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Reference.org
Sessile drop technique
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<p>In <a href="/facts/Materials_science/N5HrXRYW">materials science</a>, the sessile drop technique is a method used for the characterization of solid <a href="/facts/Surface_energy/FYQruNIK">surface energies</a>, and in some cases, aspects of liquid surface energies. The main premise of the method is that by placing a <a href="/facts/Droplet/m4kuGAgH">droplet</a> of <a href="/facts/Liquid/t9GkLWzt">liquid</a> with a known surface energy and <a href="/facts/Contact_angle/dSJcI5KN">contact angle</a>, the surface energy of the solid <a href="/facts/Substrate_(materials_science)/LwwkV6rX">substrate</a> can be calculated. The liquid used for such experiments is referred to as the probe liquid, and the use of several different probe liquids is required. </p>