Three-Dimensional Continuous Conductive Nanostructure for Highly Sensitive and Stretchable Strain Sensor

The demand for wearable strain gauges that can detect dynamic human motions is growing in the area of healthcare technology. However, the realization of efficient sensing materials for effective detection of human motions in daily life is technically challenging due to the absence of the optimally designed electrode. Here, we propose a novel concept for overcoming the intrinsic limits of conventional strain sensors based on planar electrodes by developing highly periodic and three-dimensional (3D) bicontinuous nanoporous electrodes. We create a 3D bicontinuous nanoporous electrode by constructing conductive percolation networks along the surface of porous 3D nanostructured poly(dimethylsiloxane) with single-walled carbon nanotubes. The 3D structural platform allows fabrication of a strain sensor with robust properties such as a gauge factor of up to 134 at a tensile strain of 40%, a widened detection range of up to 160%, and a cyclic property of over 1000 cycles. Collectively, this study provides new design opportunities for a highly efficient sensing system that finely captures human motions, including phonations and joint movements.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-05
Language
English
Keywords

HUMAN-MOTION DETECTION; ELECTRICAL-CONDUCTIVITY; CARBON NANOTUBES; PHASE MASKS; WEARABLE ELECTRONICS; RUBBER COMPOSITES; LARGE-AREA; 3D; GRAPHENE; TRANSPARENT

Citation

ACS APPLIED MATERIALS INTERFACES, v.9, no.20, pp.17370 - 17379

ISSN
1944-8244
DOI
10.1021/acsami.7b03052
URI
http://hdl.handle.net/10203/224547
Appears in Collection
ME-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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