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Elastomeric transparent capacitive sensors based on an interpenetrating composite of silver nanowires and polyurethane

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4 Author(s)
Hu, Weili ; Department of Materials Science and Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, California 90095, USA ; Niu, Xiaofan ; Zhao, Ran ; Pei, Qibing

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Highly flexible transparent capacitive sensors have been demonstrated for the detection of deformation and pressure. The elastomeric sensors employ a pair of compliant electrodes comprising silver nanowire networks embedded in the surface layer of polyurethane matrix, and a highly compliant dielectric spacer sandwiched between the electrodes. The capacitance of the sensor sheets increases linearly with strains up to 60% during uniaxial stretching, and linearly with externally applied transverse pressure from 1 MPa down to 1 kPa. Stretchable sensor arrays consisting of 10 × 10 pixels have also been fabricated by patterning the composite electrodes into X-Y addressable passive matrix.

Published in:

Applied Physics Letters  (Volume:102 ,  Issue: 8 )