Multifunctional Nano Bio Electronics Lab, Department of Advanced Materials Science and Engineering , Sungkyunkwan University , Suwon 16419 , South Korea.
Department of Information and Communication Engineering (ICE) , Daegu Gyeongbuk Institute of Science and Technology (DGIST) , Daegu 42988 , South Korea.
ACS Appl Mater Interfaces. 2019 Aug 7;11(31):28387-28396. doi: 10.1021/acsami.9b06363. Epub 2019 Jul 25.
Physiological monitoring through skin patch stretchable devices has received extensive attention because of their significant findings in many human-machine interaction applications. In this paper, we present novel nature-inspired, kiri-spider, serpentine structural designs to sustain mechanical deformations under complex stress environments. Strain-free mechanical structures involving stable high areal coverage (spiderweb), three-dimensional out-of-plane deformations (kirigami), and two-dimensional (2D) stretchable (2D spring) electrodes demonstrated high levels of mechanical loading under various strains, which were verified through theoretical and experimental studies. Alternative to conventional microfabrication procedures, sensors fabricated by a facile and rapid benchtop programmable laser machine enabled the realization of low-cost, high-throughput manufacture, followed by transferring procedures with a nearly 100% yield. For the first time, we demonstrated laser-processed thin (∼10 μm) flexible filamentary patterns embedded within the solution-processed polyimide to make it compatible with current flexible printed circuit board electronics. A patch-based sensor with thin, breathable, and sticky nature exhibited remarkable water permeability >20 g h m at a thickness of 250 μm. Moreover, the reusability of the sensor patch demonstrated the significance of our patch-based electrophysiological sensor. Furthermore, this wearable sensor was successfully implemented to control human-machine interfaces to operate home electronic appliances and monitor mental stress in a pilot study. These advances in novel mechanical architectures with good sensing performances provide new opportunities in wearable smart sensors.
通过皮肤贴片可拉伸设备进行生理监测因其在许多人机交互应用中具有重要发现而受到广泛关注。在本文中，我们提出了新颖的受自然启发的、奇里蜘蛛、蛇形结构设计，以在复杂的应力环境下维持机械变形。无应变的机械结构包括稳定的高面积覆盖率（蜘蛛网）、三维面外变形（剪纸）和二维（2D）可拉伸（2D 弹簧）电极，通过理论和实验研究验证了它们在各种应变下具有高水平的机械负载能力。替代传统的微制造工艺，通过简便快速的台式可编程激光机制造的传感器实现了低成本、高通量制造，然后通过接近 100%的产率进行转移过程。我们首次展示了激光处理的薄（约 10 µm）柔性丝状图案嵌入到溶液处理的聚酰亚胺中，使其与当前的柔性印刷电路板电子兼容。基于贴片的传感器具有薄、透气和粘性的特性，在厚度为 250 µm 时表现出出色的水透过率 >20 g h m。此外，传感器贴片的可重复使用性证明了我们基于贴片的电生理传感器的重要性。此外，该可穿戴传感器成功地用于控制人机接口以操作家庭电器，并在试点研究中监测精神压力。这些具有良好传感性能的新型机械结构的进步为可穿戴智能传感器提供了新的机会。
