@article{Tu2008, 
author = {Xiaomin Tu and Ming Zheng},
title = {A DNA-Based Approach to the Carbon Nanotube Sorting Problem},
year = {2008},
journal = {Nano Research},
volume = {1},
number = {3},
pages = {185-194},
keywords = {Carbon nanotube separation, DNA-wrapped carbon nanotubes, metallic and semiconducting tubes},
url = {https://www.sciopen.com/article/10.1007/s12274-008-8022-7},
doi = {10.1007/s12274-008-8022-7},
abstract = {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.}
}