摘要
Wearable pressure sensors have drawn significant attention because of their extensive applications in motion detection, tactile sensing, and health monitoring. However, the complex manufacturing process and high cost of active materials make low-cost,large-scale production elusive. In this work, we report a flexible piezoresistive pressure sensor assembled with two 3D laserinduced graphene(LIG) foam electrodes on a polyimide thin film from a simple laser scribing process in the ambient environment. The design of the air gap between the two foam electrodes allows the sensor to showcase a low limit of detection of 0.274 Pa, which provides favorable sensing performance in motion detection and wrist pulse monitoring. The addition of spherical MoS2 nanoparticles between the two foam electrodes further enhances the sensitivity to 88 k Pa-1 and increases the sensing range to significantly outperform the previous literature reports. The demonstrated LIG pressure sensors also exhibit fast response/recovery rates and excellent durability/repeatability.
基金
support from the Joint Doctoral Training Foundation of HEBUT
supports from the National Natural Science Foundation of China(Grant No.ECCS-1933072)
the National Heart,Lung,and Blood Institute of the National Institutes of Health(Grant No.R61HL154215)
the Penn State University(Center for Security Research and Education,Center for Biodevices,and College of Engineering Multidisciplinary Seed Grants)。
