Formation of Nanostructures at Ionic Liquid Electrochemical Interfaces

本论文主要从离子液体的电化学性质出发，在纳米尺度上研究阴、阳离子在Au电极表面的吸附行为。采用循环伏安法研究了双（三氟甲基磺酰基）酰亚胺基离子液体烷基甲基咪唑阳离子的烷基链长度对低折射率Au单晶电极电位窗口的影响。发现双电层区域的电势窗口依赖于Au的晶体学取向，这表明在Au衬底上的阳离子吸附强度的差异。EC-STM显示酞菁和多环芳烃分子在Au（111）表面的吸附具有清晰的分子分辨率。

In the present study, we focused on electrochemistry of ionic liquids to understand adsorption of anions and cations on Au electrode surface at nano-scale level. The influence of the alkyl chain length of the bis(trifluoromethylsulfonyl) imide-based ionic liquids alkyl-methylimidazolium, cation on the potential window was investigated with low-index Au single crystal electrodes by cyclic voltammetry. The potential window of the electrical double-layer region was found to depend on the crystallographic orientation of Au, which indicated a difference in the strength of cation adsorption on the Au substrate. EC-STM revealed that molecular adlayers of phthalocyanine and polycyclic aromatic hydrocarbons on Au(111) with clear molecular resolutions.