Transparent, Flexible Strain Sensor Based on a Solution-Processed Carbon Nanotube Network

The demands for transparent, flexible electronic devices are continuously increasing due to their potential applications to the human body. In particular, skin-like, transparent, flexible strain sensors have been developed to realize multifunctional human-machine interfaces. Here, we report a sandwich-like structured strain sensor with excellent optical transparency based on highly purified, solution-processed, 99% metallic CNT-polydimethylsiloxane (PDMS) composite thin films. Our CNT-PDMS composite strain sensors are mechanically compliant, physically robust, and easily fabricated. The fabricated strain sensors exhibit a high optical transparency of over 92% in the visible range with acceptable sensing performances in terms of sensitivity, hysteresis, linearity, and drift. We also found that the sensitivity and linearity of the strain sensors can be controlled by the number of CNT sprays; hence, our sensor can be applied and controlled based on the need of individual applications. Finally, we investigated the detections of human activities and emotions by mounting our transparent strain sensor on various spots of human skins.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-08
Language
English
Keywords

HUMAN-MOTION DETECTION; THIN-FILM; OPTOELECTRONICS; ELECTRONICS; ELASTOMERS; CONDUCTORS

Citation

ACS APPLIED MATERIALS & INTERFACES, v.9, no.31, pp.26279 - 26285

ISSN
1944-8244
DOI
10.1021/acsami.7b03184
URI
http://hdl.handle.net/10203/225822
Appears in Collection
ME-Journal Papers(저널논문)
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