Publication Date:
2003-12-04
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zheng, Ming -- Jagota, Anand -- Strano, Michael S -- Santos, Adelina P -- Barone, Paul -- Chou, S Grace -- Diner, Bruce A -- Dresselhaus, Mildred S -- McLean, Robert S -- Onoa, G Bibiana -- Samsonidze, Georgii G -- Semke, Ellen D -- Usrey, Monica -- Walls, Dennis J -- New York, N.Y. -- Science. 2003 Nov 28;302(5650):1545-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880, USA. ming.zheng@usa.dupont.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14645843" target="_blank"〉PubMed〈/a〉
Keywords:
Anions
;
Base Sequence
;
Chromatography, Ion Exchange
;
DNA, Single-Stranded/*chemistry
;
Deoxyribonucleotides/chemistry
;
Gene Library
;
Hydrogen Bonding
;
Microscopy, Atomic Force
;
*Nanotechnology
;
*Nanotubes, Carbon
;
Nucleic Acid Conformation
;
Repetitive Sequences, Nucleic Acid
;
Semiconductors
;
Spectrum Analysis
;
Spectrum Analysis, Raman
;
Static Electricity
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
