Surface-roughness-induced electric-field enhancement and triboluminescence

Lazic, P.; Persson, B. N. J.

doi:10.1209/0295-5075/91/46003

Journal Article

PreJuSER-12959

Surface-roughness-induced electric-field enhancement and triboluminescence

Lazic, P. ; Persson, B. N. J.FZJ*

2010
EDP Sciences Les Ulis

epl 91, 46003 (2010) [10.1209/0295-5075/91/46003]

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Please use a persistent id in citations: http://hdl.handle.net/2128/22962 doi:10.1209/0295-5075/91/46003

Abstract: The separation of solids in adhesive contact, or the fracture of solid bodies, often results in the emission of high-energy photons, e. g., visible light and X-rays. This is believed to be related to charge separation. We propose that the emission of high-energy photons involves surface roughness and surface diffusion of ions or electrons, resulting in the concentration of charge at the tips of high asperities, and to electric-field enhancement, which facilitate the discharging process which result in the high-energy photons. If the surface diffusion is too fast, or the separation of the solid surfaces too slow, discharging starts at small interfacial separation resulting in low-energy photons. Copyright (C) EPLA, 2010

Keyword(s): J

Classification:

Physics, Multidisciplinary

Note: BNJP was supported by Invitation Fellowship Programs for Research in Japan from the Japan Society of Promotion of Science (JSPS). This work, as part of the European Science Foundation EUROCORES Program FANAS, was supported from funds by the DFG and the EC Sixth Framework Program, under contract N ERAS-CT-2003-980409. PL acknowledges the support of the Alexander von Humboldt Foundation.

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