Microscopic Mechanisms of Chemical Reactions on Semiconductor Surface

半导体表面化学反应的微观机制

• 批准号: 11305005
• 负责人: NISHIJIMA Mitsuaki
• 金额: $ 25.79万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11305005/
• 关键词: STM; EELS; silicon; diamond; surface reaction; single crystal; 真空; 半導体表面; 表面

1. Study on the diamond surfaceThe structure, electronic states, vibrational states and chemical reactivity of the C(100) surface have been studied by low-energy electron diffraction, high resolution electron energy loss spectroscopy and thermal desorption spectroscopy. In particular, the Diels-Alder reaction was observed to occur on C(100) for the first time. Extending the present works, it can be predicted that any other conjugated dienes with suitable symmmetry react with the C(100) surface.2. Study on the silicon surface(1) The surface phonons of the Si(100)(2x1) surface have been studied by the use of high resolution electron energy loss spectroscopy. Losses related to the surface dimer motions are observed. In particular, the 20 meV loss attributed to the dimer-rocking mode asociated with the dimer buckling was observed for the first time. The Rayleigh phonons are observed in resonance with the projected density of states of bulk phonons. Comparison between the experimental results and lattice dynamical calculations were made.(2) The oxygen-Si(111)7x7 surface interactions were studied, by the use of scanning tunneling microscopy, in the temperature region between 10 and 300 K. New informations were obtained on the behaviors of unstable reaction intermediates.

1.金刚石表面研究通过低能电子衍射、高分辨率电子能量损失谱和热脱附光谱研究了C(100)表面的结构、电子态、振动态和化学反应性。特别是，首次观察到 C(100) 上发生了 Diels-Alder 反应。扩展目前的工作，可以预测任何其他具有合适对称性的共轭二烯都会与C(100)表面发生反应。2．硅表面的研究(1)利用高分辨率电子能量损失谱研究了Si(100)(2x1)表面的表面声子。观察到与表面二聚体运动相关的损失。特别是，首次观察到与二聚体屈曲相关的二聚体摇摆模式导致的 20 meV 损失。瑞利声子是在与体声子的投影态密度共振的情况下观察到的。 (2)利用扫描隧道显微镜研究了10~300 K温度范围内的氧-Si(111)7x7表面相互作用,获得了新的信息。不稳定反应中间体的行为。

项目成果

H.Yanagita: "Vilrational spectra 7 H on Rh(111)"Surf. Sci.. 441. 507-514 (1999)

H.Yanagita：“Rh(111) 上的 Virrational 光谱 7 H”Surf。

M.Z.Hassain: "Surface Phonons, electronic structure and chemical reactivity of C(100)2x1"Jpn. J. Appl. Phys.. 38. 6659-6666 (1999)

M.Z.Hassain：“C(100)2x1 的表面声子、电子结构和化学反应性”Jpn。

M.Z. Hossain: "Adsorbed States of K on the Diamond (100)2x1 Surface"Diamond Relat. Mater.. 9. 162-169 (2000)

M.Z.

M.Z.Hossain: "Chemisorption of O_2 and CO m K-modified C(100)"Diamond Relat. Mater.. 10. 2049-2056 (2001)

M.Z.Hossain：“K-modified C(100) 中 O_2 和 CO 的化学吸附”Diamond Relat。

H.Okuyama: "Overtones of H vibrations at Ni(111)"Phys.Rev.B. 63. 233403-1-233403-4 (2001)

H.Okuyama：“Ni(111) 处 H 振动的泛音”Phys.Rev.B。