Local triboelectricity on oxide surfaces |
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Authors: | M Saint Jean S Hudlet C Guthmann J Berger |
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Institution: | (1) Groupe de Physique des Solides, Universités de Paris 6 et 7 (CNRS UMR 7588), Tour 23, 2 place Jussieu, 75251 Paris Cedex 05, France, FR |
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Abstract: | In triboelectric phenomena, electric charges are transferred when two materials are touched or rubbed together. We present
in this paper a study of this effect performed on metallic oxides at the nanometric scale by an Atomic Force Microscope in
the resonant mode. We show that following the electrification processes, positive or negative charges can be deposited. From
our experimental data, we conclude that the charge transfer results in an equilibrium final state, the occupied states in
the gap being “surface states” with large density and spread under the surface along a characteristic distance of about 100
nm.
Received 18 March 1998 and Received in final form 8 July 1998 |
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Keywords: | PACS 73 20 -r Surface and interface electron states – 73 40 -c Electronic transport in interface structures – 73 90 +f Other topics in electronic structure and electrical properties of surfaces interfaces and thin films |
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