title: Light-controlling, flexible and transparent ethanol gas sensor based on ZnO nanoparticles for wearable devices.
abstract: In recent years, owing to the significant applications of health monitoring, wearable electronic devices such as smart watches, smart glass and wearable cameras have been growing rapidly. Gas sensor is an important part of wearable electronic devices for detecting pollutant, toxic, and combustible gases. However, in order to apply to wearable electronic devices, the gas sensor needs flexible, transparent, and working at room temperature, which are not available for traditional gas sensors. Here, we for the first time fabricate a light-controlling, flexible, transparent, and working at room-temperature ethanol gas sensor by using commercial ZnO nanoparticles. The fabricated sensor not only exhibits fast and excellent photoresponse, but also shows high sensing response to ethanol under UV irradiation. Meanwhile, its transmittance exceeds 62% in the visible spectral range, and the sensing performance keeps the same even bent it at a curvature angle of 90(o). Additionally, using commercial ZnO nanoparticles provides a facile and low-cost route to fabricate wearable electronic devices.
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Physics &Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P. R. China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Physics &Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P. R. China.
authors.forename: J D
authors.initials: JD
authors.lastname: Yao
authors.affiliation: Shenzhen Key Lab of Micro-nano Photonic Information Technology, Shenzhen Key Laboratory of Sensor Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China.
authors.forename: B
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Physics &Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P. R. China.
authors.forename: G W
authors.initials: GW
authors.lastname: Yang
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis*; D004867:Equipment Design; D000431:Ethanol / Q000032:analysis*; D005740:Gases / Q000032:analysis*; D006801:Humans; D008839:Microelectrodes; D055616:Microtechnology; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D055668:Photochemical Processes; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D005740:Gases; D000431:Ethanol; D015034:Zinc Oxide