{"title":"SO2 Gas Detection Using GLAD-Synthesized ZnO Nanowires","authors":"K. Moatemsu Aier;Jay Chandra Dhar","doi":"10.1109/LSENS.2024.3440044","DOIUrl":null,"url":null,"abstract":"Zinc oxide nanowires (ZnO NWs) grown using a simple catalytic-free technique called glancing angle deposition retrofitted to a magnetron sputtering unit have been studied for sulfur dioxide (SO\n<sub>2</sub>\n) gas sensing application. The fabricated sensor showed good response (18.19%) toward SO\n<sub>2</sub>\n at 300 °C under low ppm concentration (3 ppm) level. Temperature-dependent reaction involved between the ionosorbed surface oxygen and the target gas (SO\n<sub>2</sub>\n) on the large surface area of the ZnO NWs might have played a crucial role in enhancing the sensor response. Furthermore, the as-grown sample showed good selectivity toward different interfering gases, such as NO\n<sub>2</sub>\n (2.75%) and CO (1.45%). Also, fast adsorption/desorption kinetics of SO\n<sub>2</sub>\n on the NW surface even at low ppm (3 ppm) concentration was observed resulting in good response (41.82 s) and recovery (84.93 s) process of the sensor.","PeriodicalId":13014,"journal":{"name":"IEEE Sensors Letters","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Sensors Letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10629053/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Zinc oxide nanowires (ZnO NWs) grown using a simple catalytic-free technique called glancing angle deposition retrofitted to a magnetron sputtering unit have been studied for sulfur dioxide (SO
2
) gas sensing application. The fabricated sensor showed good response (18.19%) toward SO
2
at 300 °C under low ppm concentration (3 ppm) level. Temperature-dependent reaction involved between the ionosorbed surface oxygen and the target gas (SO
2
) on the large surface area of the ZnO NWs might have played a crucial role in enhancing the sensor response. Furthermore, the as-grown sample showed good selectivity toward different interfering gases, such as NO
2
(2.75%) and CO (1.45%). Also, fast adsorption/desorption kinetics of SO
2
on the NW surface even at low ppm (3 ppm) concentration was observed resulting in good response (41.82 s) and recovery (84.93 s) process of the sensor.