Please use this identifier to cite or link to this item: doi:10.22028/D291-29453
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Title: Composite Pillars with a Tunable Interface for Adhesion to Rough Substrates
Author(s): Fischer, Sarah C. L.
Arzt, Eduard
Hensel, René
Language: English
Title: ACS Applied Materials & Interfaces
Volume: 9
Issue: 1
Startpage: 1036
Endpage: 1044
Publisher/Platform: American Chemical Society (ACS)
Year of Publication: 2017
Publikation type: Journal Article
Abstract: The benefits of synthetic fibrillar dry adhesives for temporary and reversible attachment to hard objects with smooth surfaces have been successfully demonstrated in previous studies. However, surface roughness induces a dramatic reduction in pull-off stresses and necessarily requires revised design concepts. Toward this aim, we introduce cylindrical two-phase single pillars, which are composed of a mechanically stiff stalk and a soft tip layer. Adhesion to smooth and rough substrates is shown to exceed that of conventional pillar structures. The adhesion characteristics can be tuned by varying the thickness of the soft tip layer, the ratio of the Young's moduli and the curvature of the interface between the two phases. For rough substrates, adhesion values similar to those obtained on smooth substrates were achieved. Our concept of composite pillars overcomes current practical limitations caused by surface roughness and opens up fields of application where roughness is omnipresent.
DOI of the first publication: 10.1021/acsami.6b11642
Link to this record: hdl:20.500.11880/28142
http://dx.doi.org/10.22028/D291-29453
ISSN: 1944-8244
1944-8252
Date of registration: 21-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Eduard Arzt
Collections:UniBib – Die Universitätsbibliographie

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