<div class="csl-bib-body">
<div class="csl-entry">Redondo, J., Michalička, J., Kraushofer, F., Franceschi, G., Šmid, B., Kumar, N., Man, O., Blatnik, M., Wrana, D., Mallada, B., Švec, M., Parkinson, G. S., Setvin, M., Riva, M., Diebold, U., & Čechal, J. (2023). Hematite α‐Fe₂O₃(0001) in Top and Side View: Resolving Long‐Standing Controversies about Its Surface Structure. <i>Advanced Materials Interfaces</i>, <i>10</i>(32), Article 2300602. https://doi.org/10.1002/admi.202300602</div>
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dc.identifier.issn
2196-7350
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/192114
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dc.description.abstract
Hematite is a common iron oxide found in nature, and the α-Fe₂O₃(0001) plane is prevalent on the nanomaterial utilized in photo- and electrocatalytic applications. The atomic-scale structure of the surface remains controversial despite decades of study, partly because it depends on sample history as well as the preparation conditions. Here, a comprehensive study is performed using an arsenal of surface techniques (non-contact atomic force microscopy, scanning tunneling microscopy, low-energy electron diffraction, and X-ray photoemission spectroscopy) complemented by analyses of the near surface region by high-resolution transmission electron microscopy and electron energy loss spectroscopy. The results show that the so-called “bi-phase” termination forms even under highly oxidizing conditions; a (1 × 1) surface is only observed in the presence of impurities. Furthermore, it is shown that the biphase is actually a continuous layer distorted due to a mismatch with the subsurface layers, and thus not the proposed mixture of FeO(111) and α-Fe₂O₃(0001) phases. Overall, the results show how combining surface and cross-sectional imaging provides a full view that can be essential for understanding the role of the near-surface region on oxide surface properties.
en
dc.language.iso
en
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dc.publisher
WILEY
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dc.relation.ispartof
Advanced Materials Interfaces
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dc.subject
iron oxide
en
dc.subject
nc-AFM
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dc.subject
surface structure
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dc.subject
TEM
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dc.subject
XPS
en
dc.title
Hematite α‐Fe₂O₃(0001) in Top and Side View: Resolving Long‐Standing Controversies about Its Surface Structure