Adsorption of Solvent Cations on Au(111) and Au(100) in Alkylimidazolium-Based Ionic Liquids – Worm-Like versus Micelle-Like Structures
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Yu-Zhuan Su
Abstract
By employing high resolution in-situ STM, the adsorption of alkylimidazolium-based cations of EMI+, PMI+, BMI+ and OMI+ on Au(111) and Au(100) surfaces are investigated systematically. The cation adsorption on both Au(111) and Au(100) are composed of double rows arising from counter-facing imidazolium-based cation pairs. On Au(100), the double rows associated with the four cations show micelle-like appearance along the two √ 2 directions of the Au(100) surface lattice units. The width of the double rows varies depending on the side chain length of the cations, but is constrained by the periodicity along the √ 2 directions. Anions of BF4-, PF6-, CF3SO3- and Tf2N- do not influence the micelle-like adsorption structure. On Au(111), the double rows are formed only when the terraces are etched to several atoms wide. Most likely, the underneath Au surface experiences restructuring to accommodate the double row structure, and the worm-like orientation of the double rows is the consequence of strain release. Both the micelle-like and worm-like adsorption structures would be lifted upon cathodic potential excursions when the surfaces are driven to undergo ordinary Au(100)-hex and Au(111)-(√ 3 × 22) reconstructions. These results reveal that the ordered micelle-like structure on Au(100) and the irregular worm-like structure on Au(111) are of the same nature.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Artikel in diesem Heft
- Preface
- Building versus Structure Elements: Ionic Charge Carriers in Solids
- A Brief Review of Determinism in the Prediction of Localized Corrosion Damage
- La0.6Sr0.4CoO3-δ (LSC) Thin Film Electrodes with Very Fast Oxygen Reduction Kinetics Prepared by a Sol-Gel Route
- Nitrate Reduction on Platinum (111) Surfaces Modifiedl with Bi: Single Crystalsl and Nanoparticles
- Fundamental Investigation of the HER on a Pt(111) Surface at Temperatures down to 120K
- Impedance Spectra of Pt(100) in Aqueous H2SO4 and HCl Solutions Around the Hydrogen Adsorption-Desorption Peak
- Lifting of Thermally-Induced Surface Reconstruction on Au(100) Electrode by Protonated Molecules of Dopamine
- The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile
- Lead Underpotential Deposition on Pt-submonolayer Modified Au(111)
- Adsorption of Solvent Cations on Au(111) and Au(100) in Alkylimidazolium-Based Ionic Liquids – Worm-Like versus Micelle-Like Structures
- Measurements of the Potentials of Zero Free Charge and Zero Total Charge for 1-thio- ± bβ-D-glucose and DPTL Modified Au(111) Surface in Different Electrolyte Solutions
- Tert-Pentanol Adsorption on Ag(100) and Ag(110) from an Aqueous Solution and its Comparison with that on Ag(111), Hg, Ga and Bi(001)
- Tetrahedral Palladium Nanocrystals: A New Support for Platinum Monolayer Electrocatalysts with High Activity and Stability in the Oxygen Reduction Reaction
- Surface Modification of a n-Si(111) Electrode through Aldehyde Grafting and Subsequent Metallization: Theory and Experiment
- Ion Transfer Mechanisms Accompanying p-Doping of Poly(3,4-Ethylenedioxythiophene) Films in Deep Eutectic Solvents
- Adsorption of Additives: Hardness and Softness at Electrified Interfaces
Artikel in diesem Heft
- Preface
- Building versus Structure Elements: Ionic Charge Carriers in Solids
- A Brief Review of Determinism in the Prediction of Localized Corrosion Damage
- La0.6Sr0.4CoO3-δ (LSC) Thin Film Electrodes with Very Fast Oxygen Reduction Kinetics Prepared by a Sol-Gel Route
- Nitrate Reduction on Platinum (111) Surfaces Modifiedl with Bi: Single Crystalsl and Nanoparticles
- Fundamental Investigation of the HER on a Pt(111) Surface at Temperatures down to 120K
- Impedance Spectra of Pt(100) in Aqueous H2SO4 and HCl Solutions Around the Hydrogen Adsorption-Desorption Peak
- Lifting of Thermally-Induced Surface Reconstruction on Au(100) Electrode by Protonated Molecules of Dopamine
- The Under Potential Deposition of Cu on Au (111) in Nonaqueous Acetonitrile
- Lead Underpotential Deposition on Pt-submonolayer Modified Au(111)
- Adsorption of Solvent Cations on Au(111) and Au(100) in Alkylimidazolium-Based Ionic Liquids – Worm-Like versus Micelle-Like Structures
- Measurements of the Potentials of Zero Free Charge and Zero Total Charge for 1-thio- ± bβ-D-glucose and DPTL Modified Au(111) Surface in Different Electrolyte Solutions
- Tert-Pentanol Adsorption on Ag(100) and Ag(110) from an Aqueous Solution and its Comparison with that on Ag(111), Hg, Ga and Bi(001)
- Tetrahedral Palladium Nanocrystals: A New Support for Platinum Monolayer Electrocatalysts with High Activity and Stability in the Oxygen Reduction Reaction
- Surface Modification of a n-Si(111) Electrode through Aldehyde Grafting and Subsequent Metallization: Theory and Experiment
- Ion Transfer Mechanisms Accompanying p-Doping of Poly(3,4-Ethylenedioxythiophene) Films in Deep Eutectic Solvents
- Adsorption of Additives: Hardness and Softness at Electrified Interfaces
