Isolation of single-walled carbon nanotube enantiomers by density differentiation

Alexander A. Green, Matthew C. Duch, Mark C Hersam

Research output: Contribution to journalArticle

120 Citations (Scopus)

Abstract

Current methods of synthesizing single-walled carbon nanotubes (SWNTs) result in racemic mixtures that have impeded the study of left- and right-handed SWNTs. Here we present a method of isolating different SWNT enantiomers using density gradient ultracentrifugation. Enantiomer separation is enabled by the chiral surfactant sodium cholate, which discriminates between left- and right-handed SWNTs and thus induces subtle differences in their buoyant densities. This sorting strategy can be employed for simultaneous enrichment by handedness and roll-up vector of SWNTs having diameters ranging from 0.7 to 1.5 nm. In addition, circular dichroism of enantiomer refined samples enables identification of high-energy optical transitions in SWNTs.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalNano Research
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 2009

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Enantiomers
Single-walled carbon nanotubes (SWCN)
Sodium Cholate
Optical transitions
Dichroism
Sorting
Surface-Active Agents
Surface active agents
Sodium

Keywords

  • Carbon nanotube
  • Chirality
  • Enantiomer
  • Handedness
  • Optical activity
  • Separation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)

Cite this

Isolation of single-walled carbon nanotube enantiomers by density differentiation. / Green, Alexander A.; Duch, Matthew C.; Hersam, Mark C.

In: Nano Research, Vol. 2, No. 1, 01.2009, p. 69-77.

Research output: Contribution to journalArticle

Green, Alexander A. ; Duch, Matthew C. ; Hersam, Mark C. / Isolation of single-walled carbon nanotube enantiomers by density differentiation. In: Nano Research. 2009 ; Vol. 2, No. 1. pp. 69-77.
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