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Fibrillar elastomeric micropatterns create tunable adhesion even to rough surfaces

  • 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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Document Type:Article
Author:Viktoriia Barreau, René HenselORCiD, Nathalie K. Guimard, Animangsu Ghatak, Robert M. McMeekingORCiD, Eduard ArztORCiD
Parent Title (English):Advanced Functional Materials
First Page:4687
Last Page:4694
Year of first Publication:2016
Release Date:2022/11/18
Tag:adhesion; fibrillar dry adhesives; gecko-inspired; surface roughness
Impact:12.120 (2016)
Funding Information:SPP 1420 of the German Science Foundation DFG; European Research Council. Grant Number: 340929
Scientific Units:Functional Microstructures
Open Access:Open Access
Signature:INM 2016/060
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International