Hierarchically patterned self-powered sensors for multifunctional tactile sensing
Hierarchically patterned self-powered sensors for multifunctional tactile sensing
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DOI：
10.1126/sciadv.abb9083
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发表时间：
2020-08-01
期刊：
影响因子：
13.6
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Wang, Yang;Wu, Heting;Wang, Zhong Lin
柔性传感器对于触觉感测和可穿戴设备是非常期望的。以往的智能元件研究主要集中在柔性压力或温度传感器上。然而，实现材料识别仍然是一个挑战。在这里，我们报告了一个多功能传感器组成的疏水膜和石墨烯/聚二甲基硅氧烷海绵。通过设计和优化海绵，所制造的传感器具有>15.22每千帕的高压灵敏度，3000次循环的快速响应时间。在温度刺激的情况下，传感器通过热电效应表现出1开尔文的温度感测分辨率。该传感器可以在与不同的扁平材料物理接触后基于接触感应起电产生输出电压信号。相应的信号又可以用于推断材料特性。这种多功能传感器具有低成本和材料识别的优点，为满足功能电子学的挑战提供了设计理念。
Flexible sensors are highly desirable for tactile sensing and wearable devices. Previous researches of smart elements have focused on flexible pressure or temperature sensors. However, realizing material identification remains a challenge. Here, we report a multifunctional sensor composed of hydrophobic films and graphene/polydimethylsiloxane sponges. By engineering and optimizing sponges, the fabricated sensor exhibits a high-pressure sensitivity of >15.22 per kilopascal, a fast response time of 3000 cycles. In the case of temperature stimulus, the sensor exhibits a temperature-sensing resolution of 1 kelvin via the thermoelectric effect. The sensor can generate output voltage signals after physical contact with different flat materials based on contact-induced electrification. The corresponding signals can be, in turn, used to infer material properties. This multifunctional sensor is excellent in its low cost and material identification, which provides a design concept for meeting the challenges in functional electronics.