title: Selective generation of single-walled carbon nanotubes with metallic, semiconducting and other unique electronic properties.
abstract: As-synthesized single-walled carbon nanotubes (SWNTs) are mixtures of semiconducting and metallic species and separation of the two is of crucial importance for many applications. In this article, the methods employed for the enrichment of semiconducting and metallic SWNTs are presented, along with possible procedures to prepare either of the species selectively. Equally important are the methods for chirality selection. The discovery of metal-semiconductor transitions in SWNTs induced by interaction with electron donor and acceptor molecules is not only of academic interest, but may also find applications. Synthesis of Y-junction SWNTs with unique electronic properties at the junction is yet to be fully accomplished.
authors.affiliation: Chemistry and Physics of Materials Unit, CSIR Unit of Excellence in Chemistry and International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India. cnrrao@jncasr.ac.in
authors.forename: C N R
authors.initials: CN
authors.lastname: Rao
authors.forename: Rakesh
authors.initials: R
authors.lastname: Voggu
authors.forename: A
authors.initials: A
authors.lastname: Govindaraj