Yao Shanshan, Zhu Yong
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA.
Nanoscale. 2014 Feb 21;6(4):2345-52. doi: 10.1039/c3nr05496a. Epub 2014 Jan 15.
Considerable efforts have been made to achieve highly sensitive and wearable sensors that can simultaneously detect multiple stimuli such as stretch, pressure, temperature or touch. Here we develop highly stretchable multifunctional sensors that can detect strain (up to 50%), pressure (up to ∼1.2 MPa) and finger touch with high sensitivity, fast response time (∼40 ms) and good pressure mapping function. The reported sensors utilize the capacitive sensing mechanism, where silver nanowires are used as electrodes (conductors) and Ecoflex is used as a dielectric. The silver nanowire electrodes are screen printed. Our sensors have been demonstrated for several wearable applications including monitoring thumb movement, sensing the strain of the knee joint in patellar reflex (knee-jerk) and other human motions such as walking, running and jumping from squatting, illustrating the potential utilities of such sensors in robotic systems, prosthetics, healthcare and flexible touch panels.
人们付出了巨大努力来实现能够同时检测多种刺激（如拉伸、压力、温度或触摸）的高灵敏度可穿戴传感器。在此，我们开发了高度可拉伸的多功能传感器，它能够以高灵敏度、快速响应时间（约40毫秒）和良好的压力映射功能检测应变（高达50%）、压力（高达约1.2兆帕）和手指触摸。所报道的传感器利用电容传感机制，其中银纳米线用作电极（导体），Ecoflex用作电介质。银纳米线电极通过丝网印刷制成。我们的传感器已在多种可穿戴应用中得到展示，包括监测拇指运动、感知髌反射（膝跳反射）中膝关节的应变以及其他人体运动，如行走、跑步和从蹲姿跳跃，这说明了此类传感器在机器人系统、假肢、医疗保健和柔性触摸面板中的潜在用途。
