| Interaction between Metal and Graphene: Dependence on the Layer Number of Graphene. | |
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MedLine Citation:
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PMID: 21174405 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The interaction between graphene and metal was investigated by studying the G band splitting in surface-enhanced Raman scattering (SERS) spectra of single-, bi-, and trilayer graphene. The Ag deposition on graphene induced large enhancement of the Raman signal of graphene, indicating SERS of graphene. In particular, the G band was split into two distinct peaks in the SERS spectrum of graphene. The extent of the G band splitting was 13.0 cm(-1) for single-layer, 9.6 cm(-1) for bilayer, and 9.4 cm(-1) for trilayer graphene, whereas the G band in the SERS spectrum of a thick multilayer was not split. The average SERS enhancement factor of the G band was 24 for single-layer, 15 for bilayer, and 10 for trilayer graphene. These results indicate that there is a correlation between SERS enhancement factor and the extent of the G band splitting, and the strongest interaction occurs between Ag and single-layer graphene. Furthermore, the Ag deposition on graphene can induce doping of graphene. The intensity ratio of 2D and G bands (I(2D)/I(G)) decreased after Ag deposition on graphene, indicating doping of graphene. From changes in positions of G and 2D bands after the metal deposition on graphene, Ag deposition induced n-doping of graphene, whereas Au deposition induced p-doping. |
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Authors:
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Jisook Lee; Konstantin S Novoselov; Hyeon Suk Shin |
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Publication Detail:
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Type: Journal Article Date: 2010-12-21 |
Journal Detail:
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Title: ACS nano Volume: 5 ISSN: 1936-086X ISO Abbreviation: ACS Nano Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-01-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101313589 Medline TA: ACS Nano Country: United States |
Other Details:
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Languages: eng Pagination: 608-12 Citation Subset: IM |
Affiliation:
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Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Banyeon-ri 100, Ulsan 689-805, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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