Fibrillar Elastomeric Micropatterns Create Tunable Adhesion Even to Rough Surfaces

Viktoriia Barreau; René Hensel; Nathalie K. Guimard; Animangsu Ghatak; Robert M. Mcmeeking; Eduard Arzt

doi:10.1002/adfm.201600652

Fibrillar Elastomeric Micropatterns Create Tunable Adhesion Even to Rough Surfaces

Viktoriia Barreau, René Hensel, Nathalie K. Guimard, Animangsu Ghatak, Robert M. Mcmeeking, Eduard Arzt^*

^*Corresponding author for this work

Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

Biologically inspired, fibrillar dry adhesives continue to attract much attention as they are instrumental for emerging applications and technologies. To date, the adhesion of micropatterned gecko-inspired surfaces has predominantly been tested on stiff, smooth substrates. However, all natural and almost all artificial surfaces have roughnesses on one or more different length scales. In the present approach, micropillar-patterned PDMS surfaces with superior adhesion to glass substrates with different roughnesses are designed and analyzed. The results reveal for the first time adhesive and nonadhesive states depending on the micropillar geometry relative to the surface roughness profile. The data obtained further demonstrate that, in the adhesive regime, fibrillar gecko-inspired adhesive structures can be used with advantage on rough surfaces; this finding may open up new applications in the fields of robotics, biomedicine, and space exploration.

Original language	English
Pages (from-to)	4687-4694
Number of pages	8
Journal	Advanced Functional Materials
Volume	26
Issue number	26
Early online date	9 May 2016
DOIs	https://doi.org/10.1002/adfm.201600652
Publication status	Published - 12 Jul 2016

Bibliographical note

Acknowledgements
V.B., N.K.G., and E.A. contributed with conception and experimental design. V.B. performed the experiments. V.B., R.H., A.G., and R.M.M. carried out analysis and interpretation of data. V.B., R.H., A.G., and E.A. wrote the manuscript. V.B. and R.H. contributed equally to this work. V.B. acknowledges funding by SPP 1420 of the German Science Foundation DFG. E.A., N.K.G., and R.H. acknowledge funding from the European Research Council under the European Union/ERC Advanced Grant “Switch2Stick,” Agreement No. 340929.

Keywords

Adhesion
Fibrillar dry adhesives
Gecko-inspired
Surface roughness

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10.1002/adfm.201600652Licence: CC BY-NC

Fibrillar Elastomeric Micropatterns Create Tunable Adhesion Even to Rough Surfaces
© 2016 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. https://creativecommons.org/licenses/by-nc/4.0/
Final published version, 3.65 MBLicence: CC BY-NC

Cite this

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abstract = "Biologically inspired, fibrillar dry adhesives continue to attract much attention as they are instrumental for emerging applications and technologies. To date, the adhesion of micropatterned gecko-inspired surfaces has predominantly been tested on stiff, smooth substrates. However, all natural and almost all artificial surfaces have roughnesses on one or more different length scales. In the present approach, micropillar-patterned PDMS surfaces with superior adhesion to glass substrates with different roughnesses are designed and analyzed. The results reveal for the first time adhesive and nonadhesive states depending on the micropillar geometry relative to the surface roughness profile. The data obtained further demonstrate that, in the adhesive regime, fibrillar gecko-inspired adhesive structures can be used with advantage on rough surfaces; this finding may open up new applications in the fields of robotics, biomedicine, and space exploration.",

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N2 - Biologically inspired, fibrillar dry adhesives continue to attract much attention as they are instrumental for emerging applications and technologies. To date, the adhesion of micropatterned gecko-inspired surfaces has predominantly been tested on stiff, smooth substrates. However, all natural and almost all artificial surfaces have roughnesses on one or more different length scales. In the present approach, micropillar-patterned PDMS surfaces with superior adhesion to glass substrates with different roughnesses are designed and analyzed. The results reveal for the first time adhesive and nonadhesive states depending on the micropillar geometry relative to the surface roughness profile. The data obtained further demonstrate that, in the adhesive regime, fibrillar gecko-inspired adhesive structures can be used with advantage on rough surfaces; this finding may open up new applications in the fields of robotics, biomedicine, and space exploration.

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Fibrillar Elastomeric Micropatterns Create Tunable Adhesion Even to Rough Surfaces

Abstract

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Keywords

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