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  Surface structure of γ-Fe2O3(111)

Bowker, M., Hutchings, G., Davies, P. R., Edwards, D., Davies, R., Shaikhutdinov, S. K., et al. (2012). Surface structure of γ-Fe2O3(111). Surface science, 606(21-22), 1594-1599. doi:10.1016/j.susc.2012.06.010.

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edoc 1578016 accepted version.pdf (Any fulltext), 464KB
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edoc 1578016 accepted version.pdf
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2012
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Elsevier
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 Creators:
Bowker, Michael1, Author
Hutchings, Graham1, Author
Davies, Philip R.1, Author
Edwards, Dyfan1, Author
Davies, Robert1, Author
Shaikhutdinov, Shamil Kamilovich2, Author           
Freund, Hans-Joachim2, Author           
Affiliations:
1Wolfson Nanoscience Laboratory and Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK, ou_persistent22              
2Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              

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Free keywords: Iron oxide surfaces Maghemite γ Fe₂O₃ STM ISS LEED
 Abstract: The surface structure of γ-Fe₂O₃(111) has been investigated with a range of surface techniques. Two different surface structures were discovered depending upon surface preparation techniques. Sputtering followed by annealing in vacuum produced a reduced surface characterised by a (2 × 2) LEED pattern, whereas sputtering followed by annealing in 1 × 10⁻⁶ mbar oxygen produced a surface characterised by a (√3 × √3)-R30° LEED pattern. The latter appears to be a very low conductivity surface, whereas the former has the band gap expected for maghemite (~ 2.0 eV). We propose that the reduced surface is a magnetite-like layer, whereas the oxidised surface is an Fe₂O₃-like layer.

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Language(s): eng - English
 Dates: 2012-01-292012-06-222012-07-162012-11
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.susc.2012.06.010
 Degree: -

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Title: Surface science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 606 (21-22) Sequence Number: - Start / End Page: 1594 - 1599 Identifier: Other: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028