May, Matthias M. and Supplie, Oliver and Höhn, Christian and Zabka, Wolf-Dietrich and Lewerenz, Hans-Joachim and van de Krol, Roel and Hannappel, Thomas (2013) Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy. In: Solar Hydrogen and Nanotechnology VIII. Proceedings of SPIE. No.8822. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 88220M. ISBN 9780819496720. https://resolver.caltech.edu/CaltechAUTHORS:20190917-140930361
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Abstract
In this work, we investigate the initial interaction of water and oxygen with different surface reconstructions of GaP(100) applying photoelectron spectroscopy, low-energy electron diffraction, and reflection anisotropy spectroscopy. Surfaces were prepared by metal-organic vapour phase epitaxy, transferred to ultra-high vacuum, and exposed to oxygen or water vapour at room temperature. The (2 4) reconstructed, Ga-rich surface is more sensitive and reactive to adsorption, bearing a less ordered surface reconstruction upon exposure and indicating a mixture of dissociative and molecular water adsorption. The p(2 2)=c(4 2) P-rich surface, on the other hand, is less reactive, but shows a new surface symmetry after water adsorption. Correlating findings of photoelectron spectroscopy with reflection anisotropy spectroscopy could pave the way towards optical in-situ monitoring of electrochemical surface modifications with reflection anisotropy spectroscopy.
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Additional Information: | © 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). MM May acknowledges a scholarship from Studienstiftung des deutschen Volkes. | ||||||||||||||||
Group: | JCAP | ||||||||||||||||
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Subject Keywords: | GaP, InP, water adsorption, water-splitting, photoelectron spectroscopy, in-situ re ection anisotropy spectroscopy | ||||||||||||||||
Series Name: | Proceedings of SPIE | ||||||||||||||||
Issue or Number: | 8822 | ||||||||||||||||
DOI: | 10.1117/12.2026172 | ||||||||||||||||
Record Number: | CaltechAUTHORS:20190917-140930361 | ||||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190917-140930361 | ||||||||||||||||
Official Citation: | Matthias M. May, Oliver Supplie, Christian Höhn, Wolf-Dietrich Zabka, Hans-Joachim Lewerenz, Roel van de Krol, and Thomas Hannappel "Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy", Proc. SPIE 8822, Solar Hydrogen and Nanotechnology VIII, 88220M (16 September 2013); https://doi.org/10.1117/12.2026172 | ||||||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||
ID Code: | 98686 | ||||||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||||||
Deposited By: | Tony Diaz | ||||||||||||||||
Deposited On: | 17 Sep 2019 22:22 | ||||||||||||||||
Last Modified: | 16 Nov 2021 17:40 |
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