Elementary surface photo-induced reactions : Study by laser and surface spectroscopy

基本表面光诱导反应：激光和表面光谱研究

• 批准号: 04045011
• 负责人: KAWASAKI Masahiro
• 金额: $ 3.07万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04045011/
• 关键词: Surface-phase; Adsorbed molecule; Laser-induced Fluorescence; Photodissociation; OCS; Photoirradiatoin; Cl; GaAs; 表面光分解; 表面配向; トリメチルインジウム; 一酸化窒素; 半導体; トリメチルガリウム; ダイナミックス; ジメチルアルミニウムハイドライド; X線光電子分光法; 分解; シリコン基板; 解離吸着; メチル基; レーザー光; アルミ

Surface photochemistry concerns photoinduced processes at gas-solid interfaces. This year, we have investigated desorption, dissociation, and reaction of adsorbed molecules initiated by ultraviolet photoirradiation. Especially we compare the experimental results between gas- and surface-phase. Since carbon monoxide has been a pet molecule to surface scientists, CO was detected by laser-induced fluorescence technique, which came from the 230 nm photodissociation of OCS.Our results are different from those reported by our counter scientist Prof.Houston of Cornell Univcersity. Based on discussion, our conclusion is that a) we have to determine the electronic state and molecular structure of the photoprepared OCS,and b) photodissociation of OCS adsorbed on a surface will be helpful to interpret the discrepancy between our and their results. In Hokkaido, we have constructed a surface photodissociation machine to continue the OCS photodissociation. In cooperation with Prof. Ho of Cornell University, we have studied photoirradiation effect on Cl-atom-etched GaAs substrates and found significant wavelength effect.

表面光化学涉及在气体固定界面上的光诱导过程。今年，我们研究了通过紫外线光照射引发的吸附分子的解吸，解离和反应。特别是我们比较气体和表面相之间的实验结果。由于一氧化碳一直是表面科学家的PET分子，因此通过激光诱导的荧光技术检测到CO，该技术来自OC的230 nm光解相应。基于讨论，我们的结论是a）我们必须确定光编制OCS的电子状态和分子结构，b）吸附在表面上的OC的光解离会有助于解释我们与其结果之间的差异。在北海道，我们构建了一台表面光解离机，以继续OCS光解离。与康奈尔大学HO教授合作，我们研究了对Cl-Atom蚀刻GAAS底物的光映射效应，并发现了显着的波长效应。

项目成果

K.Tonokura: "Photodissociation of ICl at 235-248 nm." J.Chem.Phys.99. 3461-3467 (1993)

K.Tonokura：“ICl 在 235-248 nm 处的光解离。”

S.Mizuno, H.Tochikawa, T.Kawamura: "Alkali-metal adsorption on dissimilar alkali-metal monolayrs preadsorbed on Cu (001)" Phys.Rev.B50. 17540-17546 (1994)

S.Mizuno、H.Tochikawa、T.Kawamura：“预吸附在 Cu (001) 上的不同碱金属单分子层上的碱金属吸附”Phys.Rev.B50。

K.Mukasa, H.Hasegawa, Y.Tazuke, K.Sueoka, M.Sasaki, K.Hayakawa: "Exchange interaction between magnetic moments of ferromagnetic sample and tip" Jpn. J. Appl. Phys.33. 2692-2695 (1994)

K.Mukasa、H.Hasekawa、Y.Tazuke、K.Sueoka、M.Sasaki、K.Hayakawa：“铁磁样品和尖端的磁矩之间的交换相互作用”Jpn。

S.Mizuno, H.Tochikawa, T.Kawamura: "Alkali-metal adsorption on dissimilar alkali-metal monolayers preadsorbed on Cu(001)" Phys. Rev.B50. 17540-17546 (1994)

S.Mizuno、H.Tochikawa、T.Kawamura：“预吸附在 Cu(001) 上的不同碱金属单层上的碱金属吸附” Phys。

M.Abe, Y.Inagaki, L.L.Springsteen, Y.Matsumi, M.Kawasaki: "Collisional excitation of CO molecules by O ('D) atoms" J.Phys.Chem.98. 12641-12645 (1994)

M.Abe、Y.Inagaki、L.L.Springsteen、Y.Matsumi、M.Kawasaki：“O (D) 原子对 CO 分子的碰撞激发”J.Phys.Chem.98。