Study of Surface Adsorption Mechanism by Core-level Deexcitation Spectroscopy
芯级去激发光谱研究表面吸附机制
基本信息
- 批准号:07640769
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Adsorption of molecules on solid surefaces can be viewed as a elemental process of various surface reactions such as catalytic reactions, thus it is very important to elucidate the details of the microscopic mechanism of adsorption process. When a molecule adsorbs on a surface, the adsorption bonding orbital should be formed through the hybridization between the orbitals of the molecule and the surface, and it is essentially important to investigate the hybridization mechanism to elucidate the mechanism of adsorption process. Usually, the adsorption bonding levels are studied with photoemission spectroscopy, however, the adsorption level is inevitably overlapped with the bulk band emissions in the photoemission spectra and it is difficult to resolve adsorptioh bonding levels. The purpose of this work is to develop the method to observe the adsorption bonding levels selectively by the use of core-level deexciation spectroscopy.As the TiC (111) surface is exposed to oxygen, oxygen is adsorved dissociatively forming (1x1) overlayr. As the photoemission spectrum is measured under the conditiuon where Ti3p-3dexcitation occurs, it has been found that the O2p^Ti 3dadsorption level is resonantly enhanced to become main peak in the valence band spectra. Thus it is proved that adsorption bonding level can be selectively measured using core-level deexcitation spectroscopy. It is known that the alkali metal induced bonding level is difficult to observe due to the small cross section, . However it is proved that the bonding level can be selectively observed by the use obcore-level deexcitation spectroscopy.
分子在固体表面上的吸附可以被视为催化反应等各种表面反应的基本过程,因此阐明吸附过程的微观机制的细节非常重要。当分子吸附在表面时,吸附键合轨道应通过分子轨道与表面的杂化形成,研究杂化机理对于阐明吸附过程的机理具有重要意义。通常,利用光电子能谱研究吸附键能级,然而,吸附能级不可避免地与光电子能谱中的体能带发射重叠,并且很难解析吸附键能级。这项工作的目的是开发一种利用核级去激光谱选择性观察吸附键合水平的方法。当 TiC (111) 表面暴露于氧气时,氧气被解离吸附形成 (1x1) 覆盖层。在Ti3p-3激发条件下测量光电发射光谱,发现O2p^Ti 3d吸附能级共振增强,成为价带光谱的主峰。由此证明,利用核级去激发光谱可以选择性地测量吸附键合水平。已知碱金属诱导的键合水平由于横截面小而难以观察。然而,事实证明,使用obcore水平去激发光谱可以选择性地观察键合水平。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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EDAMOTO Kazuyuki其他文献
EDAMOTO Kazuyuki的其他文献
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{{ truncateString('EDAMOTO Kazuyuki', 18)}}的其他基金
Growth and characterization of strongly correlated suboxide thin films
强相关低氧化物薄膜的生长和表征
- 批准号:
16K05409 - 财政年份:2016
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Growth of single-crystal films of suboxides on the surfaces of refractory metals with a cubic system
立方系难熔金属表面低氧化物单晶薄膜的生长
- 批准号:
22550127 - 财政年份:2010
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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