Nano Research

, Volume 1, Issue 3, pp 185–194

A DNA-based approach to the carbon nanotube sorting problem

Open Access
Review Article

DOI: 10.1007/s12274-008-8022-7

Cite this article as:
Tu, X. & Zheng, M. Nano Res. (2008) 1: 185. doi:10.1007/s12274-008-8022-7


Carbon nanotube sorting, i.e., the separation of a mixture of tubes into different electronic types and further into species with a specific chirality, is a fascinating problem of both scientific and technological importance. It is one of those problems that are easy to describe but difficult to solve. Single-stranded DNA forms stable complexes with carbon nanotubes and disperses them effectively in water. A particular DNA sequence of alternating guanine (G) and thymine (T) nucleotides ((GT)n, with n = 10 to 45) self-assembles into an ordered supramolecular structure around an individual nanotube, in such a way that the electrostatic properties of the DNA-carbon nanotube hybrid depend on tube structure, enabling nanotube separation by anion-exchange chromatography. This review provides a summary of the separation of metallic and semiconducting tubes, and purification of single (n, m) tubes using the DNA-wrapping approach. We will present our current understanding of the DNA-carbon nanotube hybrid structure and separation mechanisms, and predict future developments of the DNA-based approach.


Carbon nanotube separation DNA-wrapped carbon nanotubes metallic and semiconducting tubes 

Copyright information

© Tsinghua Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  1. 1.DuPont Central Research and DevelopmentWilmingtonUSA

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