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|Type:||Artigo de periódico|
|Title:||Line Tension At High Contact Angle Wetting: Contribution To Interfacial Energy At Long Distances (≫100 Å) From The Triple Line Contour|
de Souza E.F.
|Abstract:||We measured water/air interfacial energy as functions of the finest texture radius of annealed PTFE substrates where air bubbles are anchored. The calculated line tension from measured force vs distance curves for a 7 nm PTFE substrate texture radius is (28 ± 8) × 10-9 N. However, the most surprising aspect is that this effect is not restricted to the triple line vicinity, previously estimated to be ∼100 Å but spreads all over the water/air bubble interface. The proposed method is an alternative to the controversial contact angle measurement for estimating the line tension contribution. © 2007 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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