Please use this identifier to cite or link to this item: doi:10.22028/D291-29489
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Title: Hybrid Surface Patterns Mimicking the Design of the Adhesive Toe Pad of Tree Frog
Author(s): Xue, Longjian
Sanz, Belén
Luo, Aoyi
Turner, Kevin T.
Wang, Xin
Tan, Di
Zhang, Rui
Du, Hang
Steinhart, Martin
Mijangos, Carmen
Guttmann, Markus
Kappl, Michael
del Campo Bécares, Aránzazu
Language: English
Title: ACS nano
Volume: 11
Issue: 10
Startpage: 9711
Endpage: 9719
Publisher/Platform: ACS
Year of Publication: 2017
Publikation type: Journal Article
Abstract: Biological materials achieve directional reinforcement with oriented assemblies of anisotropic building blocks. One such example is the nanocomposite structure of keratinized epithelium on the toe pad of tree frogs, in which hexagonal arrays of (soft) epithelial cells are crossed by densely packed and oriented (hard) keratin nanofibrils. Here, a method is established to fabricate arrays of tree-frog-inspired composite micropatterns composed of polydimethylsiloxane (PDMS) micropillars embedded with polystyrene (PS) nanopillars. Adhesive and frictional studies of these synthetic materials reveal a benefit of the hierarchical and anisotropic design for both adhesion and friction, in particular, at high matrix-fiber interfacial strengths. The presence of PS nanopillars alters the stress distribution at the contact interface of micropillars and therefore enhances the adhesion and friction of the composite micropattern. The results suggest a design principle for bioinspired structural adhesives, especially for wet environments.
DOI of the first publication: 10.1021/acsnano.7b04994
URL of the first publication:
Link to this record: hdl:20.500.11880/28222
ISSN: 1936-086X
Date of registration: 26-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Professorship: NT - Prof. Dr. Aránzazu del Campo
Collections:UniBib – Die Universitätsbibliographie

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