Separation of Metallic and Semiconducting Single-Walled Carbon Nanotubes Through Fluorous Chemistry

Ghosh, Sandeep and Rao, CNR (2009) Separation of Metallic and Semiconducting Single-Walled Carbon Nanotubes Through Fluorous Chemistry. In: Nano Research, 2 (3). pp. 183-191.

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Abstract

Separation of metallic from semiconducting single-walled carbon nanotubes has been a major challenge for some time and some previous efforts have resulted in partial success. We have accomplished the separation effectively by employing fluorous chemistry wherein the diazonium salt of 4-heptadecafluorooc tylaniline selectively reacts with the metallic nanotubes present in the mixture of nanotubes. The resulting fluoroderivative was extracted in perfluorohexane leaving the semiconducting nanotubes in the aqueous layer. The products have been characterized by both Raman and electronic absorption spectroscopy. The method avoids the cumbersome centrifugation step required by some other procedures.

Item Type:	Journal Article
Publication:	Nano Research
Publisher:	Tsinghua University Press, co-published with Springer
Additional Information:	Copyright for this article belongs to Tsinghua University Press and Springer.
Keywords:	Carbon nanotubes; metallic; semiconducting; fluorous; separation
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	09 Feb 2010 11:27
Last Modified:	19 Sep 2010 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/25506

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