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Attractive forces between surfaces : what can and cannot be learned from a jump-in study with the surface forces apparatus?

Vinogradova, Olga I. and Horn, Roger G. 2001, Attractive forces between surfaces : what can and cannot be learned from a jump-in study with the surface forces apparatus?, Langmuir, vol. 17, no. 5, pp. 1604-1607, doi: 10.1021/la001534g.

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Title Attractive forces between surfaces : what can and cannot be learned from a jump-in study with the surface forces apparatus?
Author(s) Vinogradova, Olga I.
Horn, Roger G.
Journal name Langmuir
Volume number 17
Issue number 5
Start page 1604
End page 1607
Total pages 4
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2001-03-06
ISSN 0743-7463
1520-5827
Keyword(s) Computational methods
Hydrophobicity
Mathematical models
Parameter estimation
Relaxation processes
Van der Waals forces
Summary We study theoretically the dynamics of film thinning under the action of an attractive surface force near the point of a jump instability. Our approach is illustrated by modeling van der Waals and hydrophobic attractive forces. The main result is that with the hydrophobic force law reported previously it is often impossible to establish the jump separation with any certainty. The surfaces instead approach slowly from a distance which is much larger than the point where an actual jump is expected. We conclude that an attractive force measured by the static jump technique is overestimated, and we formulate principles of a new dynamic jump method. The use of this new technique would permit direct measurements of attractive forces at separations below the static jump distance down to contact of the surfaces.
Language eng
DOI 10.1021/la001534g
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 ©2001, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30041489

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