Journal
NATURE NANOTECHNOLOGY
Volume 7, Issue 1, Pages 29-34Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2011.198
Keywords
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Funding
- National Research Laboratory, NRF [R0A-2007-000-20037-0]
- World Class University, NRF [R32-2008-000-10142-0]
- Global Frontier Research Center for Advanced Soft Electronics
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The boundaries between domains in single-layer graphene(1-4) strongly influence its electronic properties(5-12). However, existing approaches for domain visualization, which are based on microscopy and spectroscopy(2,12-16), are only effective for domains that are less than a few micrometres in size. Here, we report a simple method for the visualization of arbitrarily large graphene domains by imaging the birefringence of a graphene surface covered with nematic liquid crystals. The method relies on a correspondence between the orientation of the liquid crystals and that of the underlying graphene, which we use to determine the boundaries of macroscopic domains.
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