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Publication Type
Journal Article
UWI Author(s)
Author, Analytic
Mulder, Willem H.; Calvente, Juan Josť; Andreu, Rafael
Author Affiliation, Ana.
Department of Chemistry
Article Title
The electrocapillary effect at an electrode modified with an insoluble redox-active self-assembled monolayer
Medium Designator
n/a
Connective Phrase
n/a
Journal Title
Langmuir: The ACS journal of surfaces and colloids. [Langmuir]
Translated Title
n/a
Reprint Status
n/a
Date of Publication
2004
Volume ID
20
Issue ID
3
Page(s)
869-874.
Language
n/a
Connective Phrase
n/a
Location/URL
http:; search.epnet.com/login.aspx?direct=true&db=cmedm&an=15773117
ISSN
0743-7463
Notes
n/a
Abstract
The interface between an electrolyte solution and a metal electrode coated with an oxidatively adsorbed, redox-active monolayer of long-chain thiols has been examined from a thermodynamic point of view. The electrode potential is assumed to vary within the region where no reductive desorption of the thiol occurs, so that the interface may formally be regarded as ideally polarizable. The analysis leads to an expression describing the potential dependence of interfacial tension in terms of the charge density on the metal, salt concentration, dielectric properties of the organic film, and the redox properties of the active terminal groups, which vary with the (average) distance from the electrode surface. This result generalizes the classical Lippmann equation to modified electrodes of the type considered.....
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Keywords