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

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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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The article was received on 25 Jul 2011, accepted on 19 Sep 2011 and first published on 20 Oct 2011

Article type: Paper
DOI: 10.1039/C1SM06418E
Citation: Soft Matter, 2011,7, 11154-11159
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    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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