Reaction in Two Dimensional Space at the Solid Surface. Control of Reaction Using the Metastable Atom as a Probe

1单层膜中的聚合反应在213 K下，用气相沉积法在石墨裂解面上制备了三十碳二炔（HTDY，C_<16>H_<33>C = CC=CC_<16>H_<33>）和二十四碳四炔（DTTY，HC=CC_<12>H_<24>C=CC=C-C_<12>H_<24>HC=C）的聚合反应膜。调查结果如下。(1)在213 K的石墨平面上，分子链平行于衬底取向。(2)通过紫外光照射，分子间发生聚合反应。对于HTDY，分子中心的两个三键参与反应，而对于DTTY，分子中心和末端的四个三键参与反应。(3)聚合反应的结果是在基底上形成单层分子片（或原子布）。2亚稳电子在二维空间中观察反应 ...更多信息 发射显微镜（1）为了更灵敏地探测分子扩散和反应，观察了表面局部区域的Penning电离电子能谱和能量过滤图像。前者提供了表面局部区域的分子取向和电子态的信息，而后者使我们能够映射表面的分子取向分布。本研究首次对能量滤波图像进行了观测。(2)本文研究了酞菁在石墨和MoS_2解理面上以及在硅单晶表面上的分子扩散和反应。结果表明：（a）在石墨上，分子扩散迅速，分子平面平行于衬底平面。(b)在MoS_2上，分子扩散缓慢，并且在加热衬底时平行于衬底取向，如（a）的情况。(c)在Si单晶表面上，分子与衬底反应并且没有观察到分子扩散。少

1 Polymerization Reaction in Monolayr FilmFilms of hexatriacontadiyne (HTDY,C_<16>H_<33> C=CC=CC_<16>H_<33>) and dotoriacontatetrayne (DTTY,HC=CC_<12>H_<24> C=CC=C-C_<12>H_<24>HC=C) were prepared by vapor deposition onto a graphite cleavage plane held at 213 K.The process of the reaction in the films induced by irradiation with ultraviolet light was monitored by Penning ionization electron spectroscopy (PIES). The following findings were made.(1) On the graphite plane at 213 K molecular chains are oriented parallel to the substrate.(2) Polymerization reaction proceed among molecules by UV irradiation. For HTDY the two triple bonds at the center of the molecule are involved in the reaction, where for DTTY the four triple bonds at the center and the ends of the molecule take part in the reaction.(3) The monolayr molecular sheet (or atomic cloth) is formed on the substrate as a result of the polymerization reaction.2 Observation of Reaction in Two Dimensional Space by Metastable Electron … More Emission Microscope(1) In order to probe the molecular diffusion and reaction sensitively, the Penning ionization electron spectrum of the surface in the local region and the energy-filtered image were observed. The former provides information on the molecular orientation and the electronic state in the local region of the surface, whereas the latter enables us to map the distribution of the molecular orientation at the surface. The observation of the energy-filtered image was carried out for the first time in this study.(2) The molecular diffusion and the reaction of phthalocyanines were studied on cleavage planes of graphite and MoS_2 as well as on a Si single crystal surface. The following findings were made : (a) On graphite molecules diffuse rapidly and orient with their molecular planes parallel to the substrate plane. (b) On MoS_2 molecules diffuse slowly and orient parallel to the substrate as in the case of (a) upon heating the substrate. (c) On the Si single crystal surface, molecules react with the substrate and no molecular diffusion is observed. Less