Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10130579" target="_blank" >RIV/00216208:11320/12:10130579 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.vacuum.2011.07.021" target="_blank" >http://dx.doi.org/10.1016/j.vacuum.2011.07.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.vacuum.2011.07.021" target="_blank" >10.1016/j.vacuum.2011.07.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface

Popis výsledku v původním jazyce

In the present paper we investigated the growth and electronic properties of Pt or Au clusters and formation of Pt-Au bimetallic clusters prepared "in-situ" on tungsten oxide surface by physical deposition under vacuum. The epitaxial tungsten oxide thinfilms were prepared by oxidation of W(110) single-crystal surface using a RF oxygen plasma source followed by thermal annealing. The chemical state of the system, the interaction between deposit and substrate and formation of Pt-Al alloy were investigated by photoelectron spectroscopy excited by synchrotron radiation (SRPES) and K;alpha X-ray source (XPS). We found that in contrary to Au clusters the Pt ones strongly interacts with the substrate. Deposition of both Pt and Au on the surface at the substrate temperature of 300 degrees C gave rise to the formation of bimetallic core shell clusters. The detail structure of the bimetallic system depends on the order of deposited metals. These findings can explain some properties of Pt/WOx an

Název v anglickém jazyce

Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface

Popis výsledku anglicky

In the present paper we investigated the growth and electronic properties of Pt or Au clusters and formation of Pt-Au bimetallic clusters prepared "in-situ" on tungsten oxide surface by physical deposition under vacuum. The epitaxial tungsten oxide thinfilms were prepared by oxidation of W(110) single-crystal surface using a RF oxygen plasma source followed by thermal annealing. The chemical state of the system, the interaction between deposit and substrate and formation of Pt-Al alloy were investigated by photoelectron spectroscopy excited by synchrotron radiation (SRPES) and K;alpha X-ray source (XPS). We found that in contrary to Au clusters the Pt ones strongly interacts with the substrate. Deposition of both Pt and Au on the surface at the substrate temperature of 300 degrees C gave rise to the formation of bimetallic core shell clusters. The detail structure of the bimetallic system depends on the order of deposited metals. These findings can explain some properties of Pt/WOx an

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/LC06058" target="_blank" >LC06058: Centrum studia materiálů s využitím synchrotronového záření.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Vacuum

ISSN

0042-207X

e-ISSN

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Svazek periodika

86

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

586-593

Kód UT WoS článku

000301018400003

EID výsledku v databázi Scopus

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