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  Dewetting of Liquid Filaments in Wedge-Shaped Grooves

Khare, K., Brinkmann, M., Law, B. M., Gurevich, E. L., Herminghaus, S., & Seemann, R. (2007). Dewetting of Liquid Filaments in Wedge-Shaped Grooves. Langmuir, 23(24), 12138-12141. doi:10.1021/la701515u.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-13F5-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-13F6-B
Genre: Journal Article

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 Creators:
Khare, Krishnacharya1, Author              
Brinkmann, Martin2, Author              
Law, Bruce M., Author
Gurevich, Evgeny L.1, Author              
Herminghaus, Stephan3, Author              
Seemann, Ralf1, Author              
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 Theory of wet random assemblies, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063303              
3Group Granular matter and irreversibility, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063306              

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 Abstract: The dewetting of liquid filaments in linear grooves of a triangular cross section is studied experimentally and theoretically. Homogeneous filaments of glassy polystyrene (PS) are prepared in triangular grooves in a nonequilibrium state. At elevated temperatures, the molten PS restores its material contact angle with the substrate. Liquid filaments with a convex liquid-vapor interface decay into isolated droplets with a characteristic spacing depending on the wedge geometry, wettability, and filament width. This instability is driven by the interplay of local filament width and Laplace pressure and constitutes a wide class of 1D instabilities that also include the Rayleigh-Plateau instability as a special case. Our results show an accurately exponential buildup of the instability, suggesting that fluctuations have a minor influence in our system.

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Language(s): eng - English
 Dates: 2007-10-26
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 339935
DOI: 10.1021/la701515u
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Title: Langmuir
Source Genre: Journal
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Pages: - Volume / Issue: 23 (24) Sequence Number: - Start / End Page: 12138 - 12141 Identifier: -