Direct visualization of large-area graphene domains and boundaries by optical birefringency

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The boundaries between domains in single-layer graphene strongly influence its electronic properties. However, existing approaches for domain visualization, which are based on microscopy and spectroscopy, 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.
Publisher
한국화학공학회
Issue Date
2012-04
Language
ENG
Citation

2012 봄 총회 및 학술대회 한국화학공학회

URI
http://hdl.handle.net/10203/170706
Appears in Collection
CBE-Conference Papers(학술회의논문)
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