Volume 173, 2014
From the journal:

Faraday Discussions

Gel electrophoresis using a selective radical for the separation of single-walled carbon nanotubes

Sara Mesgari,a   Ashok Kumar Sundramoorthy,a   Leslie S. Loo*a  and  Mary B. Chan-Park*a  

* Corresponding authors

a School of Chemical & Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
E-mail: mbechan@ntu.edu.sg
Fax: +65 6794 7553
Tel: +65 6790 6064

Abstract

We have applied agarose gel electrophoresis (AGE) to single-walled carbon nanotubes (SWNTs) that have been pre-reacted with metallic-selective ionic radicals and then re-suspended with sodium cholate (SC) surfactant to obtain highly purified (up to 98%) semiconducting single-walled carbon nanotubes (s-SWNTs). The proposed combination method exploits the preferential reactivity with the metallic nanotube of the radicals generated from an azo naphthalene compound (Direct Blue 71 (I)) to preferentially increase the surface charge, and therefore the electrophoretic mobilities, of the metallic nanotube population under the influence of the electric field in AGE. The excellent separation achieved was verified by UV-vis-NIR and Raman spectroscopy as well as by the performance of field effect transistors fabricated with semiconducting-enriched SWNTs. FETs fabricated with I-assisted AGE-separated semiconducting nanotubes exhibited mobilities of ∼3.6 to 11.7 cm2 V−1 s−1 and on/off ratios from 102 to 106.

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Article information

DOI
https://doi.org/10.1039/C4FD00092G
Article type
Paper
Submitted
05 May 2014
Accepted
09 Jun 2014
First published
09 Jun 2014
This article is Open Access
Creative Commons BY-NC license

Faraday Discuss., 2014,173, 351-363

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Gel electrophoresis using a selective radical for the separation of single-walled carbon nanotubes

S. Mesgari, A. K. Sundramoorthy, L. S. Loo and M. B. Chan-Park, Faraday Discuss., 2014, 173, 351 DOI: 10.1039/C4FD00092G

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