PubMed:23754440 JSONTXT

{"target":"http://pubannotation.org/docs/sourcedb/PubMed/sourceid/23754440","sourcedb":"PubMed","sourceid":"23754440","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/23754440","text":"Solid surface tension measured by a liquid drop under a solid film.\nWe show that a drop of liquid a few hundred microns in diameter placed under a solid, elastic, thin film (∼10 μm thick) causes it to bulge by tens of microns. The deformed shape is governed by equilibrium of tensions exerted by the various interfaces and the solid film, a form of Neumann's triangle. Unlike Young's equation, which specifies the contact angles at the junction of two fluids and a (rigid) solid, and is fundamentally underdetermined, both tensions in the solid film can be determined here if the liquid-vapor surface tension is known independently. Tensions in the solid film have a contribution from elastic stretch and a constant residual component. The residual component, extracted by extrapolation to films of vanishing thickness and supported by analysis of the elastic deformation, is interpreted as the solid-fluid surface tension, demonstrating that compliant thin-film structures can be used to measure solid surface tensions.","tracks":[{"project":"PubmedHPO","denotations":[{"id":"T1","span":{"begin":466,"end":471},"obj":"HP_0002063"}],"attributes":[{"subj":"T1","pred":"source","obj":"PubmedHPO"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"PubmedHPO","color":"#93d2ec","default":true}]}]}}