Oxygen adsorption on surfaces studied by a spin- and alignment-controlled O2 beam

IF 8.7 2区工程技术 Q1 CHEMISTRY, PHYSICAL Progress in Surface Science Pub Date : 2016-02-01 DOI:10.1016/j.progsurf.2016.03.001

Mitsunori Kurahashi

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引用次数: 21

Abstract

Molecular oxygen (O₂) is a paramagnetic linear molecule, yet the effect of its molecular alignment and electron spin on the dynamics of O₂ adsorption has remained unclear. Recently, it has been however shown that the use of magnetic hexapolar field allows us to prepare a single spin-rotational state [( $J, M$ ) = (2, 2)] selected O₂ beam for which both the molecular alignment and the spin state of O₂ are well defined. State-resolved studies of O₂ sticking on Si(1 0 0), Al(1 1 1), Ni(1 1 1) surfaces conducted with this beam have clarified that the O₂ sticking probability depends strongly on the molecular alignment and the spin orientation of O₂ relative to the surface. The mechanism of O₂ adsorption on Al(1 1 1) has been disputed in the past few decades, but the observed steric effect has provided a reasonable picture for it. The preparation method of the state-selected O₂ beam and its application to the alignment- and spin-resolved O₂ sticking studies are reviewed.

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用自旋和对准控制的氧束研究表面上的氧吸附

分子氧(O2)是一种顺磁性线性分子，其分子排列和电子自旋对氧吸附动力学的影响尚不清楚。然而，最近有研究表明，利用磁六极场可以制备单自旋态[(J,M) =(2,2)]的O2束，其中O2的分子取向和自旋态都得到了很好的定义。用该光束对O2在Si(10 0 0)、Al(11 11 1)、Ni(11 11 1)表面上的粘附进行了状态分辨研究，表明O2的粘附概率很大程度上取决于分子排列和O2相对于表面的自旋取向。在过去的几十年里，对氧在Al(1111)上的吸附机理一直存在争议，但观察到的空间效应为其提供了一个合理的图景。综述了状态选择O2束的制备方法及其在定向和自旋分辨O2粘着研究中的应用。

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来源期刊

Progress in Surface Science 工程技术-物理：凝聚态物理

CiteScore

11.30

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Progress in Surface Science publishes progress reports and review articles by invited authors of international stature. The papers are aimed at surface scientists and cover various aspects of surface science. Papers in the new section Progress Highlights, are more concise and general at the same time, and are aimed at all scientists. Because of the transdisciplinary nature of surface science, topics are chosen for their timeliness from across the wide spectrum of scientific and engineering subjects. The journal strives to promote the exchange of ideas between surface scientists in the various areas. Authors are encouraged to write articles that are of relevance and interest to both established surface scientists and newcomers in the field.

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