论文部分内容阅读
利用低温扫描隧道显微镜研究乙醇分子在半金属Bi(111)表面的吸附和自组装.在低覆盖度下,乙醇分子主要以单体和二聚体的形式吸附在衬底表面.随着覆盖度的增加,形成少量的分子链和大量结构稳定的六聚体结构.高覆盖度下的乙醇自组装结构经310K退火2h后,得到大面积的乙醇自组装薄膜.乙醇自组装薄膜的晶格常数是:a=630pm,b=380pm,θ=89°,这与乙醇晶体的晶格常数不同.乙醇自组装薄膜的形成得益于分子间的较强的相互作用,这种作用力可以主导分子与衬底间的作用.
Low temperature scanning tunneling microscope was used to study the adsorption and self-assembly of ethanol molecules on the semi-metallic Bi (111) surface. At low coverage, ethanol molecules mainly adsorbed on the surface of the substrate in the form of monomer and dimer. , A small amount of molecular chains and a large number of hexameric structure were obtained.The ethanol self-assembled films with large coverage were annealed at 310K for 2h to obtain a large area ethanol self-assembled films.The lattice constants Is: a = 630pm, b = 380pm, θ = 89 °, which is different from the lattice constant of ethanol crystals.The formation of ethanol self-assembled thin films is due to the strong intermolecular interaction that can dominate the molecule The role of the substrate.