Formation of Nanostructures at Ionic Liquid Electrochemical Interfaces

在本研究中，我们将重点放在离子液体的电化学上，以了解阴离子和阳离子在金电极表面的纳米级吸附。用低指数金单晶电极循环伏安法研究了双(三氟甲基磺酰亚胺)基离子液体烷基-甲基咪唑阳离子的烷基链长对电势窗口的影响。双电层区域的电势窗口取决于Au的晶体取向，这表明阳离子在Au衬底上的吸附强度不同。EC-STM研究表明，在Au(111)面上，酞菁和多环芳烃分子层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.