TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Xue, Longjian
A1  - Sanz, Belén
A1  - Luo, Aoyi
A1  - Turner, Kevin T.
A1  - Wang, Xin
A1  - Tan, Di
A1  - Zhang, Rui
A1  - Du, Hang
A1  - Steinhart, Martin
A1  - Mijangos, Carmen
A1  - Guttmann, Markus
A1  - Kappl, Michael
A1  - del Campo Bécares, Aránzazu
T1  - Hybrid Surface Patterns Mimicking the Design of the Adhesive Toe Pad of Tree Frog
JF  - ACS Nano
N2  - 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.
Y1  - 2017
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-4976
SN  - 1936-0851
SS  - 1936-0851
U6  - https://doi.org/10.1021/acsnano.7b04994
DO  - https://doi.org/10.1021/acsnano.7b04994
VL  - 11
IS  - 10
SP  - 9711
EP  - 9719
ER  -