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Measurement of aqueous film thickness between charged mercury and mica surfaces : a direct experimental probe of the Poisson-Boltzmann distribution

Connor, Jason N. and Horn, Roger G. 2001, Measurement of aqueous film thickness between charged mercury and mica surfaces : a direct experimental probe of the Poisson-Boltzmann distribution, Langmuir, vol. 17, no. 23, pp. 7194-7197, doi: 10.1021/la0155505.

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Title Measurement of aqueous film thickness between charged mercury and mica surfaces : a direct experimental probe of the Poisson-Boltzmann distribution
Author(s) Connor, Jason N.
Horn, Roger G.
Journal name Langmuir
Volume number 17
Issue number 23
Start page 7194
End page 7197
Total pages 4
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2001-11-13
ISSN 0743-7463
1520-5827
Keyword(s) Mercury (metal)
Mica
Poisson distribution
Pressure effects
Thickness measurement
Summary A stable aqueous electrolyte film is formed between a mercury drop and a flat mica surface due to electrical double-layer repulsion when a negative potential is applied to the mercury. Film thickness has been measured as a function of applied potential while keeping the film pressure constant. By making measurements in this way, it is possible to map the data directly according to the Poisson-Boltzmann equation. An excellent fit to the data is obtained, providing direct evidence for this classical equation and its use as the basis of the Gouy-Chapman model of the diffuse double layer in electrolyte solutions.
Language eng
DOI 10.1021/la0155505
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:30041439

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