Chen Yuanfen, Jamshidi Reihaneh, Montazami Reza
College of Mechanical Engineering, Center on Nanoenergy Research, Guangxi University, Nanning 530004, China.
Department of Mechanical Engineering, University of Hartford, West Hartford, CT 06117, USA.
Materials (Basel). 2020 Mar 2;13(5):1112. doi: 10.3390/ma13051112.
In this study, an all-organic, partially transient epidermal sensor with functional poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) conjugated polymer printed onto a water-soluble polyethylene oxide (PEO) substrate is studied and presented. The sensor's electronic properties were studied under static stress, dynamic load, and transient status. Electrode resistance remained approximately unchanged for up to 2% strain, and increased gradually within 6.5% strain under static stress. The electronic properties' dependence on dynamic load showed a fast response time in the range of 0.05-3 Hz, and a reversible stretching threshold of 3% strain. A transiency study showed that the PEO substrate dissolved completely in water, while the PEDOT:PSS conjugated polymer electrode remained intact. The substrate-less, intrinsically soft PEDOT:PSS electrode formed perfect contact on human skin and stayed attached by Van der Waals force, and was demonstrated as a tattoolike epidermal sensor.
在本研究中，我们对一种全有机、部分瞬态的表皮传感器进行了研究并予以展示，该传感器将功能性聚（3,4-乙撑二氧噻吩）聚苯乙烯磺酸盐（PEDOT:PSS）共轭聚合物印刷在水溶性聚环氧乙烷（PEO）基板上。在静态应力、动态载荷和瞬态状态下对该传感器的电子特性进行了研究。在静态应力下，电极电阻在应变高达2%时保持大致不变，而在应变6.5%范围内逐渐增加。电子特性对动态载荷的依赖性表明，其响应时间在0.05 - 3 Hz范围内较快，且可逆拉伸阈值为3%应变。瞬态研究表明，PEO基板在水中完全溶解，而PEDOT:PSS共轭聚合物电极保持完好。无基板、本质柔软的PEDOT:PSS电极在人体皮肤上形成完美接触，并通过范德华力附着，被证明是一种纹身样的表皮传感器。
