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Type: Artigo de periódico
Title: Line tension at high contact angle wetting: Contribution to interfacial energy at long distances (> 100 angstrom) from the triple line contour
Author: Teschke, O
de Souza, EF
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) x 10(-9) N. However, the most surprising aspect is that this effect is not restricted to the triple line vicinity, previously estimated to be similar to 100 A 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. (C) 2007 Elsevier B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.cplett.2007.09.043
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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