Formation of Surfaces and Interfaces Designed at Atomic/Molecular Level

了解发生在电极表面的现象，如金属沉积和有机分子的吸附，对于工业应用，包括器件的开发是至关重要的。我们在2001财政年度取得了以下成果。1)溶液中铜在Pd(111)表面的欠电位沉积和体相沉积：在一步欠电势沉积和体相沉积过程中，硫酸盐离子始终存在于Pd和Cu表面。2)溶液中菲在银单晶表面的吸附结构：在银(111)、银(100)、银(110)表面吸附了菲，其吸附结构分别为(2[平方根]3×2[平方根]3)R30°，c(4×6)，c(4×4)。3)碱性溶液中CN在Ir(111)表面的附着层：CN的附着层结构为(2[平方根]3×2[平方根]3)R30°结构，由CN的六元环单元组成，环中发生了Na~+的络合作用。4)溶液中冠烯在Au(111)表面的附着层：冠烯附着层是在苯溶液中浸泡在Au(111)衬底上形成的，在其上形成高度有序的(4×4)对称性的冠烯附着层。5)溴在Ag(100)表面的附着层结构和AgBr在Ag(100)表面的形成：在Ag(100)表面形成了c(2×2)晶格，在其上外延生长了AgBr层。6)超高真空中对二甲苯在Rh(111)表面的形成过程：对二甲苯在Rh(111)表面逐渐生长，形成c(4×2[平方根]3)矩形结构。如上所述，我们成功地在液体和真空环境中对金属表面和界面进行了原子级修饰，优化了电极电位和蒸汽压等参数。

Understanding the phenomena that occur on electrode surfaces such as deposition of metals and adsorption of organic molecules is essential to the industrial applications including the development of devices. We obtained the following results in the fiscal year 2001. 1) Underpotential deposition (UPD) and bulk deposition of Cu onto Pd(111) in solution : during the UPD that occurred in one step and the bulk deposition, sulfate ions always existed on Pd and Cu surfaces. 2) Adlayer structures of anthracene on Ag single-crystal surfaces in solution : anthracene were adsorbed on Ag(111), Ag(100), Ag(110) surfaces, and the adlayer structures were assigned as (2【square root】3 x 2【square root】3)R30°, c(4 x 6), and c(4 x 4), respectively. 3) Adlayers of CN on Ir(111) in alkaline solution : the adlayer structure of CN forming a (2【square root】3 x 2【square root】3)R30° structure were found to consist of units of 6-membered rings of CN, and the complexation of Na^+ took place in the rings. 4) Adlayers of coronene on Au(111) surface in solution : the adlayer of coronene was formed in benzene solution by immersing a Au(111) substrate, on which a highly ordered adlayer of coronene was formed in a (4 x 4) symmetry. 5) Adlayer structure of Br on Ag(100) surface and the formation of AgBr on Ag(100) : Br on Ag(100) formed a c(2 x 2) lattice, on which AgBr layers were epitaxially grown. 6) Formation processes of a p-xylene adlayer on Rh(111) surface in UHV : the adlayer of p-xylene grew gradually on Rh(111) surface to form a c(4 x 2【square root】3)rect structure, which was previously found to be formed in solution.As described above, we successfully modified metal surfaces and interfaces with an atomic level both in liquid and in vacuum environments, optimizing parameters such as an electrode potential and a vapor pressure.