Journal
ACTA BIOMATERIALIA
Volume 2, Issue 1, Pages 51-58Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2005.08.005
Keywords
wet adhesion; adhesive strength; adhesion energy; scaling; design
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Insects have evolved fibrillar attachment devices based on wet adhesion to attach themselves to a variety of surfaces. This paper investigates the scaling effects of wet adhesion mediated by a liquid bridge between a fiber and a solid surface. The influences of liquid volume and contact angles are discussed via a scaling law indicating that the adhesive strength can be enhanced by contact size reduction. Due to the maximum negative pressure in the liquid bridge, there exists a critical length scale at which the system achieves the theoretical tensile strength of the liquid. We conclude that size reduction down to a critical scale results in optimization of the adhesive strength. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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