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A Raman probe for selective wrapping of single-walled carbon nanotubes by DNA

A Raman probe for selective wrapping of single-walled carbon nanotubes by DNA
A Raman probe for selective wrapping of single-walled carbon nanotubes by DNA
In this paper, we discuss nanotube diameter selectivity in DNA wrapping of single-walled carbon nanotubes (SWNTs) under high-shear sonication and present Raman evidence for the selective wrapping. The DNA wrapping induces an upshift (an increase in wavenumber) of the radial breathing mode (RBM) bands in the Raman spectra of SWNTs, which indicates strong interaction between nanotubes and DNA. The extent of the upshift correlates well with the change in the intensity of the RBM bands upon DNA wrapping, and larger upshifts correspond to larger intensity changes. The intensity changes represent wrapping selectivity, and differ from tube to tube due to varying diameters and electronic properties. The shift of the RBM bands thus represents a practical probe for wrapping selectivity and the extent of the shifts indicates different electronic structures of core nanotubes hybridized with DNA.
0957-4484
1-5
Yang, Quan-Hong
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Gale, Nittaya
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Oton, Claudio J.
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Li, Feng
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Vaughan, Alun
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Saito, Riichiro
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Nandhakumar, Iris S.
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Tang, Zhi Yuan
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Cheng, Hui-Ming
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Brown, Tom
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Loh, Wei
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Yang, Quan-Hong
a18c6334-fae8-42c5-bb2d-48ec2e080174
Gale, Nittaya
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Oton, Claudio J.
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Li, Feng
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Vaughan, Alun
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Saito, Riichiro
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Nandhakumar, Iris S.
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Tang, Zhi Yuan
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Cheng, Hui-Ming
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Brown, Tom
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Loh, Wei
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Yang, Quan-Hong, Gale, Nittaya, Oton, Claudio J., Li, Feng, Vaughan, Alun, Saito, Riichiro, Nandhakumar, Iris S., Tang, Zhi Yuan, Cheng, Hui-Ming, Brown, Tom and Loh, Wei (2007) A Raman probe for selective wrapping of single-walled carbon nanotubes by DNA. Nanotechnology, 18 (40), 1-5. (doi:10.1088/0957-4484/18/40/405706).

Record type: Article

Abstract

In this paper, we discuss nanotube diameter selectivity in DNA wrapping of single-walled carbon nanotubes (SWNTs) under high-shear sonication and present Raman evidence for the selective wrapping. The DNA wrapping induces an upshift (an increase in wavenumber) of the radial breathing mode (RBM) bands in the Raman spectra of SWNTs, which indicates strong interaction between nanotubes and DNA. The extent of the upshift correlates well with the change in the intensity of the RBM bands upon DNA wrapping, and larger upshifts correspond to larger intensity changes. The intensity changes represent wrapping selectivity, and differ from tube to tube due to varying diameters and electronic properties. The shift of the RBM bands thus represents a practical probe for wrapping selectivity and the extent of the shifts indicates different electronic structures of core nanotubes hybridized with DNA.

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Published date: October 2007
Organisations: Optoelectronics Research Centre, Chemistry, Electrochemistry, EEE, Molecular Diagnostics & Thereputics, Chemical Biology Group

Identifiers

Local EPrints ID: 265465
URI: http://eprints.soton.ac.uk/id/eprint/265465
ISSN: 0957-4484
PURE UUID: 5ebe2fb9-035d-456d-953d-1f505685772d
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X
ORCID for Iris S. Nandhakumar: ORCID iD orcid.org/0000-0002-9668-9126

Catalogue record

Date deposited: 24 Apr 2008 10:52
Last modified: 27 Apr 2022 01:42

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Contributors

Author: Quan-Hong Yang
Author: Nittaya Gale
Author: Claudio J. Oton
Author: Feng Li
Author: Alun Vaughan ORCID iD
Author: Riichiro Saito
Author: Zhi Yuan Tang
Author: Hui-Ming Cheng
Author: Tom Brown
Author: Wei Loh

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