Large-scale aligned carbon nanotubes from their purified, highly concentrated suspension

L. Lu, Wei Chen

Research output: Journal article publicationConference articleAcademic researchpeer-review

62 Citations (Scopus)

Abstract

Large-scale aligned single-walled carbon nanotube (SWCNT) composite membranes have been successfully prepared from highly concentrated purified SWCNT suspensions. Biopolymer dispersant gellan gum was used to achieve aqueous dispersion of highly concentrated SWCNTs, which can be used to form the SWCNT liquid crystal phase. To achieve alignment of SWCNTs, purification of SWCNTs is found to be very important. Purification was achieved by a facile and nondestructive physical method that can prepare large volumes of SWCNTs in high yield for experimental use. Composite membranes of aligned SWCNTs could be obtained by simple evaporation SWCNT liquid crystal. The orientation direction of aligned SWCNTs was controlled by mechanical shearing of SWCNT liquid crystal. The aligned SWCNTs in the biopolymer matrix were observed by electron microscopy, and the anisotropic electrical performance of this composite thin film has been characterized. © 2010 American Chemical Society.
Original languageEnglish
Pages (from-to)1042-1048
Number of pages7
JournalACS Nano
Volume4
Issue number2
DOIs
Publication statusPublished - 23 Feb 2010
Externally publishedYes

Keywords

  • Gellan gum
  • High concentration
  • Liquid crystal
  • Purification
  • SWCNT alignment

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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