School of Chemical Engineering and Materials Science, Chung-Ang University , Seoul 06974, Republic of Korea.
ACS Appl Mater Interfaces. 2017 Oct 18;9(41):36206-36219. doi: 10.1021/acsami.7b11700. Epub 2017 Oct 6.
A new class of simple and highly sensitive piezocapacitive sensors that are capable of detecting static and dynamic pressure changes is reported. The pressure sensor structure is formed by vertically sandwiching a sandpaper-molded carbon nanotube/poly(dimethylsiloxane) composite (CPC) dielectric layer between two ion-gel thin film electrodes. Such a capacitive sensor system enables the distinguishable detection of directional movement of applied pressure as well as static pressure variation by modulating ion distribution in the ion-gel thin films. The resulting capacitive pressure sensors exhibit high sensitivity (9.55 kPa), high durability, and low operating voltage (0.1 V). Our proposed pressure sensors are successfully applied as potential platforms for monitoring human physiological signals and finger sliding motions in order to demonstrate their capability for practical usage. The outstanding sensor performance of the pressure sensors can permit applications in wearable electronic devices for human-machine connecting platforms, health care monitoring systems, and artificial skin.
报道了一种新型的简单且高灵敏度的压电容传感器，能够检测静态和动态压力变化。压力传感器结构由垂直夹在砂纸模压碳纳米管/聚二甲基硅氧烷（CPC）介电层之间的两个离子凝胶薄膜电极形成。这种电容传感器系统通过调节离子凝胶薄膜中的离子分布，能够区分施加压力的定向运动和静态压力变化。所得到的电容压力传感器具有高灵敏度（9.55 kPa）、高耐用性和低工作电压（0.1 V）。我们提出的压力传感器成功地用作监测人体生理信号和手指滑动运动的潜在平台，以证明其实际应用的能力。压力传感器的出色传感器性能可应用于用于人机连接平台的可穿戴电子设备、医疗保健监测系统和人造皮肤。
