Please use this identifier to cite or link to this item: doi:10.22028/D291-28874
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Title: Signatures of slip in dewetting polymer films
Author(s): Peschka, Dirk
Haefner, Sabrina
Marquant, Ludovic
Jacobs, Karin
Münch, Andreas
Wagner, Barbara
Language: English
Title: Proceedings of the National Academy of Sciences of the United States of America
Volume: 116
Issue: 19
Startpage: 9275
Endpage: 9284
Publisher/Platform: National Academy of Sciences
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Thin polymer films on hydrophobic substrates are susceptible to rupture and hole formation. This, in turn, initiates a complex dewetting process, which ultimately leads to characteristic droplet patterns. Experimental and theoretical studies suggest that the type of droplet pattern depends on the specific interfacial condition between the polymer and the substrate. Predicting the morphological evolution over long timescales and on the different length scales involved is a major computational challenge. In this study, a highly adaptive numerical scheme is presented, which allows for following the dewetting process deep into the nonlinear regime of the model equations and captures the complex dynamics, including the shedding of droplets. In addition, our numerical results predict the previously unknown shedding of satellite droplets during the destabilization of liquid ridges that form during the late stages of the dewetting process. While the formation of satellite droplets is well known in the context of elongating fluid filaments and jets, we show here that, for dewetting liquid ridges, this property can be dramatically altered by the interfacial condition between polymer and substrate, namely slip. This work shows how dissipative processes can be used to systematically tune the formation of patterns.
DOI of the first publication: 10.1073/pnas.1820487116
Link to this record: hdl:20.500.11880/27757
ISSN: 0027-8424
Date of registration: 13-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Prof. Dr. Karin Jacobs
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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