Contact electrification and adhesion between dissimilar materials

Horn, Roger G. and Smith, Douglas T. 1992, Contact electrification and adhesion between dissimilar materials, Science, vol. 256, no. 5055, pp. 362-364.

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Title Contact electrification and adhesion between dissimilar materials
Author(s) Horn, Roger G.
Smith, Douglas T.
Journal name Science
Volume number 256
Issue number 5055
Start page 362
End page 364
Total pages 3
Publisher American Association for the Advancement of Science
Place of publication Washington, D.C.
Publication date 1992-04-17
ISSN 0036-8075
1095-9203
Keyword(s) Dielectric Materials--Adhesion
Electric Discharges--Surface Phenomena
Electrostatics--Electric Charge
Friction--Electric Field Effects
Triboelectricity--Triboelectric Emission
Summary Simultaneous measurements of surface force and surface charge demonstrate strong attraction due to the spontaneous transfer of electrical charge from one smooth insulator (mica) to another (silica) as a result of simple, nonsliding contact in dry nitrogen. The measured surface charge densities are 5 to 20 millicoulombs per square meter after contact. The work required to separate the charged surfaces is typically 6 to 9 joules per square meter, comparable to the fracture energies of ionic-covalent materials. Observation of partial gas discharges when the surfaces are approximately 1 micrometer apart gives valuable insight into the charge separation processes underlying static electrical phenomena in general.
Language eng
Field of Research 029999 Physical Sciences not elsewhere classified
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1992, American Association for the Advancement of Science
Persistent URL http://hdl.handle.net/10536/DRO/DU:30041470

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