title: Highly sensitive H2S sensors based on Cu2O/Co3O4nano/microstructure heteroarrays at and below room temperature.
abstract: Gas sensors with high sensitivity at and below room temperature, especially below freezing temperature, have been expected for practical application. The lower working temperature of gas sensor is better for the manufacturability, security and environmental protection. Herein, we propose a H2S gas sensor with high sensitivity at and below room temperature, even as low as -30 °C, based on Cu2O/Co3O4nano/microstructure heteroarrays prepared by 2D electrodeposition technique. This heteroarray was designed to be a multi-barrier system, and which was confirmed by transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and scanning probe microscopy. The sensor demonstrates excellent sensitivity, sub-ppm lever detection, fast response, and high activity at low temperature. The enhanced sensing property of sensor was also discussed with the Cu2O/Co3O4p-p heterojunction barrier modulation and Cu2S conductance channel. We realize the detection of the noxious H2S gas at ultra-low temperature in a more security and environmental protection way.
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Guangliang
authors.initials: G
authors.lastname: Cui
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Pinhua
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of science, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Jianfu
authors.initials: J
authors.lastname: Li
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Changmin
authors.initials: C
authors.lastname: Shi
authors.affiliation: Institute of Condensed Matter Physics, Linyi University, Linyi, Shandong 276000, China.
authors.forename: Dongchao
authors.initials: D
authors.lastname: Wang