Format

Send to

Choose Destination
See comment in PubMed Commons below
Science. 2003 Nov 28;302(5650):1545-8.

Structure-based carbon nanotube sorting by sequence-dependent DNA assembly.

Author information

1
DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880, USA. ming.zheng@usa.dupont.com

Abstract

Wrapping of carbon nanotubes (CNTs) by single-stranded DNA (ssDNA) was found to be sequence-dependent. A systematic search of the ssDNA library selected a sequence d(GT)n, n = 10 to 45 that self-assembles into a helical structure around individual nanotubes in such a way that the electrostatics of the DNA-CNT hybrid depends on tube diameter and electronic properties, enabling nanotube separation by anion exchange chromatography. Optical absorption and Raman spectroscopy show that early fractions are enriched in the smaller diameter and metallic tubes, whereas late fractions are enriched in the larger diameter and semiconducting tubes.

PMID:
14645843
DOI:
10.1126/science.1091911
[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Support Center