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Solution Phase Production of Graphene with Controlled Thickness via Density Differentiation
Abstract
Graphene flakes with controlled thicknesses are isolated in solution using density gradient ultracentrifugation. These stable graphene dispersions are produced using the bile salt sodium cholate, which promotes graphite exfoliation and results in graphene-surfactant complexes having buoyant densities that vary with graphene thickness. The sorted graphene flakes are characterized using atomic force microscopy and Raman spectroscopy. Graphene dispersions produced using density differentiation offer superior performance in transparent conductors than those produced using conventional sedimentation-based centrifugation techniques.
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Metadata
- Authors
- Green, A. A., & Hersam, M. C.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-09-25
- Volume
- 9
- Issue
- 12
- Pages
- 4031-4036
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2033454427
- Cited by
- 755
- References
- 36
- FWCI
- 27.75
- Type
- journal article
- Language
- en
- Open access
- closed
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