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Piezoresistive Electronic-Skin Sensors Produced With Self-Channeling Laser Microstructured Silicon Molds

2021-03-11

 

Author(s): Su, Y (Su, Yue); Zhang, W (Zhang, Wei); Chen, SM (Chen, Shanming); Yao, DW (Yao, Danwen); Zhang, X (Zhang, Xu); Chen, HD (Chen, Hongda); Xu, HL (Xu, Huailiang)

Source: IEEE TRANSACTIONS ON ELECTRON DEVICES Volume: 68 Issue: 2 Pages: 786-792 DOI: 10.1109/TED.2020.3045962 Published: FEB 2021

Abstract: Highly sensitive and cost-effective flexible piezoresistive sensors are pursued as essential components of electronic skin (e-skin) for a variety of applications such as soft robotics and body prosthesis. A common strategy for achieving high sensitivity of these sensors is to fabricate their electrode material with complex 3-D microstructures, but manufacturing cost-effective micro-structured sensors with high reliability and reproducibility is a challenge. Herein, a robust approach for producing high-reproductive microstructured polydimethylsiloxane (PDMS) films composing the sensors is proposed, based on silicon molds with a honeycomb-like architecture fabricated rapidly and cost-effectively at a standoff distance by femtosecond laser pulses in the self-channeling regime. Single-walled carbon nanotubes (SWNTs) are embedded in the micro-structured PDMS films composing sandwich-structural flexible piezoresistive sensors. The sensing devices exhibit good performance with high sensitivity, fast response time, and excellent stability and are used with success for the detection of hand motion pressure and blood pressure at the wrist, thus showing a great potential as components of e-skin for detection of various human motions.

Accession Number: WOS:000612147300051

ISSN: 0018-9383

eISSN: 1557-9646

Full Text: https://ieeexplore.ieee.org/document/9316879



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