Nano Research

, Volume 2, Issue 3, pp 183–191

Separation of metallic and semiconducting single-walled carbon nanotubes through fluorous chemistry

Open AccessResearch Article

DOI: 10.1007/s12274-009-9016-9

Cite this article as:
Ghosh, S. & Rao, C.N.R. Nano Res. (2009) 2: 183. doi:10.1007/s12274-009-9016-9


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.


Carbon nanotubesmetallicsemiconductingfluorousseparation
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© Tsinghua University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  1. 1.Chemistry and Physics of Materials Unit, DST unit on Nanoscience and CSIR Centre of Excellence in ChemistryJawaharlal Nehru Centre for Advanced Scientific ResearchJakkur P.O., BangaloreIndia
  2. 2.Solid State and Structural Chemistry UnitIndian Institute of ScienceBangaloreIndia