NAP-XPS Study of Ethanol Adsorption on TiO2 Surfaces and Its Impact on Microwave-Based Gas Sensors Response

NAP-XPS Study of Ethanol Adsorption on TiO2 Surfaces and Its Impact on Microwave-Based Gas Sensors Response

This work presents new elements of understanding for the microwave-based gas sensors behavior at room temperature. A TiO2-covered microstrip interdigital capacitor was submitted to various ethanol concentrations and showed a proportional response in the 1–10 GHz microwave range. For each concentrati...

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Bibliographic Details
Main Authors: Guillaume Bailly, Jerome Rossignol, Didier Stuerga, Pierre Pribetich, Bruno Domenichini
Format: Article
Language:English
Published: MDPI AG 2017-08-01
Series:Proceedings
Subjects:
ethanol adsorption
NAP-XPS
microwave-gas sensors
Online Access:https://www.mdpi.com/2504-3900/1/4/416
Description
Summary:This work presents new elements of understanding for the microwave-based gas sensors behavior at room temperature. A TiO2-covered microstrip interdigital capacitor was submitted to various ethanol concentrations and showed a proportional response in the 1–10 GHz microwave range. For each concentration and right after ethanol injection, the sensor response presented a slight overshoot which is often found in gas sensors studies. Near ambient pressure photoemission experiments (NAP-XPS) were conducted to explore the physicochemical causes of this overshoot, and demonstrated the formation of an ethoxide during ethanol adsorption.
ISSN:2504-3900

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