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Switchable Adhesion Surfaces with Enhanced Performance Against Rough Counterfaces

1
Department of Engineering, University of Cambridge, Trumpington Street, Cambrige CB2 1PZ, UK
2
Robinson College, University of Cambridge, Cambridge CB3 9AN, UK
*
Author to whom correspondence should be addressed.
Present address: INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany; Tel.: +49-0-681-9300-366.
Academic Editor: Giuseppe Carbone
Biomimetics 2016, 1(1), 2; https://doi.org/10.3390/biomimetics1010002
Received: 7 December 2015 / Accepted: 18 February 2016 / Published: 25 February 2016
(This article belongs to the Special Issue Micro- and Nano-Structured Bio-Inspired Surfaces)
In a recent study, we demonstrated that the pressurization of micro-fluidic features introduced in the subsurface of a soft polymer can be used to actively modify the magnitude of the adhesion to a harder counterface by changing its waviness or long wavelength undulations. In that case, both contacting surfaces had very smooth finishes with root-mean-square roughnesses of less than 20 nm. These values are far from those of many engineering surfaces, which usually have a naturally occurring roughness of between ten and a hundred times this value. In this work, we demonstrate that appropriate surface features, specifically relatively slender “fibrils”, can enhance the ability of a such a soft surface to adhere to a hard, but macroscopically rough, counterface, while still maintaining the possibility of switching the adhesion force from one level to another. Conversely, stiffer more conical surface features can suppress adhesion even against a smooth counterface. Examples of each form of topography can be found in the natural world. View Full-Text
Keywords: switchable adhesion; soft adhesion; microfluidics; roughness switchable adhesion; soft adhesion; microfluidics; roughness
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MDPI and ACS Style

Prieto-López, L.O.; Williams, J.A. Switchable Adhesion Surfaces with Enhanced Performance Against Rough Counterfaces. Biomimetics 2016, 1, 2. https://doi.org/10.3390/biomimetics1010002

AMA Style

Prieto-López LO, Williams JA. Switchable Adhesion Surfaces with Enhanced Performance Against Rough Counterfaces. Biomimetics. 2016; 1(1):2. https://doi.org/10.3390/biomimetics1010002

Chicago/Turabian Style

Prieto-López, Lizbeth O.; Williams, John A. 2016. "Switchable Adhesion Surfaces with Enhanced Performance Against Rough Counterfaces" Biomimetics 1, no. 1: 2. https://doi.org/10.3390/biomimetics1010002

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