Skip to main content
Article thumbnail
Location of Repository

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

By Quan-Hong Yang, Qi Wang, Nittaya Gale, Claudio J. Oton, Lan Cui, Iris S. Nandhakumar, Zhenping Zhu, Zhiyuan Tang, Tom Brown and Wei H. Loh

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 standpoint

Topics: QC, TK
Year: 2009
OAI identifier: oai:eprints.soton.ac.uk:78858
Provided by: e-Prints Soton
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://dx.doi.org/10.1088/0957... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.