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Direct measurement of surface forces between sapphire crystals in aqueous solutions

journal contribution
posted on 1988-06-01, 00:00 authored by Roger Horn, D Clarke, M Clarkson
Measurements are presented of the electrical double layer and van der Waals forces between the (0001) surfaces of two single-crystal sapphire platelets immersed in an aqueous solution of NaCl at pH values from 6.7 to 11. The results fit the standard Deryaguin-Landau-Verwey-Overbeek (DLVO) theory, with a Hamaker constant of 6.7 × 10−20 J. These are the first measurements made using the Israelachvili surface forces apparatus without mica as a substrate material, and they demonstrate the possibility of using this technique to explore the surface chemistry of a wider range of materials.

History

Journal

Journal of materials research

Volume

3

Issue

3

Pagination

413 - 416

Publisher

Materials Research Society

Location

Pittsburgh, Pa.

ISSN

0884-2914

eISSN

2044-5326

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1988, Materials Research Society