National Key Laboratory of Science and Technology on Micro/Nano Fabrication; Beijing Advanced Innovation Center for Integrated Circuits, School of Integrated Circuits, Peking University, Beijing 100871, China.
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.
ACS Nano. 2022 Sep 27;16(9):14679-14692. doi: 10.1021/acsnano.2c05299. Epub 2022 Aug 31.
Multifunctional sensing systems play important roles in a variety of applications, incluing health surveillance, intelligent prothetics, human-machine/ambinece interfaces, and many others. The richness of the signal and the decoupling among multiple parameters are essential for simultaneous, multimodal measurements. However, current multifunctional sensing fails to decouple interferences from various signals. Here, we propose a double-sided wearable system that both enables multifunctional sensing and avoids the interferences among multiple parameters. Specifically, the sensitivities of system modules to strain are controlled through customizing the pattern and morphology of sensing electrodes as well as the modification of active materials. Compensation of temperature drift and selection of sensing mechanisms ensure the thermal stability of the system. The encapsulation of modules resists the interferences of proximity, normal pressure, and gas molecules at the same time. A double-sided partition layout with serpentine interconnections reduces the effect of motion artifacts and ensures simultaneous operation of electrochemical-sensing modules. Cooperation among decoupled modules acts as the bridge between the perception of ambience changes and the timely feedback of the human body. In addition, to sense the signal at the interface, modules for energy harvesting and storage are also integrated into the system to broaden its application scenarios.
多功能传感系统在各种应用中起着重要作用，包括健康监测、智能假体、人机/环境接口等。信号的丰富性和多个参数之间的解耦对于同时进行多模态测量至关重要。然而，目前的多功能传感无法将干扰与各种信号解耦。在这里，我们提出了一种双面可穿戴系统，既能实现多功能传感，又能避免多个参数之间的干扰。具体来说，通过定制传感电极的图案和形态以及对活性材料的修饰，可以控制系统模块对应变的灵敏度。补偿温度漂移和选择传感机制确保了系统的热稳定性。模块的封装同时抵抗接近、正压力和气体分子的干扰。具有蛇形互连的双面分区布局减少了运动伪影的影响，确保了电化学传感模块的同时运行。解耦模块之间的合作充当了感知环境变化和人体及时反馈之间的桥梁。此外，为了感测界面上的信号，还将能量收集和存储模块集成到系统中，以拓宽其应用场景。
