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Title: Existence of a hydrophobic gap at the alkanethiol SAM - Water interface: An interfacial capacitance study
Authors: Sur, Ujjal Kumar
Lakshminarayanan, V.
Issue Date: 15-Oct-2002
Publisher: Elsevier B.V.
Citation: Journal of Colloid and Interface Science, 2002, Vol.254, p410-413
Abstract: The highly hydrophobic neat alkanethiol-coated SAM on evaporated gold shows an unusually low interfacial capacitance in aqueous media. This result cannot be explained by a simple parallel plate model of the double layer with the alkanethiol monolayer as a sole dielectric separator. Interestingly, a hydrophilic SAM prepared from a neat hydroxy thiol does not show any such capacitance lowering in aqueous media. Our results suggest the existence of a “hydrophobic gap” between the alkanethiol SAM–water interface. Such a model is also very much consistent with the predictions of Lum, Chandler, and Weeks theory of length scale dependent hydrophobicity.
Description: Restricted Access.
ISSN: 0021-9797
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Copyright: 2002 Elsevier B.V.
Appears in Collections:Research Papers (SCM)

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