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Surface processes in the detection of reducing gases with SnO2-based devices by D. Kohl is a Engineering article available to read on EtoBox.
What is Surface processes in the detection of reducing gases with SnO2-based devices about?
Single-crystal faces, thin evaporated and sputtered films and sintered specimens of Sn02 were investigated in UHV. After exposure to hydrogen, water, amine, carbon monoxide, methane, acetic acid and ethanol, a sensitive mass spectrometer recorded the desorbing species in thermal desorption spectroscopy and served for reactive scattering investigations. The surface conductivity was observed at the same time. The combination of the different results with published infrared spectroscopic data allows some conclusions to be drawn on reaction mechanisms, surface binding and the origin of conductance variations. It will be shown that even such a simple molecule as methane undergoes many reaction steps, some of which affect the observed conductance change. The investigation of more complex molecules, such as ethanol and acetic acid, supports the understanding of the methane reactions; the decomposition of methane on SnOz is accompanied by synthesis reactions yielding these products. Finally, some consequences and possible improvements of gas sensors are discussed.
Who reads Surface processes in the detection of reducing gases with SnO2-based devices?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- D. Kohl
- Published
- 1989
- Language
- EN
- Field
- Engineering (Physical Sciences)