传感技术学报2025，Vol.38Issue(3)：442-450,9.DOI:10.3969/j.issn.1004-1699.2025.03.010
电场调制下石墨烯基气体传感器氨气响应性能研究
Study on Ammonia Response Performance of Graphene Based Gas Sensor under Electric Field Modulation
摘要
Abstract
In order to achieve fast,sensitive,and stable response of graphene-based gas sensors to ammonia at room temperature,a kind of device with field-effect transistor structure is designed and the influences of backgate voltage on the response performance of pristine graphene devices,Au or Pt single-metal-modified graphene devices,and Au/Pt bimetallic-modified graphene devices to ammonia at room temperature is compared.Metal modification improves the ammonia response intensity and recovery time of graphene devices,while the response performance of Au/Pt bimetallic-modified devices shows a significant dependence on the back gate voltage with a response time of 54 s,a response of 16.2%and recovery time of 4.6 min for 200×10-6 NH3.Based on density functional theory,the changes in state density near the Fermi level,adsorption energy,adsorption distance,and transfer charge in sensitive area of different devices are calculated.The response mechanisms of devices mentioned above are also discussed.关键词
石墨烯基室温气体传感器/Au/Pt双金属修饰/NH3检测/响应机制Key words
graphene based room temperature gas sensor/Au/Pt bimetallic modification/NH3test/response mechanism分类
计算机与自动化引用本文复制引用
赵珉,褚卫国,刘桂英,纪捷先..电场调制下石墨烯基气体传感器氨气响应性能研究[J].传感技术学报,2025,38(3):442-450,9.基金项目
广东省普通高校重点领域专项项目(2022ZDZX1016) （2022ZDZX1016）
湛江市科技发展专项资金竞争性分配项目(2021A05035) （2021A05035）
