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Time-resolved measurement of equilibrium surface tensions at the electrified mercury-aqueous sodium fluoride interphase by the method of Wilhelmy

Montgomery, Donald D. and Anson, Fred C. (1991) Time-resolved measurement of equilibrium surface tensions at the electrified mercury-aqueous sodium fluoride interphase by the method of Wilhelmy. Langmuir, 7 (5). pp. 1000-1004. ISSN 0743-7463. https://resolver.caltech.edu/CaltechAUTHORS:20180720-112442312

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Abstract

The Wilhelmy plate technique for measuring static and dynamic surface tensions was extended to the electrified mercury-aqueous electrolyte interphase. Several modifications to a conventional Wilhelmy plate are described, which were necessary to implement the technique within an electrochemical environment. Proper isolation of the Wilhelmy plate and associated instrument from vibration allowed sensitivities to be reached that were about 5 times greater than those attainable with maximum bubble pressure measurements. The surface tensions at the electrified mercury-aqueous NaF interphase measured with the modified Wilhelmy plate instrument agreed well with literature values. The capability of the instrument described for making rapid measurements of surface tensions was exploited to observe intrinsic fluctuations in the equilibrium surface tensions. The importance of intrinsic fluctuations and time-averaging for precise evaluation of the equilibrium surface tension are discussed.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/la00053a031DOIArticle
Additional Information:© 1991 American Chemical Society. Received May 25, 1990. In Final Form: October 17, 1990. This work was supported by the National Science Foundation and the US. Army Research Office.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Arthur Amos Noyes Laboratory of Chemical Physics8150
Issue or Number:5
Record Number:CaltechAUTHORS:20180720-112442312
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180720-112442312
Official Citation:Time-resolved measurement of equilibrium surface tensions at the electrified mercury-aqueous sodium fluoride interphase by the method of Wilhelmy Donald D. Montgomery and Fred C. Anson Langmuir 1991 7 (5), 1000-1004 DOI: 10.1021/la00053a031
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88061
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:23 Jul 2018 21:55
Last Modified:03 Oct 2019 20:02

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