Han Song, Zhao Jingjing, Wang Dongxing, Lu Chao, Chen Wei
i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
J Mater Chem B. 2017 Sep 14;5(34):7126-7132. doi: 10.1039/c7tb01760j. Epub 2017 Aug 17.
Herein, to mimic the human skin's ability to report sensing signals using ions, a novel ionic skin based on a single-ion conductor sandwiched between two carbon nanotube array electrodes was developed. Compared with the widely studied electronic skin, this flexible ionic skin could generate electrical signals without any power supply and distinguish different directions of the bending strain due to ion redistribution induced by mechanical deformation. In this study, the bionic-ordered ion channel and single-ion conductor design in the nanocomposite sensor guarantee simultaneous sensing signal (mV) under a micro-strain as small as 0.0347% with high sensitivity, stability, and linearity. The integrated wearable sensors succeed in detecting the real-time signal of human activities from large-scale deformations to subtle physiological signals including pulse wave at different frequencies and multiple modes of muscle relaxation-contraction. The present study paves a new way for designing artificial skin similar to the natural skin and developing the emerging flexible and wearable sensing platforms for healthcare and biomedical applications.
在此，为了模拟人类皮肤利用离子报告传感信号的能力，开发了一种基于夹在两个碳纳米管阵列电极之间的单离子导体的新型离子皮肤。与广泛研究的电子皮肤相比，这种柔性离子皮肤无需任何电源即可产生电信号，并能区分由于机械变形引起的离子重新分布导致的不同弯曲应变方向。在本研究中，纳米复合传感器中的仿生有序离子通道和单离子导体设计保证了在低至0.0347%的微应变下同时产生传感信号（毫伏），具有高灵敏度、稳定性和线性度。集成的可穿戴传感器成功地检测了从大规模变形到微妙生理信号（包括不同频率的脉搏波和多种肌肉舒张-收缩模式）的人体活动实时信号。本研究为设计类似于天然皮肤的人造皮肤以及开发用于医疗保健和生物医学应用的新兴柔性可穿戴传感平台铺平了一条新道路。
