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Wetting tension due to Coulombic interaction in charge-related wetting phenomena SCIE SCOPUS

Title
Wetting tension due to Coulombic interaction in charge-related wetting phenomena
Authors
Kang, KHKANG, IN SEOKLee, CM
Date Issued
2003-06-24
Publisher
AMER CHEMICAL SOC
Abstract
The influence of Coulombic interaction on wetting is elucidated within the framework of electromechanies. The Maxwell stress and osmotic pressure acting on a meniscus are integrated to obtain a concise analytical expression for the Coulombic contribution to wetting tension. The results are verified alternatively by using a thermodynamic approach. The method is applied to three important charge-related wetting configurations in which droplets are placed on a solid substrate. First, when the constant-potential boundary condition is applied at the substrate surface, only the electrocapillary term which represents the electrostatic free energy of the electrical double layer contributes to the wetting tension. Second, in the case of the constant-charge condition, the wetting tension includes an additional edge-effect term. It is found that the wetting tension in this case is dependent on the interface profile near the three-phase contact line. Third, in the case of electrowetting on dielectrics, the wetting tension also includes the edge-effect term. The wetting-tension term appearing in the Lippmann-Young equation is recovered as a special case of the third case.
Keywords
CONTACT-ANGLE; SURFACES; ELECTROLYTE; FILMS
URI
https://oasis.postech.ac.kr/handle/2014.oak/18483
DOI
10.1021/LA034163N
ISSN
0743-7463
Article Type
Article
Citation
LANGMUIR, vol. 19, no. 13, page. 5407 - 5412, 2003-06-24
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강인석KANG, IN SEOK
Dept. of Chemical Enginrg
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