School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia.
ACS Appl Mater Interfaces. 2020 May 13;12(19):22179-22190. doi: 10.1021/acsami.0c04448. Epub 2020 Apr 29.
Quantitative information on the magnitudes and directions of multiple contacting forces is crucial for a wide range of applications including human-robot interaction, prosthetics, and bionic hands. Herein we report a highly stretchable sensor integrating capacitive and piezoresistive mechanisms that can simultaneously determine multiple forces. The sensor consists of three layers in a sandwich design. The two facesheets serve as both piezoresistive sensors and electrodes for the capacitive sensor, with the core being a porous structure made by using a simple sugar particle template technique to give them high stretchability. The two facesheets contain segregated conductive networks of silver nanowires (AgNWs) and carbon nanofibers (CNFs). By measuring the changes in the electrical resistance of the facesheets and the capacitance between the facesheets, three separate mechanical stimuli can be determined, including normal pressure, in-plane stretch, and transverse shear force. The newly developed multidirectional sensor offers a significant opportunity for the next generation of wearable sensors for human health monitoring and bionic skin for robots.
关于多个接触力的大小和方向的定量信息对于广泛的应用至关重要，包括人机交互、假肢和仿生手。本文报道了一种高度可拉伸的传感器，它集成了电容和压阻机制，可以同时确定多个力。传感器采用三明治设计，由三层组成。两个面皮既是压阻传感器，也是电容传感器的电极，而核心是由简单的糖粒子模板技术制成的多孔结构，赋予其高拉伸性。两个面皮包含银纳米线（AgNWs）和碳纤维（CNFs）的分离导电网络。通过测量面皮电阻和面皮之间电容的变化，可以确定三个独立的机械刺激，包括正压力、面内拉伸和横向剪切力。新开发的多向传感器为下一代用于人体健康监测的可穿戴传感器和用于机器人的仿生皮肤提供了重要机会。
