Development of Angle-Resolved Electron-Stimulated Desorption Spectrometer and its Application to be Detection of Excited Species on Surfaces

角分辨电子受激解吸光谱仪的研制及其在表面激发态物质检测中的应用

基本信息

批准号：
03554015
负责人：
IWASAWA Yasuhiro
金额：
$ 6.91万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03554015/
关键词：
Electron stimulated desorption Solid surface Adsorption Ru CO ルテニウム一酸化炭素

项目摘要

We have constructed a novel ion spectrometer, named time-of-flight Fourier-transform ion spectrometer (TOFFTIS), which has significantly high detection efficiency and high enegy resolution at very low energies. The TOFFTIS has been mounted on an ultrahigh-vacuum compatible two-axis rotation assembly and installed in an ultrahigh-vacuum chamber. As a prelimainary experiment, electron-stimulated desorption of O^+ and CO^+ has been successfully obtained, demonstrating that TOFFTIS has a performance as expected.By using TOFFTIS as a high-efficiency ion detector, we have developed a new experimental technique named angle-resolved electron-stimulated desorption spectroscopy (ARESDS) to investigate the dynamic behavior of excited species adsorbed 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/changed-particle lithogaphy, are based essentially on the surface chemical processes. The new technique utilizes the desorption of ions induced by electronic excitation by impinging electrons. The ions desorbed upon electronic excitations are known to carry rich information about the adsorption state of the parent molecules adsorbed on the surface. Detailed analysis of desorbed ions will provide quantitative description of the potential energy surface, both of ground and excited states. We have also studied on the coadsorption of carbon monoxide with methylamine and acetylene, the chemical modification of Mo(112) by chemisorbed oxygen atoms.

我们已经构建了一个新型的离子光谱仪，称为飞行时间傅立叶转变离子光谱仪（TOFFTIS），该光谱仪在非常低的能量下具有显着高的检测效率和高度分辨率。 Tofftis已安装在兼容的两轴旋转组件上，并安装在超高空间室中。作为一个初步实验，已经成功获得了电子刺激的O^+和CO^+的解吸，证明Tofftis具有预期的性能。通过将Tofftis作为高效离子检测器，我们已经开发了一种新的实验技术，名为Angle-Engle-Elect-Elect-Elect-Election-Elect-Election-Sigh-Sigh-Sign刺激的分解分析光谱（areSesd）进行了脉络范围，以对固体进行了竞争的AD ADSERITOR，以研究动态行为。如今，真正需要对化学反应机制的基本理解，因为先进的材料技术（例如分子梁外延，有机金属化学蒸气沉积和X射线/变化的颗粒岩性）基本上基于表面化学过程。新技术利用通过撞击电子引起的电子激发引起的离子的解吸。已知在电子激发上解吸的离子可传递有关在表面吸附的父分子的吸附状态的丰富信息。解吸离子的详细分析将提供对势能表面的定量描述，包括地面和激发态。我们还研究了一氧化碳与甲胺和乙炔的共吸附，化学吸附氧原子对MO（112）的化学修饰。