Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, Singapore 117583.
Center for Intelligent Sensors and MEMS, National University of Singapore , E6 #05-11F, 5 Engineering Drive 1, Singapore 117608.
ACS Nano. 2017 Oct 24;11(10):10337-10346. doi: 10.1021/acsnano.7b05213. Epub 2017 Oct 10.
A water-air triboelectric nanogenerator (WATENG) is presented for CO sensing application. During the operation of WATENG, two independent charge transfers can be used to characterize the effect of force and humidity, respectively. Thus, the structure of WATENG provides a capability to eliminate these two major interferences in a triboelectric self-powered sensor. With the aid of the polyethylenimine (PEI) coating, WATENG can be used for CO sensing in both static and dynamic conditions. In static condition with a stable CO concentration, the CO sensing is characterized with respect to different relative humidity, and the sensing range can be up to 6000 ppm. In dynamic CO sensing of a pulse gas spray, due to the fast recovery of PEI surface reaction, the sensing range of dynamic situation can be broadened to 30,000 ppm. The self-powered and portable feature of WATENG is preferable as a self-powered amenity sensor for the construction of internet of the things (IoT) sensor networks in the future.
一种水-气摩擦纳米发电机（WATENG）被提出用于 CO 传感应用。在 WATENG 的运行过程中，可以使用两种独立的电荷转移分别来表征力和湿度的影响。因此，WATENG 的结构提供了一种消除摩擦自供电传感器中这两个主要干扰的能力。借助聚烯亚胺（PEI）涂层，WATENG 可用于静态和动态条件下的 CO 传感。在具有稳定 CO 浓度的静态条件下，针对不同的相对湿度对 CO 传感进行了特征描述，传感范围可达 6000 ppm。在脉冲气体喷雾的动态 CO 传感中，由于 PEI 表面反应的快速恢复，动态情况下的传感范围可以扩展到 30000 ppm。WATENG 的自供电和便携特性使其成为未来物联网（IoT）传感器网络中自供电便利传感器的理想选择。
