| Rapid identification of graphene flakes: alumina does it better. | |
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MedLine Citation:
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PMID: 20516580 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We report a systematic investigation of the colour contrast (CC) of graphene (one, two and three layers) on 50, 72 and 80 nm thick Al(2)O(3)/Si(100) and 100 and 300 nm thick SiO(2)/Si(100). The CC is determined by the analysis of optical microscopy images taken under white light illumination. A corresponding assignment of graphene in the single-layer, double-layer and trilayer phases is made using micro-Raman spectroscopy. A quantitative evaluation allows us to conclude that the colour contrast between 72 nm alumina and graphene is significantly larger than that between 300 nm silicon oxide and graphene (by factors of 2.2, 2.0 and 3.3 for the single-layer, double-layer and trilayer graphene flakes respectively). Moreover, data indicate that, to increase visibility, the use of a red or a green light is preferable. |
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Authors:
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P De Marco; M Nardone; A Del Vitto; M Alessandri; S Santucci; L Ottaviano |
Publication Detail:
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Type: Journal Article Date: 2010-06-02 |
Journal Detail:
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Title: Nanotechnology Volume: 21 ISSN: 1361-6528 ISO Abbreviation: Nanotechnology Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-02 Completed Date: 2010-08-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: England |
Other Details:
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Languages: eng Pagination: 255703 Citation Subset: - |
Affiliation:
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Dipartimento di Fisica, Università dell'Aquila, Coppito-L'Aquila, Italy. patrizia.demarco@aquila.infn.it |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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