Graphene Mesh for Self-Sensing Ionic Soft Actuator Inspired from Mechanoreceptors in Human Body

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Here, inspired by mechanoreceptors in the human body, a self-sensing ionic soft actuator is developed that precisely senses the bending motions during actuating utilizing a 3D graphene mesh electrode. The graphene mesh electrode has the permeability of mobile ions inside the ionic exchangeable polymer and shows low electrical resistance of 6.25 omega Sq(-1), maintaining high electrical conductivity in large bending deformations of 180 degrees. In this sensing system, the graphene woven mesh is embedded inside ionic polymer membrane to interact with mobile ions and to trace their movements. The migration of mobile ions inside the membrane induces an electrical signal on the mesh and provides the information regarding ion distribution, which is proven to be highly correlated with the bending deformation of the actuator. Using this integrated self-sensing system, the responses of an ionic actuator to various input stimulations are precisely estimated for both direct current and alternating current inputs. Even though the generated displacement is extremely small around 300 mu m at very low driving voltage of 0.1 V, high level accuracy (96%) of estimated deformations could be achieved using the self-sensing actuator system.
Publisher
WILEY
Issue Date
2019-12
Language
English
Article Type
Article
Citation

ADVANCED SCIENCE, v.6, no.23, pp.1901711

ISSN
2198-3844
DOI
10.1002/advs.201901711
URI
http://hdl.handle.net/10203/270015
Appears in Collection
ME-Journal Papers(저널논문)
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