High‐Performance Flexible Pressure Sensor Based on Controllable Hierarchical Microstructures by Laser Scribing for Wearable Electronics. Issue 9 (20th June 2021)

• Record Type: Journal Article
• Authors: Du, Qifeng; Liu, Lanlan; Tang, Ruitao; Ai, Jun; Wang, Zhijian; Fu, Qiqi; Li, Chongxiao; Chen, Ying; Feng, Xue
• Is Part Of: Advanced materials technologies. Volume 6:Issue 9(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-20
• Subjects: flexible electronics -- hierarchical microstructure -- laser processing -- pressure sensor -- wearable biomedical device; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202100122
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Flexible pressure sensors are attracting considerable attention due to their potential applications in human health monitoring and human‐machine interfaces. However, it is hard to achieve both high sensitivity and wide linear detection range, and the complicated fabrication process restricts their practical applications. Herein, a simple and scalable fabrication process for a flexible pressure sensor with high sensitivity and wide detection range has been developed by combining the silver nanowires coated, laser‐ablated hierarchical microstructured polydimethylsiloxane, and an interdigital electrode. The hierarchical microstructures contribute to the high sensitivity of 4.48 kPa −1 and increase detection range from 0 to 65 kPa. The increase in the contact area and subsequent additional contact sites of the hierarchical microstructures lead to the high‐performance. Arterial pulse, breathing, and static tremors have been measured by attaching the device to the human body. Moreover, a pressure sensor array has been fabricated to illustrate the scalability of this strategy. The results demonstrate that the flexible pressure sensor with simple and scalable fabrication capability has promising applications in wearable electronic skins. Abstract : The proposed flexible pressure sensor attached to the human body to measure physiological parameters is presented. It is mainly composed of printed electrodes and laser scribed hierarchical microstructures. The simple and scalable fabrication technology has promising applications in wearable biomedical and electronic skins.