非阻塞I/O
异质结
磁性
材料科学
磁场
吸附
灵敏度(控制系统)
纳米技术
电导率
凝聚态物理
分析化学(期刊)
光电子学
化学
物理化学
电子工程
催化作用
物理
生物化学
色谱法
量子力学
工程类
作者
Haoming Sun,Meng Cao,Pinhua Zhang,Xiaojing Tian,Manli Lu,Lulu Du,Kaifeng Xue,Guangliang Cui
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2022-06-22
卷期号:7 (7): 1903-1911
被引量:10
标识
DOI:10.1021/acssensors.2c00495
摘要
Magnetism is a promising external intervention for gas sensitivity based on a heterogeneous interfacial structure caused by the regulation of the heterogeneous interface conductivity and the surface oxygen adsorption. In this study, Cu2O/NiO heterostructure-ordered nanoarrays were prepared with a two-dimensional (2D) electrodeposition in situ assembly method for H2S gas detection at room temperature under the action of a magnetic field. The nanoarrays were multibarrier structures with a strictly periodic structure that was greater than hundreds of microns in size. The experimental data confirmed that the response of 50 ppm of H2S based on the nanoarrays was improved by nearly 61% with a relatively weak magnetic field. Particularly at a low concentration (≤20 ppm), the effect of the magnetic field enhancement on the sensitivity was more obvious. We attributed the enhancement of the gas sensitivity with the magnetic field to the regulation of the Cu2O–NiO interface conductance and the surface oxygen adsorption. This study demonstrated that a magnetic field could significantly enhance the gas sensitivity based on heterostructures. Results of this study provide an important reference for the application of magnetism in gas detection and the design of new gas-sensitive materials.
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