Hierarchically Microstructure-Bioinspired Flexible Piezoresistive Bioelectronics
Hierarchically Microstructure-Bioinspired Flexible Piezoresistive Bioelectronics
复制标题
分层微结构仿生柔性压阻生物电子学。
DOI：
10.1021/acsnano.1c01606
复制
发表时间：
2021-06-15
期刊：
影响因子：
17.1
通讯作者：
Yang, Weiqing
中科院分区：
文献类型：
--
作者：
Yang, Tao;Deng, Weili;Yang, Weiqing
用于人机交互和人体健康监测的自然微结构仿生压阻传感器为可穿戴生物电子产品提供了一个有吸引力的机会。然而，由于灵敏度和线性检测范围之间的权衡，获得既具有宽压力监测范围又具有高灵敏度的压阻传感器仍然是一个巨大的挑战。在此，我们设计了一种分层微结构仿生柔性压阻传感器，由夹在两个具有微圆顶结构的互锁电极之间的分层聚苯胺/聚偏二氟乙烯纳米纤维（HPPNF）薄膜组成。由于3D变形率大幅提高，这些生物电子器件表现出53 kPa-1的超高灵敏度、58.4至960 Pa的压力检测范围、38 ms的快速响应时间以及超过50000次循环的优异循环稳定性。此外，这种保形皮肤粘附传感器成功地演示了对人体生理信号和运动状态的监测，例如手腕脉搏、喉咙活动、脊柱姿势和步态识别。显然，这种分层微结构仿生放大灵敏度压阻传感器为下一代可穿戴生物电子学的快速发展提供了一种有前景的策略。
The naturally microstructure-bioinspired piezoresistive sensor for human-machine interaction and human health monitoring represents an attractive opportunity for wearable bioelectronics. However, due to the trade-off between sensitivity and linear detection range, obtaining piezoresistive sensors with both a wide pressure monitoring range and a high sensitivity is still a great challenge. Herein, we design a hierarchically microstructure-bioinspired flexible piezoresistive sensor consisting of a hierarchical polyaniline/polyvinylidene fluoride nanofiber (HPPNF) film sandwiched between two interlocking electrodes with microdome structure. Ascribed to the substantially enlarged 3D deformation rates, these bioelectronics exhibit an ultrahigh sensitivity of 53 kPa-1, a pressure detection range from 58.4 to 960 Pa, a fast response time of 38 ms, and excellent cycle stability over 50 000 cycles. Furthermore, this conformally skin-adhered sensor successfully demonstrates the monitoring of human physiological signals and movement states, such as wrist pulse, throat activity, spinal posture, and gait recognition. Evidently, this hierarchically microstructure-bioinspired and amplified sensitivity piezoresistive sensor provides a promising strategy for the rapid development of next-generation wearable bioelectronics.