Experimental comparison between microscopic energy dissipation and inelastic molecular scattering from surfaces

微观能量耗散与表面非弹性分子散射的实验比较

• 批准号: 15510087
• 负责人: SASAKI Masahiro
• 金额: $ 2.43万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510087/
• 关键词: non-contact atomic force microscope(nc-AFM); energy dissipation; surface reaction; supersonic molecular beam; inelastic molecular scattering; monolayer graphite; hydrocarbons; alkans; 炭化水素; グラファイト

The purpose of this study is to experimentally compare the microscopic mechanical energy dissipation during the observation with a non-contact atomic force microscope(nc-AFM) and the feature of the inelastic scattering of molecules from surfaces, and eventually to clarify the origin of the microscopic energy dissipation, which can be utilized to locally control the surface chemical reaction.The microscopic mechanical energy dissipations on a carbon material-partially deposited Pt(111) surface are successfully evaluated with a nc-AFM equipped with an amplitude stabilized catilever excitation by automatically compensating the contact potential difference between tip and sample surfaces which induces electric energy dissipation.On the other hand, for the evaluation of the energy dissipation with molecular beam scattering techniques, the highly oriented monolayer graphite (MG)-covered Pt(111) surface is prepared by a supersonic methane beam irradiation. The angular and velocity distributions of supersonic Ne,Ar,methane and ethane molecules scattered from clean and MG-covered Pt(111) surfaces are well explained within the framework of the classical hard cube model unless the rotational states of molecules are excited during scattering. This suggests that the contrast of the microscopic energy dissipation distribution image is due to the difference in the effective mass of the surface materials. However, the absolute values of the energy dissipations obtained from two methods are found to be largely different. The theoretical study is required to quantitatively clarify the origin of the microscopic energy dissipation.

这项研究的目的是通过非接触式原子力显微镜（NC-AFM）进行实验比较显微镜的机械能耗散，以及分子对表面的无弹性散射的特征，并最终阐明了微观能量的范围，以阐明微观能量的机构，以便在表面上可以解散微观的反应。通过配备有振幅稳定的catilever激发的NC-AFM成功评估了材料的PT（111）表面，通过自动补偿尖端和样品表面之间的接触电位差异，从而诱导电能散发，以用分子束散射（高度）散射（Monolayerique）（Monoryerecrient）（Monoryerecrient）（Modique）（Monolayerecrient）（Mororay）（Mororayerere）（Moderecrede）（Mororay），MororeREAREREREREDIDERIDED（MORERAYEREREDIDE）（MORERAYEREREDEREDEREDEREDEREDERICE）表面是通过超音速甲烷束照射制备的。在经典硬化立方体模型的框架内很好地解释了从清洁和MG覆盖的PT（111）表面散布的超音速NE，AR，甲烷和乙烷分子的角和速度分布，除非分子的旋转状态在散射过程中激发。这表明微观能量耗散分布图像的对比是由于表面材料的有效质量差异所致。但是，发现从两种方法获得的能量耗散的绝对值在很大程度上有所不同。需要进行理论研究以定量阐明微观能量耗散的起源。

项目成果

Effect of Translational energy effect of CH_4 molecules on the formation of monolayer graphite on Pt(111)(in Japanese)

CH_4分子的平移能量效应对Pt(111)上单层石墨形成的影响（日文）

• 发表时间: 2004
• 期刊: Shinku 47
• 作者: 佐々木清一;菱谷智幸;K.Miya et al.;H.Ueta et al.
• 通讯作者: H.Ueta et al.

Pt(111)表面での単原子層グラファイト形成におけるCH4分子線並進エネルギーの影響

CH4分子束平移能对Pt(111)表面单原子层石墨形成的影响

• 发表时间: 2004
• 期刊: 真空 47
• 作者: 佐々木清一;菱谷智幸;D.Mori et al.;佐々木清一;T.Kondo et al.;S.Sasaki;H.Ueta 他;植田寛和 他
• 通讯作者: 植田寛和 他

Highly oriented monolayer graphite formation on Pt(111) by a supersonic methane beam

• DOI: 10.1016/j.susc.2004.04.039
• 发表时间: 2004-07
• 期刊: Surface Science
• 影响因子: 1.9
• 作者: H. Ueta;M. Saida;C. Nakai;Y. Yamada;M. Sasaki;Shigehiko Yamamoto

Dynamics of inelastic scattering of C_2H_6 from Pt(111) surfaces covered with monolayer graphite(in Japanese)

单层石墨覆盖的 Pt(111) 表面 C_2H_6 非弹性散射动力学（日文）

• 发表时间: 2004
• 期刊: Shinku 47
• 作者: 佐々木清一;菱谷智幸;D.Mori et al.
• 通讯作者: D.Mori et al.

Pt(111)表面での単原子層グラファイト形成におけるCH_4分子線並進エネルギーの影響

CH_4分子束平移能对Pt(111)表面单原子层石墨形成的影响

• 发表时间: 2004
• 期刊: 真空 47
• 作者: H.Ueta 他;K.Miya 他;植田寛和 他
• 通讯作者: 植田寛和 他