| Literature DB >> 28968080 |
Hao Wang1,2,3,4, Han Wu1, Dihan Hasan1,2,3,4, Tianyiyi He1,2,3,4, Qiongfeng Shi1,2,3,4, Chengkuo Lee1,2,3,4.
Abstract
A water-air triboelectric nanogenerator (WATENG) is presented for CO2 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 CO2 sensing in both static and dynamic conditions. In static condition with a stable CO2 concentration, the CO2 sensing is characterized with respect to different relative humidity, and the sensing range can be up to 6000 ppm. In dynamic CO2 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.Entities:
Keywords: CO2 sensing; charge-based characterization; force free; humidity calibration; portable
Year: 2017 PMID： 28968080 DOI： 10.1021/acsnano.7b05213
Source DB: PubMed Journal: ACS Nano ISSN： 1936-0851 Impact factor: 15.881