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Magnetic-Field-Enhanced H2S Sensitivity of Cu2O/NiO Heterostructure Ordered Nanoarrays
ACS Sensors ( IF 8.2 ) Pub Date : 2022-06-21 , DOI: 10.1021/acssensors.2c00495 Haoming Sun 1 , Meng Cao 2 , Pinhua Zhang 3 , Xiaojing Tian 1 , Manli Lu 3 , Lulu Du 3 , Kaifeng Xue 3 , Guangliang Cui 3
ACS Sensors ( IF 8.2 ) Pub Date : 2022-06-21 , DOI: 10.1021/acssensors.2c00495 Haoming Sun 1 , Meng Cao 2 , Pinhua Zhang 3 , Xiaojing Tian 1 , Manli Lu 3 , Lulu Du 3 , Kaifeng Xue 3 , Guangliang Cui 3
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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.
中文翻译：
Cu2O/NiO异质结构有序纳米阵列的磁场增强H2S灵敏度
磁性是基于异质界面电导率和表面氧吸附调节引起的异质界面结构的一种有前途的气敏外部干预措施。本研究采用二维（2D）电沉积原位组装法制备了Cu 2 O/NiO异质结构有序纳米阵列，用于室温下磁场作用下的H 2 S气体检测。纳米阵列是具有严格周期性结构的多势垒结构，其尺寸大于数百微米。实验数据证实，50 ppm H 2的响应基于纳米阵列的 S 在磁场相对较弱的情况下提高了近 61%。特别是在低浓度（≤20 ppm）下，磁场增强对灵敏度的影响更为明显。我们将磁场对气体敏感性的增强归因于 Cu 2 O-NiO 界面电导和表面氧吸附的调节。该研究表明，磁场可以显着提高基于异质结构的气体敏感性。该研究结果为磁性在气体检测中的应用以及新型气敏材料的设计提供了重要参考。
更新日期：2022-06-21
中文翻译：
Cu2O/NiO异质结构有序纳米阵列的磁场增强H2S灵敏度
磁性是基于异质界面电导率和表面氧吸附调节引起的异质界面结构的一种有前途的气敏外部干预措施。本研究采用二维（2D）电沉积原位组装法制备了Cu 2 O/NiO异质结构有序纳米阵列，用于室温下磁场作用下的H 2 S气体检测。纳米阵列是具有严格周期性结构的多势垒结构，其尺寸大于数百微米。实验数据证实，50 ppm H 2的响应基于纳米阵列的 S 在磁场相对较弱的情况下提高了近 61%。特别是在低浓度（≤20 ppm）下，磁场增强对灵敏度的影响更为明显。我们将磁场对气体敏感性的增强归因于 Cu 2 O-NiO 界面电导和表面氧吸附的调节。该研究表明，磁场可以显着提高基于异质结构的气体敏感性。该研究结果为磁性在气体检测中的应用以及新型气敏材料的设计提供了重要参考。
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