Liquid crystals of aqueous, giant graphene oxide flakes

Budhadipta Dan, Natnael Behabtu, Angel Martinez, Julian S. Evans, Dmitry V. Kosynkin, James M. Tour, Matteo Pasquali, Ivan I. Smalyukh

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

Abstract

We report the observation of liquid crystals formed by giant graphene oxide flakes (aspect ratio above 10000) suspended in water. As their concentration increases, the flakes undergo transitions from an isotropic dispersion to a biphasic system and then to a discotic nematic liquid crystal. The gel-like liquid crystal displays an unusual defect-free uniform director alignment over hundreds of micrometres. We characterize the nematic order parameter, optical birefringence and elastic properties of this novel mesomorphic system.

Original languageEnglish (US)
Pages (from-to)11154-11159
Number of pages6
JournalSoft matter
Volume7
Issue number23
DOIs
StatePublished - Nov 7 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

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