la6b04437_si_001.avi (2.26 MB)
Solid–Liquid Work of Adhesion
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posted on 2017-01-25, 00:00 authored by Rafael Tadmor, Ratul Das, Semih Gulec, Jie Liu, Hartmann E. N’guessan, Meet Shah, Priyanka S. Wasnik, Sakshi B. YadavWe
establish a tool for direct measurements of the work needed to separate a liquid from a solid. This method mimics a pendant drop that is subjected to
a gravitational force that is slowly increasing until the solid–liquid
contact area starts to shrink spontaneously. The work of separation
is then calculated in analogy to Tate’s law. The values obtained
for the work of separation are independent of drop size and are in
agreement with Dupré’s theory, showing that they are equal to the work of adhesion.