期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 4, 页码 4086-4094出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16611
关键词
highly sensitive; bioinspired; e-skin; healthcare monitoring; phonation rehabilitation
资金
- City University of Hong Kong's Research Grant Project [9667145]
- RGC of Hong Kong Project [T42-103/16]
- Young Innovative Talents Project of the Department of Education of Guangdong Province [2015KQNCX141]
Piezoresistive microsensors are considered to be essential components of the future wearable electronic devices. However, the expensive cost, complex fabrication technology, poor stability, and low yield have limited their developments for practical applications. Here, we present a cost-effective, relatively simple, and high-yield fabrication approach to construct highly sensitive and ultrastable piezoresistive sensors using a bioinspired hierarchically structured graphite/polydimethylsiloxane composite as the active layer. In this fabrication, a commercially available sandpaper is employed as the mold to develop the hierarchical structure. Our devices exhibit fascinating performance including an ultrahigh sensitivity (64.3 kPa(-1)), fast response time (<8 ms), low limit of detection of 0.9 Pa, long-term durability (>100 000 cycles), and high ambient stability (>1 year). The applications of these devices in sensing radial artery pulses, acoustic vibrations, and human body motion are demonstrated, exhibiting their enormous potential use in real-time healthcare monitoring and robotic tactile sensing.
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