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Issue 23, 2011
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Liquid crystals of aqueous, giant graphene oxide flakes

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Abstract

We report the observation of liquid crystals formed by giant graphene oxide flakes (aspect ratio above 10 000) 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.

Graphical abstract: Liquid crystals of aqueous, giant graphene oxide flakes

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Article information


Submitted
25 Jul 2011
Accepted
19 Sep 2011
First published
20 Oct 2011

Soft Matter, 2011,7, 11154-11159
Article type
Paper

Liquid crystals of aqueous, giant graphene oxide flakes

B. Dan, N. Behabtu, A. Martinez, J. S. Evans, D. V. Kosynkin, J. M. Tour, M. Pasquali and I. I. Smalyukh, Soft Matter, 2011, 7, 11154
DOI: 10.1039/C1SM06418E

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