Skin-inspired flexible and high-performance MXene@polydimethylsiloxane piezoresistive pressure sensor for human motion detection

• Published in: Journal of colloid and interface science Vol. 617; pp. 478 - 488
• Main Authors: Chen, Baodeng, Zhang, Lin, Li, Hongqiang, Lai, Xuejun, Zeng, Xingrong
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2022
• Subjects: abrasives; Dimethylpolysiloxanes; electronic equipment; electronics; heart rate; Human motion detection; Humans; Micro-protrusion structure; Motion; Movement; MXene; Piezoresistive pressure sensor; polydimethylsiloxane; skin (animal); vocalization; Wearable Electronic Devices; Piezoresistive pressure sensor; Micro-protrusion structure; Human motion detection; MXene
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2022.03.013

[Display omitted] •Skin-inspired MXene@PDMS piezoresistive pressure sensor was fabricated.•The sensor with micro-protrusion structure exhibited excellent sensing performance.•The sensor was successfully applied for detecting various human motions.•The sensor integrated device was able to visualize spatial pressure distribution. In recent years, flexible high-performance piezoresistive pressure sensors have attracted considerable attention for the important application potential in the emerging fields of smart robots, wearable electronics and electronic skin. Herein, inspired by human skin, a new strategy was proposed for the fabrication of a double-layer piezoresistive pressure sensor with wide sensing range and high sensitivity. It was based on the utilization of sandpaper as template and MXene for the constructions of micro-protrusion rough surface on polydimethylsiloxane film and electrically conductive pathways, respectively. The prepared sensor demonstrated high sensitivity of 2.6 kPa−1 in wide linear range of 0–30 kPa, fast response/recovery time of 40/40 ms and excellent repeatability. Importantly, the sensor was successfully applied for the real-time detection of radial artery heart rate, limb movement, handwriting and vocal cord vocalization. Moreover, the integrated device by the sensors had the capability of identifying and visualizing spatial pressure distribution. The findings conceivably stand out a new methodology to prepare flexible high-performance piezoresistive pressure sensors for wearable electronics, human-computer interaction, intelligent robots and health monitoring.