| Title: | Crystalline-to-Amorphous Phase Transformation in CuO Nanowires for Gaseous Ionization and Sensing Application |
| Author(s): | Liu H; Zhang H; Zhu W; Bo M; Zhao T; |
| Address: | "Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai 200072, China. Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM) of Chongqing, Yangtze Normal University, Chongqing 408100, China" |
| DOI: | 10.1021/acssensors.1c01638 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "We report a dramatic reduction of operation voltage of a CuO nanowire-based ionization gas sensor due to the crystalline-to-amorphous phase transformation. The structural change is attributed to the ion bombardment and heating effect during the initial discharge, which brings about the formation of abundant nanocrystallites and surface states favoring gaseous ionization. The gas-sensing properties of the CuO nanowire sensor are confirmed by differentiating various types or concentrations of volatile organic compounds diluted in nitrogen, with a low detection limit at the ppm level. Moreover, a sensing mechanism is proposed on the basis of charge redistribution by electron-gas collision related to the specific ionization energy. The insightful study of the electrode microstructure delivers an exploratory investigation to the effect of gas ionization toward the discharge system, which provides new approaches to develop advanced ionization gas sensors" |
| Keywords: | Copper Electrodes Gases *Nanowires gas ionization gas sensor nanowire phase transition volatile organic compounds; |
| Notes: | "MedlineLiu, Hai Zhang, Haoyu Zhu, Wenhuan Bo, Maolin Zhao, Tingting eng Research Support, Non-U.S. Gov't 2021/10/28 ACS Sens. 2021 Nov 26; 6(11):4118-4125. doi: 10.1021/acssensors.1c01638. Epub 2021 Oct 27" |
