Sökning: id:"swepub:oai:DiVA.org:kth-246413" >
Structure dependent...
Structure dependent effect of silicon on the oxidation of Al(111) and Al(100)
-
- Ghadami Yazdi, Milad (författare)
- KTH Royal Institute of Technology,KTH,Tillämpad fysik
-
- Lousada, Claudio M. (författare)
- KTH Royal Institute of Technology,KTH,Materialteknologi
-
- Evertsson, Jonas (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Justus Liebig University Giessen,German Electron Synchrotron (DESY)
-
visa fler...
-
- Rullik, Lisa (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
-
- Soldemo, Markus (författare)
- KTH Royal Institute of Technology,KTH,Tillämpad fysik
-
- Bertram, Florian (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,German Electron Synchrotron (DESY)
-
- Korzhavyi, Pavel A., 1966- (författare)
- KTH Royal Institute of Technology,KTH,Materialteknologi
-
- Weissenrieder, Jonas (författare)
- KTH Royal Institute of Technology
-
- Lundgren, Edvin (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
-
- Göthelid, Mats (författare)
- KTH Royal Institute of Technology,KTH,Tillämpad fysik
-
visa färre...
-
(creator_code:org_t)
- Elsevier, 2019
- 2019
- Engelska.
-
Ingår i: Surface Science. - : Elsevier. - 0039-6028 .- 1879-2758. ; 684, s. 1-11
- Relaterad länk:
-
http://dx.doi.org/10...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://lup.lub.lu.s...
-
visa färre...
Abstract
Ämnesord
Stäng
- The effect of sub-monolayer silicon on the oxidation of Al(111) and Al(100) surfaces was investigated using X-ray Photoelectron Spectroscopy (XPS) and density functional theory (DFT) calculations. On both surfaces the adatom site is preferred over substituting Si into the Al-lattice; on Al(100) the four fold hollow site is vastly favored whereas on Al(111) bridge and hollow sites are almost equal in energy. Upon O 2 exposure, Si is not oxidized but buried at the metal/oxide interface under the growing aluminum oxide. On Al(111), Si has a catalytic effect on both the initial oxidation by aiding in creating a higher local oxygen coverage in the early stages of oxidation and, in particular, at higher oxide coverages by facilitating lifting Al from the metal into the oxide. The final oxide, as measured from the Al2p intensity, is 25–30% thicker with Si than without. This observation is valid for both 0.1 monolayer (ML) and 0.3 ML Si coverage. On Al(100), on the other hand, at 0.16 ML Si coverage, the initial oxidation is faster than for the bare surface due to Si island edges being active in the oxide growth. At 0.5 ML Si coverage the oxidation is slower, as the islands coalesce and he amount of edges reduces. Upon oxide formation the effect of Si vanishes as it is overgrown by Al 2 O 3 , and the oxide thickness is only 6% higher than on bare Al(100), for both Si coverages studied. Our findings indicate that, in addition to a vanishing oxygen adsorption energy and Mott potential, a detailed picture of atom exchange and transport at the metal/oxide interface has to be taken into account to explain the limiting oxide thickness.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Aluminum
- Density functional theory
- Oxidation
- Silicon
- X-ray photoelectron spectroscopy
- Aluminum
- Density functional theory
- Oxidation
- Silicon
- X-ray photoelectron spectroscopy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Ghadami Yazdi, M ...
-
Lousada, Claudio ...
-
Evertsson, Jonas
-
Rullik, Lisa
-
Soldemo, Markus
-
Bertram, Florian
-
visa fler...
-
Korzhavyi, Pavel ...
-
Weissenrieder, J ...
-
Lundgren, Edvin
-
Göthelid, Mats
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Kemi
-
och Annan kemi
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Den kondenserade ...
- Artiklar i publikationen
-
Surface Science
- Av lärosätet
-
Kungliga Tekniska Högskolan
-
Lunds universitet