Reversible oxidation–reduction of epitaxial iron oxide films on Pt(111): Magnetite–hematite interconversion

2020 ◽  
Vol 152 (5) ◽  
pp. 054701 ◽  
Author(s):  
Kinga Freindl ◽  
Joanna Wojas ◽  
Natalia Kwiatek ◽  
Józef Korecki ◽  
Nika Spiridis
Keyword(s):  
Iron Oxide ◽  
Oxide Films ◽  
Oxidation Reduction ◽  
Iron Oxide Films

Designing micro-nano structure of anodized iron oxide films by metallographic adjustment on T8 steel

2021 ◽  
Author(s):  
Jinwei Cao ◽  
Qidi Gu ◽  
Nan Gao ◽  
Fei Chen ◽  
Congqian Cheng ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Oxide Films ◽  
Nano Structure ◽  
Iron Oxide Films

scholarly journals Symmetry-Induced Structuring of Ultrathin FeO and Fe3O4 Films on Pt(111) and Ru(0001)

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 719
Author(s):  
Natalia Michalak ◽  
Zygmunt Miłosz ◽  
Gina Peschel ◽  
Mauricio Prieto ◽  
Feng Xiong ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Single Crystal ◽  
High Vacuum ◽  
Oxide Films ◽  
Ultra High Vacuum ◽  
Mutual Orientation ◽  
High Catalytic Activity ◽  
Plane Orientation ◽  
Metal Single Crystal ◽  
Iron Oxide Films

Iron oxide films epitaxially grown on close-packed metal single crystal substrates exhibit nearly-perfect structural order, high catalytic activity (FeO) and room-temperature magnetism (Fe3O4). However, the morphology of the films, especially in the ultrathin regime, can be significantly influenced by the crystalline structure of the used support. This work reports an ultra-high vacuum (UHV) low energy electron/synchrotron light-based X-ray photoemission electron microscopy (LEEM/XPEEM) and electron diffraction (µLEED) study of the growth of FeO and Fe3O4 on two closed-packed metal single crystal surfaces: Pt(111) and Ru(0001). The results reveal the influence of the mutual orientation of adjacent substrate terraces on the morphology of iron oxide films epitaxially grown on top of them. On fcc Pt(111), which has the same mutual orientation of adjacent monoatomic terraces, FeO(111) grows with the same in-plane orientation on all substrate terraces. For Fe3O4(111), one or two orientations are observed depending on the growth conditions. On hcp Ru(0001), the adjacent terraces of which are ‘rotated’ by 180° with respect to each other, the in-plane orientation of initial FeO(111) and Fe3O4(111) crystallites is determined by the orientation of the substrate terrace on which they nucleated. The adaptation of three-fold symmetric iron oxides to three-fold symmetric substrate terraces leads to natural structuring of iron oxide films, i.e., the formation of patch-like magnetite layers on Pt(111) and stripe-like FeO and Fe3O4 structures on Ru(0001).

Obtaining Iron-Oxide Films on Sapphire Substrates

2018 ◽  
Vol 44 (6) ◽  
pp. 535-537
Author(s):  
Yu. V. Klunnikova ◽  
S. P. Malyukov ◽  
A. V. Sayenko ◽  
D. A. Sarychev ◽  
V. V. Kitaev
Keyword(s):  
Iron Oxide ◽  
Oxide Films ◽  
Sapphire Substrates ◽  
Iron Oxide Films
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