A sessile drop tensiometer provides a simple and efficient method of determining the surface tension of various liquids. The technique involves obtaining the shape of an axisymmetric liquid droplet and iterative fitting of the Young–Laplace equation, which balances the gravitational deformation of the drop. Since the advent of high quality digital cameras and desktop computers, this process has been automated with precision. However, despite its appealing simplicity, there are complications and limitations in a sessile drop tensiometer, i.e., it must dispense spherical droplets with low surface tension. We propose a method of measuring surface tension using a sessile drop tensiometer with a superoleophobic surface fabricated by acidic etching and anodization for liquids with low surface tension and investigate the accuracy of the measurement by changing the wettability of the measuring plate surface.
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19 March 2018
Research Article|
March 21 2018
Measurement of surface tension by sessile drop tensiometer with superoleophobic surface
Wonshik Kwak;
Wonshik Kwak
1
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)
, Pohang 37673, South Korea
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Jun Kwon Park;
Jun Kwon Park
2
FEMTOBIOMED Incorporation
, 228-17 Pangyo-ro, Seongnam 13487, South Korea
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Jinsung Yoon;
Jinsung Yoon
2
FEMTOBIOMED Incorporation
, 228-17 Pangyo-ro, Seongnam 13487, South Korea
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Sanghyun Lee;
Sanghyun Lee
2
FEMTOBIOMED Incorporation
, 228-17 Pangyo-ro, Seongnam 13487, South Korea
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Woonbong Hwang
Woonbong Hwang
a)
1
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH)
, Pohang 37673, South Korea
a)Author to whom corresponding should be addressed: [email protected]
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a)Author to whom corresponding should be addressed: [email protected]
Appl. Phys. Lett. 112, 121602 (2018)
Article history
Received:
November 01 2017
Accepted:
March 10 2018
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Citation
Wonshik Kwak, Jun Kwon Park, Jinsung Yoon, Sanghyun Lee, Woonbong Hwang; Measurement of surface tension by sessile drop tensiometer with superoleophobic surface. Appl. Phys. Lett. 19 March 2018; 112 (12): 121602. https://doi.org/10.1063/1.5011439
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