Journal
SOFT MATTER
Volume 7, Issue 23, Pages 11154-11159Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1sm06418e
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Funding
- Institute for Complex Adaptive Matter (ICAM)
- Colorado Renewable and Sustainable Energy Initiative, NSF [DMR-0820579, DMR-0844115, DMR-0847782]
- Air Force Research Lab [FA 8650-07-2-5061]
- Air Force Office of Scientific Research [FA9550-09-1-0590]
- Welch [C-1668]
- U.S. Army Corps of Engineers Environmental Quality and Installation Program [W912HZ-08-C-0054]
- M-I Swaco, LLC.
- Division Of Materials Research [0847782] Funding Source: National Science Foundation
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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.
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