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2013-10-07Zeitschriftenartikel DOI: 10.1088/1367-2630/15/10/103003
The interface of GaP(100) and H2O studied by photoemission and reflection anisotropy spectroscopy
dc.contributor.authorMay, Matthias M.
dc.contributor.authorSupplie, Oliver
dc.contributor.authorHöhn, Christian
dc.contributor.authorvan de krol, Roel
dc.contributor.authorLewerenz, Hans-Joachim
dc.contributor.authorHannappel, Thomas
dc.date.accessioned2022-07-06T13:28:46Z
dc.date.available2022-07-06T13:28:46Z
dc.date.issued2013-10-07none
dc.date.updated2022-02-10T07:02:36Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25639
dc.description.abstractWe study the initial interaction of adsorbed H2O with P-rich and Ga-rich GaP(100) surfaces. Atomically well defined surfaces are prepared by metal-organic vapour phase epitaxy and transferred contamination-free to ultra-high vacuum, where water is adsorbed at room temperature. Finally, the surfaces are annealed in vapour phase ambient. During all steps, the impact on the surface properties is monitored with in situ reflection anisotropy spectroscopy (RAS). Photoelectron spectroscopy and low-energy electron diffraction are applied for further in system studies. After exposure up to saturation of the RA spectra, the Ga-rich (2 × 4) surface reconstruction exhibits a sub-monolayer coverage in form of a mixture of molecularly and dissociatively adsorbed water. For the p(2 × 2)/c(4 × 2) P-rich surface reconstruction, a new c(2 × 2) superstructure forms upon adsorption and the uptake of adsorbate is significantly reduced when compared to the Ga-rich surface. Our findings show that microscopic surface reconstructions of GaP(100) greatly impact the mechanism of initial interface formation with water, which could benefit the design of e.g. photoelectrochemical water splitting devices.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 3.0) Attribution 3.0 Unportedger
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subject.ddc530 Physiknone
dc.titleThe interface of GaP(100) and H2O studied by photoemission and reflection anisotropy spectroscopynone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25639-3
dc.identifier.doi10.1088/1367-2630/15/10/103003none
dc.identifier.doihttp://dx.doi.org/10.18452/24957
dc.type.versionpublishedVersionnone
local.edoc.container-titleNew journal of physicsnone
local.edoc.pages17none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameIOPnone
local.edoc.container-publisher-place[London]none
local.edoc.container-volume15none
local.edoc.container-issue10none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber103003none
dc.identifier.eissn1367-2630

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