材料科学
纤维
压力传感器
电容
复合材料
复合数
光纤
电容感应
导电体
光电子学
电极
光学
电气工程
热力学
物理
工程类
物理化学
化学
作者
Fangyi Guan,Yu Xie,Hanxiang Wu,Yuan Meng,Ye Shi,Meng Gao,Ziyang Zhang,Shiyan Chen,Ye Chen,Huaping Wang,Qibing Pei
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-10-08
卷期号:14 (11): 15428-15439
被引量:154
标识
DOI:10.1021/acsnano.0c06063
摘要
Fiber-based sensors are desirable to provide an immersive experience for users in the human–computer interface. We report a hierarchically porous silver nanowire-bacterial cellulose fiber that can be utilized for sensitive detection of both pressure and proximity of human fingers. The conductive fiber was synthesized via continuous wet-spinning at a speed of 20 m/min, with a diameter of 53 μm, the electrical conductivity of 1.3 × 104 S/cm, a tensile strength of 198 MPa, and elongation strain of 3.0% at break. The fibers were coaxially coated with a 10 μm thick poly(dimethylsiloxane) dielectric elastomer to form the fiber sensor element which is thinner than a human hair. Two of the sensor fibers were laid diagonally, and the capacitance changes between the conductive cores were measured in response to pressure and proximity. In the touch mode, a fiber-based sensor experienced monotonic capacitance increase in the pressure range from 0 to 460 kPa, and a linear response with a high sensitivity of 5.49 kPa–1 was obtained in the low-pressure regime (<0.5 kPa). In touchless mode, the sensor is highly sensitive to objects at a distance of up to 30 cm. Also, the fiber can be easily stitched into garments as comfortable and fashionable sensors to detect heartbeat and vocal pulses. A fiber sensor array is able to serve as a touchless piano to play music and accurately determine the proximity of an object. A 2 × 2 array was further shown for two- and three-dimensional location detection of remote objects.
科研通智能强力驱动
Strongly Powered by AbleSci AI