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  Switching Liquid Morphologies on Linear Grooves

Khare, K., Herminghaus, S., Baret, J.-C., Law, B. M., Brinkmann, M., & Seemann, R. (2007). Switching Liquid Morphologies on Linear Grooves. Langmuir, 23(26), 12997-13006. doi:10.1021/la701899u.

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Khare, Krishnacharya1, Autor           
Herminghaus, Stephan2, Autor           
Baret, Jean-Christophe3, Autor           
Law, Bruce M., Autor
Brinkmann, Martin4, Autor           
Seemann, Ralf1, Autor           
Affiliations:
1Group Geometry of Fluid Interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063311              
2Group Granular matter and irreversibility, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063306              
3Group Micro- and nanostructures in two-phase fluids, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063302              
4Group Theory of wet random assemblies, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063303              

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 Zusammenfassung: The morphology of liquids confined to linear micrometer-sized grooves of triangular and rectangular cross section is studied for different substrate wettabilities. Depending on the wettability and exact geometry, either droplike morphologies or elongated liquid filaments represent the generic equilibrium structures on the substrate. Upon changing the apparent contact angle of aqueous drops by electrowetting, we are able to trigger the transition between elongated filaments and droplets. In the case of rectangular grooves, this transition allows us to advance liquid reversibly into the grooves while crossing a certain threshold contact angle. In triangular grooves, however, these elongated filaments undergo a dynamic instability when the contact angle returns to a value above the filling threshold. The different filling and drainage behavior is explained by specific aspects of the triangular and rectangular groove geometry.

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Sprache(n): eng - English
 Datum: 2007-11-15
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 340451
DOI: 10.1021/la701899u
 Art des Abschluß: -

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Titel: Langmuir
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 23 (26) Artikelnummer: - Start- / Endseite: 12997 - 13006 Identifikator: -