依赖于步骤取向的氧化：从一维氧化物到二维氧化物
Step-orientation-dependent oxidation: from 1D to 2D oxides.
作者信息
Klikovits J, Schmid M, Merte L R, Varga P, Westerström R, Resta A, Andersen J N, Gustafson J, Mikkelsen A, Lundgren E, Mittendorfer F, Kresse G
机构信息
Institut für Allgemeine Physik, Technische Universität Wien, 1040 Wien, Austria.
出版信息
Phys Rev Lett. 2008 Dec 31;101(26):266104. doi: 10.1103/PhysRevLett.101.266104.
Using scanning tunneling microscopy and density functional theory, we have studied the initial oxidation of Rh(111) surfaces with two types of straight steps, having {100} and {111} microfacets. The one-dimensional (1D) oxide initially formed at the steps acts as a barrier impeding formation of the 2D oxide on the (111) terrace behind it. We demonstrate that the details of the structure of the 1D oxide govern the rate of 2D oxidation and discuss implications for oxidation of nanoparticles.
利用扫描隧道显微镜和密度泛函理论，我们研究了具有{100}和{111}微面的两种类型直台阶的Rh(111)表面的初始氧化过程。最初在台阶处形成的一维（1D）氧化物起到了屏障的作用，阻碍了其后方（111）台面上二维氧化物的形成。我们证明了一维氧化物的结构细节决定了二维氧化的速率，并讨论了其对纳米颗粒氧化的影响。
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