Self-Powered Graphene Oxide Humidity Sensor Based on Potentiometric Humidity Transduction Mechanism
Self-Powered Graphene Oxide Humidity Sensor Based on Potentiometric Humidity Transduction Mechanism
复制标题
基于电位湿度转换机制的自供电氧化石墨烯湿度传感器
DOI：
10.1002/adfm.202107330
复制
发表时间：
2021-11-23
影响因子：
19
通讯作者：
Gao, Yihua
中科院分区：
文献类型：
--
作者：
Lei, Dandan;Zhang, Qixiang;Gao, Yihua
非接触式湿度传感器作为物联网和人工智能的人机交互已被广泛探索。然而，除了现有的传感机制，如电阻，电容，和功能基团梯度的设备，很少有人注意到开发新的传感机制与新的性能，可以满足小型化和集成化的要求。在这里，一个自供电的电位湿度转导机制，它调制两个电极之间的测量电位差的氧化石墨烯（GO）固体电解质上的湿度刺激，报告。在此基础上，研制了一种高度可调的电位式湿度传感器，该传感器具有还原氧化石墨烯/GO/泡沫金属（镍、锌、铁和铜）的三明治结构，具有良好的可扩展性和成本效益，能够实现快速响应/恢复（0.8 s/2.4 s）、超高响应（0.77 V）和优异的稳定性（超过1500次循环）。与传统的传感机构不同，本文提出的操纵机构具有自供电能力，不需要额外的动力单元，并且具有超低功耗。这些结果为自供电式湿度传感器的研究和开发提供了一种新的方案，这些传感器在非接触式传感应用中表现出上级的性能。
Non-contact humidity sensors have been widely explored as human-computer interaction for the internet of things and artificial intelligence. However, except for the existing sensing mechanisms, such as resistive, capacitive, and functional groups gradient based device, little attention has been paid to exploiting new sensing mechanisms with novel properties which can meet the requirements of miniaturization and integration. Here, a self-powered potentiometric humidity-transduction mechanism, which modulates the measured potential difference between two electrodes by humidity stimulation on the graphene oxide (GO) solid electrolyte, is reported. On the strength of this mechanism, a highly adjustable potentiometric humidity sensor with sandwich structure of reduced graphene oxide/GO/foamed metal (nickel, zinc, iron and copper), exhibiting good scalability and cost-efficiency, enabling fast response/recovery (0.8 s/2.4 s), ultra-high response (0.77 V) and excellent stability (over 1500 cycles) is developed. Unlike traditional sensing mechanisms, the manipulation mechanism raised here shows self-powered ability with no need for an additional power unit and has ultra-low power consumption. These results provide a new scheme for the research and development of self-powered humidity sensors, and these sensors show superior performance in non-contact sensing applications.