18th International Summer School on Vacuum, Electron and Ion Technologies | |
Room-temperature sensitivity to NO2 exposure of electrochemically-deposited nanostructured ZnO layers | |
Lovchinov, K.^1 ; Petrov, M.^1 ; Ganchev, M.^1 ; Georgieva, V.^2 ; Nichev, H.^1 ; Georgieva, B.^1 ; Dimova-Malinovska, D.^1 | |
Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria^1 | |
Acad. G. Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria^2 | |
关键词: Frequency shift; Nanostructured ZnO; NO2 gas sensor; Resonance frequencies; Resonance frequency shift; Sorption process; Temperature sensitivity; Time characteristics; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012023/pdf DOI : 10.1088/1742-6596/514/1/012023 |
|
来源: IOP | |
【 摘 要 】
This paper reports studies on the sensitivity of ZnO layers to NO2exposure. ZnO layers were fabricated by electrochemical deposition on the surface of a quartz crystal microbalance (QCM) with Au electrodes. The sensitivity was estimated using the frequency-time characteristics of the QCM. For this purpose, the resonance frequency shift was measured. The sorption process was investigated in a NO2gas flow. The change in the resonance frequency, f of the QCM as a function of the loaded mass of NO2was followed for a NO2concentration of 500 ppm. Under gas exposure, the frequency decreased and reached saturation in five min. A frequency shift of 38 Hz was measured and a mass loading of 8.39 ng was calculated. The resonance frequency showed a very good recovery within two minutes after the NO2flow was switched off. The results demonstrate that the electrodeposited nanostructured ZnO layers have a potential for application as NO2gas sensors.
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
Room-temperature sensitivity to NO2 exposure of electrochemically-deposited nanostructured ZnO layers | 644KB | download |