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The environment of graphene probed by electrostatic force microscopy

AuthorsMoser, Joel ; Verdaguer, Albert ; Jiménez, David; Barreiro, Amelia ; Bachtold, Adrian
KeywordsAdhesive bonding
Electrical conductivity
Issue Date26-Mar-2008
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 92, 123507 (2008)
AbstractWe employ electrostatic force microscopy to study the electrostatic environment of graphene sheets prepared with the micromechanical exfoliation technique. We detect the electric dipole of residues left from the adhesive tape during graphene preparation, as well as the dipole of water molecules adsorbed on top of graphene. Water molecules form a dipole layer that can generate an electric field as large as ~10^9 V m−1. We expect that water molecules can significantly modify the electrical properties of graphene devices.
Description3 pages, 3 figures.-- PACS nrs.: 72.80.Rj, 82.65.+r.-- ArXiv pre-print available at: http://arxiv.org/abs/0803.2032
Publisher version (URL)http://dx.doi.org/10.1063/1.2898501
Appears in Collections:(CIN2) Artículos
(IMB-CNM) Artículos
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