Low voltage switching of crease patterns on gel surfaces with topographically patterned microelectrodes

Xu, Ben and Hayward, Ryan (2013) Low voltage switching of crease patterns on gel surfaces with topographically patterned microelectrodes. In: APS March Meeting 2013, 18-23 March 2013, Baltimore, USA.

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Abstract

Exercising precise control over surface instability patterns on soft hydrogels is of significant interest for applications in biological and biomedical contexts. Here, we show that patterns of surface creases can be successfully programmed on thin hydrogel layers by applying a direct current electric voltage to underlying micro-patterned electrodes. We characterize the dependence of the critical switching voltage on the swelling of the gel layer and the geometry of the electrode array, as well as the depth of creases as a function of applied voltage and the switching kinetics. We also show that introducing topographically structured electrodes lowers the critical voltage slightly, and provides better control over crease shape. To better understand the mechanism of electrically-triggered creasing, we have developed an in situ strain mapping technique based on bleaching of markers within the gel layer.

Item Type: Conference or Workshop Item (Speech)
Subjects: F200 Materials Science
F300 Physics
H300 Mechanical Engineering
H900 Others in Engineering
J400 Polymers and Textiles
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Related URLs:
Depositing User: Bin Xu
Date Deposited: 06 Jun 2013 14:56
Last Modified: 10 Aug 2015 11:09
URI: http://nrl.northumbria.ac.uk/id/eprint/12797

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