A Study on the Structure of Metastable Reaction Intermediates on Solid Surfaces and the Elementary Reaction Processes

固体表面亚稳态反应中间体的结构及基本反应过程研究

• 批准号: 02453007
• 负责人: IWASAWA Yasuhiro
• 金额: $ 4.93万
• 依托单位: the University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02453007/
• 关键词: Solid Surface; Reaction Intermediate; Electron Stimulated Desorption; Ruthenium; Carbon Monoxide; 表面反応; レ-ザ-誘起脱離; 電子エネルギ-損失分光; 低速電子回折; 共吸着

We have developed a new experimental technique to investigate the dynamic behavior of the metastable reaction intermediates on solid surfaces. Today, the basic understanding of the mechanism of chemical reactions on solid surfaces is truly demanded, since the advanced material technology, such as molecular-beam epitaxy, organometallic chemical-vapor deposition and X-ray/charged-particle lithography, are based essentially on the surface chemical processes. The new technique is utilizing the desorption of ions induced by electronic excitations by impinging electrons. The ions desorbed upon electronic excitations are known to carry rich information about the adsorption state of the parent admolecules on the surface. Detailed analysis of desorbed ions will provide quantitative description of the potential energy surface, both of a ground state and excited states, of adsorbates.We have constructed a novel ion spectrometer, called time-of-flight Fourier-transform ion spectrometer (TOFFTIS), which has significantly high detection efficiency and high energy resolution at very low energies. The TOFFTIS has been mounted on an ultrahigh-vacuum Compatible 2-axis rotation assembly and installed in a ultrahigh vacuum chamber. As a preliminary experiment, electron-stimulated desorption of O^+ and CO^+ from CO/Ru(001) has been investigated. Translational energy distribution of O^+ and CO^+ has been successfully obtained, demonstrating that TOFFTIS has a performance as expected.

我们发展了一种新的实验技术来研究亚稳态反应中间体在固体表面上的动力学行为。今天，真正需要对固体表面上的化学反应机理的基本理解，因为先进的材料技术，如分子束外延，有机金属化学气相沉积和X射线/带电粒子光刻，本质上是基于表面化学过程。新技术是利用由撞击电子的电子激发引起的离子解吸。已知在电子激发下脱附的离子携带有关表面母体吸附分子吸附状态的丰富信息。通过对解吸离子的详细分析，可以定量描述吸附物基态和激发态的势能面，我们研制了一种新型的飞行时间傅里叶变换离子谱仪（TOFFTIS），它在很低的能量下具有很高的探测效率和能量分辨率。TOFFTIS已安装在超高真空兼容2轴旋转组件上，并安装在真空室中。作为初步实验，我们研究了O^+和CO^+在CO/Ru（001）上的电子激发脱附。成功地获得了O^+和CO^+的平动能分布，表明TOFFTIS具有预期的性能。

项目成果

T.Aruga,K.Fukui,and Y.Iwasawa: ""Oon Mo(112):Modification of Surface Electronic Structure and Control of Reaction Path"" J.Amer.Chem.Soc.

T.Aruga、K.Fukui 和 Y.Iwasawa：“Oon Mo(112)：表面电子结构的修饰和反应路径的控制”J.Amer.Chem.Soc。

T.Aruga,T.Sasaki,Y.Iwasawa: "Interacion between donors and acceptors on metal surfaces" in“Ordering at Surfaces and Interfaces",eds.A.Yoshimori et al.,SpringerーVerlag. (1991)

T. Aruga、T. Sasaki、Y. Iwasawa：“金属表面上的供体和受体之间的相互作用”，《表面和界面的排序》，A. Yoshimori 等人，Springer-Verlag。

T.Sasaki,T.Aruga,H.Kuroda,Y.Iwasawa: "Coadsorption of CO and methylamine on Ru(001):Effect of coadsorbed CO on dissociation paths of methylamine" Surf.Sci.

T.Sasaki、T.Aruga、H.Kuroda、Y.Iwasawa：“CO 和甲胺在 Ru(001) 上的共吸附：共吸附 CO 对甲胺解离路径的影响”Surf.Sci。

T.Aruga,F.Kawada,and Y,Iwasawa: ""Time-of-Flight Fourier-Transform Ion Spectrometer"" Rev.Sci.Instrum.

T.Aruga、F.Kawada 和 Y,Iwasawa：““飞行时间傅立叶变换离子光谱仪””Rev.Sci.Instrum。

T.Aruga,K.Fukui,and Y.Iwasawa: "″Oon Mo(112):Modification of Surface Electronic Structure and Control of Reaction Path″" J.Amer.Chem.Soc.

T.Aruga、K.Fukui 和 Y.Iwasawa：““Oon Mo(112)：表面电子结构的修饰和反应路径的控制””J.Amer.Chem.Soc。