0485
Faulques, Eric
22ecb715-3837-4156-835e-757e7d94fe4c
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Spencer, Joseph H.
4ae3c181-002e-491d-a9c3-8936062a49c8
Sloan, Jeremy
30ae48dd-fe5d-402c-bb7b-ea7b0af29b99
McDonnell, Liam P.
f55afd9a-aa83-4a34-b3ac-c1b9ff3858b9
Trewhitt, Harrison
fc193175-3db6-4043-b0f1-95ba1245d848
Kashtiban, Reza J.
2f6b0979-49ee-4e16-9c52-1ed7653c0485
Faulques, Eric
22ecb715-3837-4156-835e-757e7d94fe4c

Smith, David C., Spencer, Joseph H., Sloan, Jeremy, McDonnell, Liam P., Trewhitt, Harrison, Kashtiban, Reza J. and Faulques, Eric (2016) Resonance Raman Spectroscopy of extreme nanowires and other 1D systems. Journal of Visualized Experiments, (110), 1-14. (doi:10.3791/53434).

Record type: Article

Abstract

This paper briefly describes how nanowires with diameters corresponding to 1 to 5 atoms can be produced by melting a range of inorganic solids in the presence of carbon nanotubes. These nanowires are extreme in the sense that they are the limit of miniaturization of nanowires and their behavior is not always a simple extrapolation of the behavior of larger nanowires as their diameter decreases. The paper then describes the methods required to obtain Raman spectra from extreme nanowires and the fact that due to the van Hove singularities that 1D systems exhibit in their optical density of states, that determining the correct choice of photon excitation energy is critical. It describes the techniques required to determine the photon energy dependence of the resonances observed in Raman spectroscopy of 1D systems and in particular how to obtain measurements of Raman cross-sections with better than 8% noise and measure the variation in the resonance as a function of sample temperature. The paper describes the importance of ensuring that the Raman scattering is linearly proportional to the intensity of the laser excitation intensity. It also describes how to use the polarization dependence of the Raman scattering to separate Raman scattering of the encapsulated 1D systems from those of other extraneous components in any sample.

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jove-protocol-53434-resonance-raman-spectroscopy-of-extreme-nanowires-and-other-1d-systems - Version of Record
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More information

Accepted/In Press date: 11 September 2015
e-pub ahead of print date: 28 April 2016
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 393663
URI: http://eprints.soton.ac.uk/id/eprint/393663
ISSN: 1940-087X
PURE UUID: 8ab46f44-bcb2-4899-a77c-f83e918f54c0

Catalogue record

Date deposited: 03 May 2016 08:28
Last modified: 21 Nov 2021 01:22

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Contributors

Author: David C. Smith
Author: Joseph H. Spencer
Author: Jeremy Sloan
Author: Liam P. McDonnell
Author: Harrison Trewhitt
Author: Reza J. Kashtiban
Author: Eric Faulques

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