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  Slip-mediated dewetting of polymer microdroplets.

McGraw, J. D., Chan, T. S., Maurer, S., Salez, T., Benzaquen, M., Raphaël, E., et al. (2016). Slip-mediated dewetting of polymer microdroplets. Proceedings of the National Academy of Sciences of the United States of America, 113(5), 1168-1173. doi:10.1073/pnas.1513565113.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-BBA4-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-18C0-B
Genre: Journal Article

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http://www.pnas.org/content/113/5/1168.full (Publisher version)
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 Creators:
McGraw, Joshua D., Author
Chan, Tak Shing1, Author              
Maurer, Simon, Author
Salez, Thomas, Author
Benzaquen, Michael, Author
Raphaël, Elie, Author
Brinkmann, Martin1, Author              
Jacobs, Karin, Author
Affiliations:
1Group 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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Free keywords: Slip contact; Line motion; Free-surface flows; Microflows; Nanoflows
 Abstract: Classical hydrodynamic models predict that infinite work is required to move a three-phase contact line, defined here as the line where a liquid/vapor interface intersects a solid surface. Assuming a slip boundary condition, in which the liquid slides against the solid, such an unphysical prediction is avoided. In this article, we present the results of experiments in which a contact line moves and where slip is a dominating and controllable factor. Spherical cap-shaped polystyrene microdroplets, with nonequilibrium contact angle, are placed on solid self-assembled monolayer coatings from which they dewet. The relaxation is monitored using in situ atomic force microscopy. We find that slip has a strong influence on the droplet evolutions, both on the transient nonspherical shapes and contact line dynamics. The observations are in agreement with scaling analysis and boundary element numerical integration of the governing Stokes equations, including a Navier slip boundary condition.

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Language(s): eng - English
 Dates: 2016-01-192016
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1073/pnas.1513565113
 Degree: -

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Title: Proceedings of the National Academy of Sciences of the United States of America
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 113 (5) Sequence Number: - Start / End Page: 1168 - 1173 Identifier: ISSN: 0027-8424