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Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length

Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length
Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length
In this study, we discuss the influence of DNA strand length on DNA wrapping of single-walled carbon nanotubes under high-shear sonication and find that different strand length results in changed DNA-nanotube interaction, which is sensitively probed by the upshift extent of the Raman radial breathing mode bands of nanotubes due to DNA wrapping. The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. This finding is of considerable interest from both theoretical and practical standpoints.
0957-4484
1-6
Yang, Quan-Hong
a18c6334-fae8-42c5-bb2d-48ec2e080174
Wang, Qi
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Gale, Nittaya
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Oton, Claudio J.
7e0803bc-34e4-4c6d-8f27-1204ef1775da
Cui, Lan
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Nandhakumar, Iris S.
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Zhu, Zhenping
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Tang, Zhiyuan
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Brown, Tom
a64aae36-bb30-42df-88a2-11be394e8c89
Loh, Wei H.
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Yang, Quan-Hong
a18c6334-fae8-42c5-bb2d-48ec2e080174
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Gale, Nittaya
eead6253-2431-407b-ab6b-92e35d41c3ef
Oton, Claudio J.
7e0803bc-34e4-4c6d-8f27-1204ef1775da
Cui, Lan
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Nandhakumar, Iris S.
e9850fe5-1152-4df8-8a26-ed44b5564b04
Zhu, Zhenping
455af7f4-ff68-4086-b2c1-4bb8952576a1
Tang, Zhiyuan
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Brown, Tom
a64aae36-bb30-42df-88a2-11be394e8c89
Loh, Wei H.
2b7c57fe-000d-4405-a529-810597317ea8

Yang, Quan-Hong, Wang, Qi, Gale, Nittaya, Oton, Claudio J., Cui, Lan, Nandhakumar, Iris S., Zhu, Zhenping, Tang, Zhiyuan, Brown, Tom and Loh, Wei H. (2009) Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length. Nanotechnology, 20 (19), 1-6. (doi:10.1088/0957-4484/20/19/195603). (PMID:19420642)

Record type: Article

Abstract

In this study, we discuss the influence of DNA strand length on DNA wrapping of single-walled carbon nanotubes under high-shear sonication and find that different strand length results in changed DNA-nanotube interaction, which is sensitively probed by the upshift extent of the Raman radial breathing mode bands of nanotubes due to DNA wrapping. The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. This finding is of considerable interest from both theoretical and practical standpoints.

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e-pub ahead of print date: 13 May 2008
Published date: 21 April 2009
Organisations: Chemistry

Identifiers

Local EPrints ID: 78858
URI: http://eprints.soton.ac.uk/id/eprint/78858
ISSN: 0957-4484
PURE UUID: d50cce29-3a3b-4854-b194-72b9e92e5636
ORCID for Iris S. Nandhakumar: ORCID iD orcid.org/0000-0002-9668-9126

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Date deposited: 16 Mar 2010
Last modified: 29 Nov 2019 01:38

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Contributors

Author: Quan-Hong Yang
Author: Qi Wang
Author: Nittaya Gale
Author: Claudio J. Oton
Author: Lan Cui
Author: Zhenping Zhu
Author: Zhiyuan Tang
Author: Tom Brown
Author: Wei H. Loh

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