▎ 摘　　要

Flexible and wearable pressure sensors are attracting a considerable interest for the essential requirements of personalized health monitoring and electronic skin in next-generation electronics. However, reliable and cost-effective preparation of high-performance pressure sensors remains a challenge. Herein, a novel flexible asymmetric pressure sensor composed of multi-walled carbon nanotubes (MWCNTs) and laser-induced graphene (LIG) has been developed. The key resistance sensitive material of MWCNTsembedded LIG (MWCNTs/LIG) with an interconnected hierarchical microstructure is fabricated by a simple, convenient and efficient laser direct writing (LDW) technique. By virtue of this designed threedimensional crosslinked structure, MWCNTs/LIG hybrid endows the asymmetric pressure sensor with combined excellent characteristics of a high sensitivity (2.41 kPa(-1)), prominent detectable limit (about 1.2 Pa), very responsive recovery (2 ms), and remarkable durability (>2 000 cycles). This high-performance MWCNTs/LIG asymmetric pressure sensor can clearly detect various subtle human motions (such as breath, vocal vibration, finger movement, and wrist pulse) in real time. Moreover, the integrated MWCNTs/LIG sensory array has a very good multi-point recognition capability. Benefit from its outstanding sensing performances, the as-fabricated pressure sensor has vital inspiration for widespread practical applications in human monitoring of physiological activities, electronic skin, and other wearable fields. (C) 2021 Elsevier B.V. All rights reserved.