Reaction at the Outermost Surface Selectively Induced by Metastable-Atom Beams
Reaction at the Outermost Surface Selectively Induced by Metastable-Atom Beams
复制标题
亚稳态原子束选择性诱导最外表面反应
DOI：
10.1143/jjap.39.4126
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Harada
中科院分区：
文献类型：
--
作者：
H. Yasufuku;Kazuyuki Meguro;K. Okudaira;N. Ueno;Y. Harada
本文报告了首次对表面电子态变化的光谱观察，这些变化源自最外层表面的化学反应，该化学反应是由慢速亚稳态原子的影响选择性引发的。使用亚稳态原子电子能谱，观察到石墨基板上定向 OTiPc 单层分子因慢 He*(23S) 的影响而发生的结构变化，其中分子平坦取向，氧原子突出在表面之外。与光子和电子不同，亚稳态原子不会渗透到固体中。因此，它们仅与分布在薄膜最外表面的电子相互作用，并选择性地激发这些电子。亚稳原子电子能谱中观察到的光谱变化表明，表面反应可以通过慢速亚稳原子的撞击使最外层表面选择性电离来实现。
This paper reports the first spectroscopic observation of changes in surface electronic states that originate from a chemical reaction at the outermost surface which is selectively induced by the impact of slow metastable atoms. Using metastable-atom electron spectroscopy, structural changes of titanyl phthalocyanine (OTiPc) molecules as a result of the impact of slow He*(23S) were observed for an oriented OTiPc monolayer on a graphite substrate where the molecule is oriented flat with the oxygen atom protruding outside the surface. Unlike photons and electrons, metastable atoms do not penetrate into the bulk of solids. Therefore, they interact only with electrons distributed at the outermost surface of the film, and excite these electrons selectively. The observed spectral change in metastable-atom electron spectrum indicates that the surface reaction can be realized by the selective ionization of the outermost surface with the impact of slow metastable atoms.