Hybrid printing of wearable piezoelectric sensors
Hybrid printing of wearable piezoelectric sensors
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DOI：
10.1016/j.nanoen.2021.106522
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发表时间：
2021-09-22
期刊：
影响因子：
17.6
通讯作者：
Zhang, Yanliang
中科院分区：
文献类型：
--
作者：
Du, Yipu;Wang, Ruoxing;Zhang, Yanliang
压电提供了一种理想的机电机制，由于其简单性和自供电性质，在可穿戴设备中具有新兴的应用。然而，压电器件的3D打印仍然面临许多挑战，包括材料的可打印性，高能量极化工艺和低尺寸精度。这项研究表明，第一次，碲铱基压电器件制造的混合印刷方法集成了高度互补的气溶胶喷射印刷和挤出印刷在一个单一的印刷平台。由于碲纳米线的独特性质，气溶胶喷射打印的碲纳米线展示了压电性质，而不需要任何极化处理。通过气溶胶喷射印刷的银纳米线电极表现出优异的导电性和可拉伸性，而不需要烧结。采用挤出方法印刷硅树脂膜，其用作可拉伸基底和印刷碲和银之间的电绝缘层。打印的可穿戴压电设备连接到人类手腕上以检测不同的手势，并连接到人类颈部以检测心跳，而无需使用外部电源。这种完全印刷、免烧结、免极化、可拉伸的压电器件为与各种印刷电子产品和可穿戴设备轻松集成提供了巨大的机会。
Piezoelectricity provides an ideal electromechanical mechanism with emerging applications in wearable devices due to its simplicity and self-powered nature. However, the 3D printing of piezoelectric devices still faces many challenges, including material printability, high energy poling process, and low dimensional accuracy. This study demonstrates, for the first time, a tellurium nanowire-based piezoelectric device fabricated by a hybrid printing method integrating highly complementary aerosol jet printing and extrusion printing in a single printing platform. The aerosol-jet-printed tellurium nanowire demonstrates piezoelectric properties without the need for any poling processing due to the unique properties of the tellurium nanowires. The silver nanowire electrodes printed by aerosol jet printing demonstrate excellent conductivity and stretchability without the need for sintering. An extrusion method is employed to print the silicone films, which serve as the stretchable substrate and the electrical insulation layers between the printed tellurium and silver. The printed wearable piezoelectric devices were attached to a human wrist to detect different hand gestures and to a human neck to detect heartbeat without using an external power source. The fully printed, sintering-free and poling-free, and stretchable piezoelectric device opens enormous opportunities for facile integration with a broad range of printed electronics and wearable devices.