Interfacial Behavior of Thin Ionic Liquid Films on Mica

被引：58

作者：

Deyko, Alexey ^{[1
]}

Cremer, Till ^{[1
]}

Rietzler, Florian ^{[1
]}

Perkin, Susan ^{[2
]}

Crowhurst, Lorna ^{[3
]}

Welton, Tom ^{[3
]}

Steinrueck, Hans-Peter ^{[1
]}

Maier, Florian ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Phys Chem 2, D-91058 Erlangen, Germany

[2] Univ Oxford, Dept Chem, Oxford OX1 3QZ, England

[3] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 10期

关键词：

RAY PHOTOELECTRON-SPECTROSCOPY; ATOMIC-FORCE MICROSCOPY; ELECTRONIC-STRUCTURE; SURFACE-COMPOSITION; TETRAFLUOROBORATE; ORIENTATION; CATALYSIS; ULTRATHIN; SCILL; STM;

D O I：

10.1021/jp3115397

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ultrathin films of two imidazolium-based ionic liquids (ILs), [C(1)C(1)Im][Tf2N] (=1-methyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) and [C(4)C(1)Im][Tf2N] (=1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide) were deposited on mica surfaces by physical vapor deposition in ultrahigh vacuum. Using angle-resolved X-ray photoelectron spectroscopy (ARXPS), the initial wetting behavior, the growth characteristics, and the molecular arrangement of the ions at the interface were investigated. The measurements were performed on freshly air-cleaved mica surfaces with different carbon precoverages. ARXPS clearly reveals that the initial IL adsorption behavior strongly depends on the amount of preadsorbed carbon: On clean mica, 3D growth (complete dewetting) occurs, whereas on a fully carbon covered surface, initially a complete 2D wetting layer forms, followed by 3D growth.

引用

页码：5101 / 5111

页数：11

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