Growth of Fe3O4(001) thin films on Pt(100): Tuning surface termination with an Fe buffer layer

被引：28
|
作者：
Davis, Earl M. [1 ]
Zhang, Ke [1 ]
Cui, Yi [1 ]
Kuhlenbeck, Helmut [1 ]
Shaikhutdinov, Shamil [1 ]
Freund, Hans-Joachim [1 ]
机构：
[1] Max Planck Gesell, Fritz Haber Inst, Abt Chem Phys, D-14195 Berlin, Germany
来源：
SURFACE SCIENCE | 2015年 / 636卷
关键词：
Thin films; Iron oxides; Surface reconstruction; CATALYSIS; WATER; STM;
D O I：
10.1016/j.susc.2015.02.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We studied the preparation of well-ordered thin Fe3O4(001) films on a metallic substrate, Pt(100), using LEED and STM. The results show that film growth either by Fe reactive deposition in oxygen or by deposition-oxidation cycles onto pure Pt(100) results primarily in (111)-oriented surfaces. To grow Fe3O4(001) films, the preparation must include deposition of an Fe buffer layer as previously suggested for the growth of Fe3O4(001) on MgO(001) (Spiridis et al. Phys. Rev. B 74 (2006) 155423). Two stable (so called "dimer"- and B-layer) surface terminations were observed, both exhibiting a (root 2 x root 2)R45(0) reconstruction. Several intermediate, Fe-rich terminations were observed during the annealing process of an initially dimer-like structure. The process critically depends on the thickness of the buffer layer, which can be used as a tuning parameter for surface structures. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：42 / 46
页数：5
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