GS1.1 - Surface Chemistry of Semiconducting Metal Oxides, Viewed at the Atomic Scale
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- Gas Sensors 1 - Fundamentals
- M. Setvín, M. Wagner, G. Parkinson, M. Schmid, U. Diebold - Institute of Applied Physics, TU Wien (Austria)
- 62 - 63
The adsorption of molecules at the surfaces of semiconducting metal oxides, and the related charge transfer to and from the material, lies at the heart of chemical sensing. With surface-science techniques such process can be directly followed, one molecule at a time. Although these experiments are conducted in conditions that are remote from ‘real’ systems, i.e., usually on flat, macroscopic, single crystals and in ultrahigh-vacuum conditions, they give powerful insights into fundamental processes and phenomena, especially when combined with first-principles theory. We discuss recent results from atomically resolved Scanning Probe Microscopy, with special emphasis on the adsorption and charge transfer of O2, water, CO, and small organic molecules on TiO2, In2O3, and iron oxide surfaces.