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

Dae Woo Kim; Yun Ho Kim; Hyeon Su Jeong; Hee Tae Jung

doi:10.1038/nnano.2011.198

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

Dae Woo Kim, Yun Ho Kim, Hyeon Su Jeong, Hee Tae Jung

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

209 Citations (Scopus)

Abstract

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 crystal and that of the underlying graphene, which we use to determine the boundaries of macroscopic domains.

Original language	English
Pages (from-to)	29-34
Number of pages	6
Journal	Nature Nanotechnology
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/nnano.2011.198
Publication status	Published - 2012 Jan

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory Program (R0A-2007-000-20037-0, NRF), World Class University Program (R32-2008-000-10142-0, NRF), and the Global Frontier Research Center for Advanced Soft Electronics. The authors especially appreciate helpful discussions with Prof. Mohan Srinivasarao.

All Science Journal Classification (ASJC) codes

Bioengineering
Atomic and Molecular Physics, and Optics
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1038/nnano.2011.198

Cite this

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abstract = "The boundaries between domains in single-layer graphene1-4 strongly influence its electronic properties5-12. However, existing approaches for domain visualization, which are based on microscopy and spectroscopy2,12-16, 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 crystal and that of the underlying graphene, which we use to determine the boundaries of macroscopic domains.",

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

Abstract

Bibliographical note

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