Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface

The reduction and oxidation of epitaxial Fe(3)O(4) films grown by reactive deposition on a Fe-p(1 × 1)O surface have been investigated by means of Auger electron spectroscopy (AES), low energy electron diffraction (LEED) and scanning tunneling microcopy (STM). The as-grown iron oxide samples display...

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Autores principales: Capra, M., Lodesani, A., Brambilla, A., Finazzi, M., Duò, L., Ciccacci, F., Picone, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8698807/
https://www.ncbi.nlm.nih.gov/pubmed/35423610
http://dx.doi.org/10.1039/d0ra10650j
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author Capra, M.
Lodesani, A.
Brambilla, A.
Finazzi, M.
Duò, L.
Ciccacci, F.
Picone, A.
author_facet Capra, M.
Lodesani, A.
Brambilla, A.
Finazzi, M.
Duò, L.
Ciccacci, F.
Picone, A.
author_sort Capra, M.
collection PubMed
description The reduction and oxidation of epitaxial Fe(3)O(4) films grown by reactive deposition on a Fe-p(1 × 1)O surface have been investigated by means of Auger electron spectroscopy (AES), low energy electron diffraction (LEED) and scanning tunneling microcopy (STM). The as-grown iron oxide samples display a square LEED pattern with a lattice constant compatible with a p(1 × 1) bulk terminated Fe(3)O(4)(001) surface. STM topographic images of Fe(3)O(4) are characterized by atomically flat terraces separated by highly oriented steps running along the (010) and (100) crystallographic directions of the substrate. Upon annealing at 800 K in an ultra-high vacuum, AES reveals that magnetite transforms to FeO. The sample exposes the (001) surface of the rock salt structure, with a lattice parameter close to that of bulk wüstite. The Fe(3)O(4) phase can be recovered by oxidation at 10(−6) mbar of molecular oxygen.
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spelling pubmed-86988072022-04-13 Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface Capra, M. Lodesani, A. Brambilla, A. Finazzi, M. Duò, L. Ciccacci, F. Picone, A. RSC Adv Chemistry The reduction and oxidation of epitaxial Fe(3)O(4) films grown by reactive deposition on a Fe-p(1 × 1)O surface have been investigated by means of Auger electron spectroscopy (AES), low energy electron diffraction (LEED) and scanning tunneling microcopy (STM). The as-grown iron oxide samples display a square LEED pattern with a lattice constant compatible with a p(1 × 1) bulk terminated Fe(3)O(4)(001) surface. STM topographic images of Fe(3)O(4) are characterized by atomically flat terraces separated by highly oriented steps running along the (010) and (100) crystallographic directions of the substrate. Upon annealing at 800 K in an ultra-high vacuum, AES reveals that magnetite transforms to FeO. The sample exposes the (001) surface of the rock salt structure, with a lattice parameter close to that of bulk wüstite. The Fe(3)O(4) phase can be recovered by oxidation at 10(−6) mbar of molecular oxygen. The Royal Society of Chemistry 2021-03-19 /pmc/articles/PMC8698807/ /pubmed/35423610 http://dx.doi.org/10.1039/d0ra10650j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Capra, M.
Lodesani, A.
Brambilla, A.
Finazzi, M.
Duò, L.
Ciccacci, F.
Picone, A.
Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title_full Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title_fullStr Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title_full_unstemmed Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title_short Reversible metamorphosis from Fe(3)O(4) to FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface
title_sort reversible metamorphosis from fe(3)o(4) to feo of epitaxial iron oxide films grown on the fe-p(1 × 1)o surface
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8698807/
https://www.ncbi.nlm.nih.gov/pubmed/35423610
http://dx.doi.org/10.1039/d0ra10650j
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