He Xin, He Xiang, He Houlong, Liang Shunli, Liu Zhihao, Liang Jionghong, Xin Yue, Yang Weijia, Chen Yan, Zhang Chi
School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, P. R. China.
ACS Omega. 2021 Oct 5;6(41):27208-27215. doi: 10.1021/acsomega.1c03900. eCollection 2021 Oct 19.
The increasing demand for flexible and wearable electronics has promoted the rapid development of the pressure sensors capable of monitoring diverse human movements and physiological signals. However, more and more research requires the pressure sensor to possess high sensing performance and desires the fabrication to exhibit the characteristics of low cost, large-scale production, high reproduction, even disposability. Here, we propose a full tissue-based capacitive pressure sensor with a sandwiched structure consisting of two MXene-coated tissue electrodes and a blank tissue dielectric layer. The tight contact and adequate adsorption of the MXene sheets with the cellulose fibers endow the electrode with uniform conductivity and high stability over a large area. In addition, the flexible sensor could be conveniently cut into any shape and size to meet the diverse application requirements. Thereby, the pressure sensor exhibits a sensitivity of 0.051 kPa (<7 kPa), a wide detection range of 0.02-160 kPa, a fast response (∼100 ms), and good repeatability. The flexible device has been demonstrated to monitor a variety of human activities and physical stimuli. The assembled sensor array can accurately and reliably detect the pressure distribution.
对柔性和可穿戴电子产品日益增长的需求推动了能够监测多种人体运动和生理信号的压力传感器的快速发展。然而，越来越多的研究要求压力传感器具备高传感性能，并且期望其制造过程具有低成本、大规模生产、高再现性甚至一次性使用的特点。在此，我们提出一种全组织基电容式压力传感器，其具有夹心结构，由两个涂有MXene的组织电极和一个空白组织介电层组成。MXene片与纤维素纤维的紧密接触和充分吸附赋予电极在大面积上均匀的导电性和高稳定性。此外，这种柔性传感器可以方便地切割成任何形状和尺寸，以满足各种应用需求。因此，该压力传感器在<7 kPa时灵敏度为0.051 kPa，检测范围宽达0.02 - 160 kPa，响应速度快（约100 ms），且具有良好的重复性。这种柔性器件已被证明能够监测多种人体活动和物理刺激。所组装的传感器阵列能够准确可靠地检测压力分布。
