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ACS Appl Mater Interfaces. 2009 Apr;1(4):849-55. doi: 10.1021/am8002439.

Enhanced adhesion by gecko-inspired hierarchical fibrillar adhesives.

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1
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213-3890, USA. mikemurphy@cmu.edu

Abstract

The complex structures that allow geckos to repeatably adhere to surfaces consist of multilevel branching fibers with specialized tips. We present a novel technique for fabricating similar multilevel structures from polymer materials and demonstrate the fabrication of arrays of two- and three-level structures, wherein each level terminates in flat mushroom-type tips. Adhesion experiments are conducted on two-level fiber arrays on a 12-mm-diameter glass hemisphere, which exhibit both increased adhesion and interface toughness over one-level fiber samples and unstructured control samples. These adhesion enhancements are the result of increased surface conformation as well as increased extension during detachment.

PMID:
20356011
DOI:
10.1021/am8002439
[Indexed for MEDLINE]
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