title: Selective Sensing of Gas Mixture via a Temperature Modulation Approach: New Strategy for Potentiometric Gas Sensor Obtaining Satisfactory Discriminating Features.
abstract: A new strategy to discriminate four types of hazardous gases is proposed in this research. Through modulating the operating temperature and the processing response signal with a pattern recognition algorithm, a gas sensor consisting of a single sensing electrode, i.e., ZnO/In₂O₃ composite, is designed to differentiate NO₂, NH₃, C₃H₆, CO within the level of 50-400 ppm. Results indicate that with adding 15 wt.% ZnO to In₂O₃, the sensor fabricated at 900 °C shows optimal sensing characteristics in detecting all the studied gases. Moreover, with the aid of the principle component analysis (PCA) algorithm, the sensor operating in the temperature modulation mode demonstrates acceptable discrimination features. The satisfactory discrimination features disclose the future that it is possible to differentiate gas mixture efficiently through operating a single electrode sensor at temperature modulation mode.
authors.affiliation: Gas Sensors & Sensing Technology Lab., Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China. fu.anli@163.com.|School of Information Engineering, Huangshan University, Huangshan 245021, China. fu.anli@163.com.
authors.forename: Fu-An
authors.initials: FA
authors.lastname: Li
authors.affiliation: Gas Sensors & Sensing Technology Lab., Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China. jinhan@nbu.edu.cn.
authors.forename: Han
authors.initials: H
authors.lastname: Jin
authors.affiliation: School of Electronic and Information Engineering, Ningbo University of Technology, Ningbo 315211, China. wangjx@nbut.edu.cn.
authors.forename: Jinxia
authors.initials: J
authors.lastname: Wang
authors.affiliation: Gas Sensors & Sensing Technology Lab., Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China. zoujie@nbu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Zou
authors.affiliation: Gas Sensors & Sensing Technology Lab., Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China. Jianjiawen@nbu.edu.cn.
authors.forename: Jiawen
authors.initials: J
authors.lastname: Jian
keywords: In2O3; PCA; Temperature modulation; ZnO; discriminating features