Self-Powered Dual-Mode Amenity Sensor Based on the Water-Air Triboelectric Nanogenerator.
basic_science · Level V
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- Record sourced from PubMed, PMID 28968080.
- Also identified by DOI 10.1021/acsnano.7b05213.
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Abstract
A water-air triboelectric nanogenerator (WATENG) is presented for CO<sub>2</sub> 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<sub>2</sub> sensing in both static and dynamic conditions. In static condition with a stable CO<sub>2</sub> concentration, the CO<sub>2</sub> sensing is characterized with respect to different relative humidity, and the sensing range can be up to 6000 ppm. In dynamic CO<sub>2</sub> 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.