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Forces measured between latex spheres in aqueous electrolyte : Non-DLVO behavior and sensitivity to dissolved gas

Considine, R. F., Hayes, R. A. and Horn, R. G. 1999, Forces measured between latex spheres in aqueous electrolyte : Non-DLVO behavior and sensitivity to dissolved gas, Langmuir, vol. 15, no. 5, pp. 1657-1659.

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Title Forces measured between latex spheres in aqueous electrolyte : Non-DLVO behavior and sensitivity to dissolved gas
Author(s) Considine, R. F.
Hayes, R. A.
Horn, R. G.
Journal name Langmuir
Volume number 15
Issue number 5
Start page 1657
End page 1659
Total pages 3
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 1999-03-02
ISSN 0743-7463
1520-5827
Keyword(s) Atomic force microscopy
Electrolytes
Electrostatics
Force measurement
Polystyrenes
Van der Waals forces
Summary An atomic force microscope was used to measure the forces acting between two polystyrene latex spheres in aqueous media. The results show an electrostatic repulsion at large separations which is overtaken by an attractive “hook” that pulls the two spheres into contact from a considerable range (20−400 nm), much larger than could be expected for a van der Waals attraction. The range of operation of this attraction varies from one experiment to another and is not correlated with electrolyte concentration. However, the range is found to decrease significantly when the level of dissolved gas in the water is reduced.
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 ©1999, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30041442

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