About: Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters

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About: Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.apsusc.2013.06.047
Description	In this paper, we investigated formation and structure of gold, platinum and Pt-Au bimetallic clusters on tungsten oxide surface. Crystallographic structure and orientation were investigated by reflection high energy electron diffraction, chemical composition and cluster's electronic state by synchrotron radiation photoelectron spectroscopy. Small amount of Au and Pt was deposited on WO3 (1 1 1) surface prepared by RF plasma oxidation and thermal annealing of (1 1 0) tungsten single crystal surface. Formation of 3D Pt or Au clusters with (1 1 1) epitaxial plane was observed. On the contrary to Au, strong metal substrate interaction between Pt and oxide was found, leading to the encapsulation of Pt clusters. Formation of Au-Pt bimetallic clusters was investigated at the temperature range of 160-870 K. It was found that cluster structure depends on the substrate temperature and order of materials deposition. At the temperatures around 570 K, metals formed bimetallic clusters with core-shell structure. Annealing to the temperatures over 770 K led to the decomposition of Pt-Au clusters and formation of Pt-W alloy. In this paper, we investigated formation and structure of gold, platinum and Pt-Au bimetallic clusters on tungsten oxide surface. Crystallographic structure and orientation were investigated by reflection high energy electron diffraction, chemical composition and cluster's electronic state by synchrotron radiation photoelectron spectroscopy. Small amount of Au and Pt was deposited on WO3 (1 1 1) surface prepared by RF plasma oxidation and thermal annealing of (1 1 0) tungsten single crystal surface. Formation of 3D Pt or Au clusters with (1 1 1) epitaxial plane was observed. On the contrary to Au, strong metal substrate interaction between Pt and oxide was found, leading to the encapsulation of Pt clusters. Formation of Au-Pt bimetallic clusters was investigated at the temperature range of 160-870 K. It was found that cluster structure depends on the substrate temperature and order of materials deposition. At the temperatures around 570 K, metals formed bimetallic clusters with core-shell structure. Annealing to the temperatures over 770 K led to the decomposition of Pt-Au clusters and formation of Pt-W alloy. (en)
Title	Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters (en)
skos:prefLabel	Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters (en)
skos:notation	RIV/00216208:11320/13:10192065!RIV14-MSM-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(LD11047), P(LG12003)
http://linked.open...iv/cisloPeriodika	říjen
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Tsud, Nataliya Matolín, Vladimír Mašek, Karel Beran, Jan Blumentrit, Petr Polášek, Jan Vorokhta, Mykhailo
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	96095
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10192065
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Photoelectron spectroscopy; Electron diffraction; Epitaxy; Tungsten oxide; Au; Pt (en)
http://linked.open.../riv/klicoveSlovo	Electron diffraction Epitaxy Photoelectron spectroscopy Au Pt Tungsten oxide
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[FA94EC8602CB]
http://linked.open...i/riv/nazevZdroje	Applied Surface Science
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Materials science beamline at synchrotron Elettra in Trieste Model Systems of Nanostructured Bimetallic Materials for Enviromental Applications
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	282
http://linked.open...iv/tvurceVysledku	Beran, Jan Matolín, Vladimír Mašek, Karel Tsud, Nataliya Vorokhta, Mykhailo Blumentrit, Petr Polášek, Jan
http://linked.open...ain/vavai/riv/wos	000322314800113
issn	0169-4332
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.apsusc.2013.06.047
http://localhost/t...ganizacniJednotka	11320

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