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Hollow MXene Sphere/Reduced Graphene Aerogel Composites for Piezoresistive Sensor with Ultra‐High Sensitivity
Author(s) -
Zhu Meng,
Yue Yang,
Cheng Yongfa,
Zhang Yanan,
Su Jun,
Long Fei,
Jiang Xueliang,
Ma Yanan,
Gao Yihua
Publication year - 2020
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201901064
Subject(s) - materials science , aerogel , piezoresistive effect , graphene , pressure sensor , gauge factor , composite number , composite material , electrode , durability , optoelectronics , sensitivity (control systems) , nanotechnology , electronic engineering , mechanical engineering , fabrication , medicine , chemistry , alternative medicine , pathology , engineering
Pressure sensing is key to smart wearable electronics and human–machine interaction interfaces. To achieve a high‐performance pressure sensor that has broad linear range and is capable of detecting subtle changes of pressure, the good choice of sensing materials and rational design of structures are both needed. A novel piezoresistive sensor based on hollow MXene spheres/reduced graphene composite aerogel and flexible interdigital electrodes is presented. Benefiting from the unique microstructure of the composite aerogel, the prepared pressure sensor exhibits high sensitivity (609 kPa −1 in the range of 6.4–10 kPa), broad linear range (0–10 kPa), low detection limit (6 Pa), short response time (232 ms), and good durability (6000 cycles). Moreover, the device is able to monitor various human activities in real time, as well as distinguish tiny differences of grain. The potential application of mapping the location and intensity of the pressures is also explored.