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Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy

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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2026172DOIArticle
ORCID:
AuthorORCID
May, Matthias M.0000-0002-1252-806X
Supplie, Oliver0000-0002-2424-7118
Höhn, Christian0000-0002-2043-598X
Zabka, Wolf-Dietrich0000-0002-4949-6495
Lewerenz, Hans-Joachim0000-0001-8433-9471
van de Krol, Roel0000-0003-4399-399X
Hannappel, Thomas0000-0002-6307-9831
Additional Information:© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). MM May acknowledges a scholarship from Studienstiftung des deutschen Volkes.
Group:JCAP
Funders:
Funding AgencyGrant Number
Studienstiftung des deutschen VolkesUNSPECIFIED
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
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:03 Oct 2019 21:43

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