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The Effect of Patterned Micro-Structure on the Apparent Contact Angle and Three-Dimensional Contact Line

Foltyn, Patrick; Restle, Ferdinand; Wissmann, Markus; Hengsbach, Stefan; Weigand, Bernhard

Abstract:
The measurement of the apparent contact angle on structured surfaces is much more difficult to obtain than on smooth surfaces because the pinning of liquid to the roughness has a tremendous influence on the three phase contact line. The results presented here clearly show an apparent contact angle variation along the three phase contact line. Accordingly, not only one value for the apparent contact angle can be provided, but a contact angle distribution or an interval has to be given to characterize the wetting behavior. For measuring the apparent contact angle distribution on regularly structured surfaces, namely micrometric pillars and grooves, an experimental approach is presented and the results are provided. A short introduction into the manufacturing process of such structured surfaces, which is a combination of Direct LASER Writing (DLW) lithography, electroforming and hot embossing shows the high quality standard of the used surfaces.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130033
Veröffentlicht am 26.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2311-5521
KITopen-ID: 1000130033
HGF-Programm 43.35.01 (POF IV, LK 01) Platform for Correlative, In Situ & Operando Charakterizat.
Erschienen in Fluids
Verlag MDPI
Band 6
Heft 2
Seiten Article: 92
Vorab online veröffentlicht am 23.02.2021
Schlagwörter KNMF proposal 2016-017-016369: DLW, HE
Nachgewiesen in Dimensions
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