The environment of graphene probed by electrostatic force microscopy

J. Moser, A. Verdaguer, D. Jiḿnez, A. Barreiro, A. Bachtold

Research output: Contribution to journalArticleResearchpeer-review

150 Citations (Scopus)

Abstract

We 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 ∼ 109 V m-1. We expect that water molecules can significantly modify the electrical properties of graphene devices. © 2008 American Institute of Physics.
Original languageEnglish
Article number123507
JournalApplied Physics Letters
Volume92
DOIs
Publication statusPublished - 3 Apr 2008

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