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

被引：1399

作者：

Zheng, M ^{[1
]}

Jagota, A

Strano, MS

Santos, AP

Barone, P

Chou, SG

Diner, BA

Dresselhaus, MS

McLean, RS

Onoa, GB

Samsonidze, GG

Semke, ED

Usrey, M

Walls, DJ

机构：

[1] DuPont Co Inc, Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA

[2] Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA

[3] MIT, Dept Phys Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[4] CDTN, CNEN, Ctr Desenvolvimento Tecnol Nucl, BR-30123970 Belo Horizonte, MG, Brazil

来源：

SCIENCE | 2003年 / 302卷 / 5650期

关键词：

D O I：

10.1126/science.1091911

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1545 / 1548

页数：4

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