Authors
Anton N Sidorov, Mehdi M Yazdanpanah, Romaneh Jalilian, PJ Ouseph, RW Cohn, GU Sumanasekera
Publication date
2007/2/28
Journal
Nanotechnology
Volume
18
Issue
13
Pages
135301
Publisher
IOP Publishing
Description
Loose graphene sheets, one to a few atomic layers thick, are often observed on freshly cleaved HOPG surfaces. A straightforward technique using electrostatic attraction is demonstrated to transfer these graphene sheets to a selected substrate. Sheets from one to 22 layers thick have been transferred by this method. One sheet after initial deposition is measured by atomic force microscopy to be only an atomic layer thick (∼ 0.35 nm). A few weeks later, this height is seen to increase to∼ 0.8 nm. Raman spectroscopy of a single layer sheet shows the emergence of an intense D band which dramatically decreases as the number of layers in the sheet increase. The intense D band in monolayer graphene is attributed to the graphene conforming to the roughness of the substrate. The disruption of the C–C bonds within the single graphene layer could also contribute to this intense D band as evidenced by the emergence …
Total citations
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Scholar articles
AN Sidorov, MM Yazdanpanah, R Jalilian, PJ Ouseph… - Nanotechnology, 2007