Double Layer of Au(100)/Ionic Liquid Interface and Its Stability in Imidazolium-Based Ionic Liquids

2009 ◽  
Vol 48 (28) ◽  
pp. 5148-5151 ◽  
Author(s):  
Yu-Zhuan Su ◽  
Yong-Chun Fu ◽  
Jia-Wei Yan ◽  
Zhao-Bin Chen ◽  
Bing-Wei Mao
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Liquid Interface

Differential Capacity of the Double-Layer Formed at a Solid Electrode (Pt, Au)/Ionic Liquid Interface

2007 ◽  
Vol 62 (3-4) ◽  
pp. 187-190 ◽  
Author(s):  
Andrzej Lewandowski ◽  
Maciej Galiński ◽  
Sebastian R. Krajewski
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Electrode System ◽  
Liquid Interface ◽  
Potential Range ◽  
Differential Capacity ◽  
Impedance Measurements ◽  
Solid Electrode ◽  
Double Layer Capacity

The differential capacity at the electrode (Pt, Au)/ionic liquid interface of 18 ionic liquids (ILs), was measured applying chronoamperometry. The measurements were done by a two electrode system. The double layer capacity at the Pt/IL and Au/IL interface was 1 - 8 μF/cm2. The capacity, estimated from the impedance measurements, was approximately constant within a potential range of ca. 3 V.

Double Layer of Au(100)/Ionic Liquid Interface and Its Stability in Imidazolium-Based Ionic Liquids

2009 ◽  
Vol 121 (28) ◽  
pp. 5250-5253 ◽  
Author(s):  
Yu-Zhuan Su ◽  
Yong-Chun Fu ◽  
Jia-Wei Yan ◽  
Zhao-Bin Chen ◽  
Bing-Wei Mao
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Liquid Interface

scholarly journals In operando evidence of deoxygenation in ionic liquid gating of YBa2Cu3O7-X

2016 ◽  
Vol 114 (2) ◽  
pp. 215-220 ◽  
Author(s):  
Ana M. Perez-Muñoz ◽  
Pedro Schio ◽  
Roberta Poloni ◽  
Alejandro Fernandez-Martinez ◽  
Alberto Rivera-Calzada ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Density Functional ◽  
Insulator Transition ◽  
Chemical Doping ◽  
True Nature ◽  
Oxide Electronics ◽  
Electrostatic Doping ◽  
Metal To Insulator Transition

Field-effect experiments on cuprates using ionic liquids have enabled the exploration of their rich phase diagrams [Leng X, et al. (2011) Phys Rev Lett 107(2):027001]. Conventional understanding of the electrostatic doping is in terms of modifications of the charge density to screen the electric field generated at the double layer. However, it has been recently reported that the suppression of the metal to insulator transition induced in VO2 by ionic liquid gating is due to oxygen vacancy formation rather than to electrostatic doping [Jeong J, et al. (2013) Science 339(6126):1402–1405]. These results underscore the debate on the true nature, electrostatic vs. electrochemical, of the doping of cuprates with ionic liquids. Here, we address the doping mechanism of the high-temperature superconductor YBa2Cu3O7-X (YBCO) by simultaneous ionic liquid gating and X-ray absorption experiments. Pronounced spectral changes are observed at the Cu K-edge concomitant with the superconductor-to-insulator transition, evidencing modification of the Cu coordination resulting from the deoxygenation of the CuO chains, as confirmed by first-principles density functional theory (DFT) simulations. Beyond providing evidence of the importance of chemical doping in electric double-layer (EDL) gating experiments with superconducting cuprates, our work shows that interfacing correlated oxides with ionic liquids enables a delicate control of oxygen content, paving the way to novel electrochemical concepts in future oxide electronics.

The diffuse double layer in ionic liquids

2009 ◽  
Vol 74 (11-12) ◽  
pp. 1665-1674 ◽  
Author(s):  
W. Ronald Fawcett ◽  
Peter J. Ryan
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Room Temperature ◽  
Potential Drop ◽  
Diffuse Double Layer ◽  
Differential Capacity ◽  
Monte Carlo Data ◽  
Monovalent Ions ◽  
Salt Systems

The equations used to describe the diffuse double layer in the Eigen–Wicke model of ionic liquids are presented. They are then used to estimate the potential drop across the diffuse layer and its differential capacity for two representative systems which contain monovalent ions of equal diameter. The first one is molten RbCl at 750 °C. The second system is a room temperature ionic liquid with typical parameters to describe its properties. The results of the calculations are compared with the available experimental data. It is concluded that the Eigen–Wicke model does not consider the change in local potential experienced by a given ion in the ionic liquid. The need for Monte Carlo data for the diffuse double layer in molten salt systems is emphasized.

The electrical double layer at the ionic liquid/Au and Pt electrode interface

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 28914-28921 ◽  
Author(s):  
Cristiana Gomes ◽  
Renata Costa ◽  
Carlos M. Pereira ◽  
A. Fernando Silva
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Electrode Material ◽  
Layer Structure ◽  
Pt Electrode ◽  
Double Layer Structure ◽  
Pt Electrodes ◽  
Electrode Interface

The role of the electrode material on the interfacial double layer structure of a series of ionic liquids comprising 1-butyl-3-methylimidazolium hexafluorophosphate (C4MIM][PF6]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4MIM][Tf2N]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([C4MIM][BF4]) was investigated on gold (Au) and platinum (Pt) electrodes.

scholarly journals Methods and approaches of utilizing ionic liquids as gas sensing materials

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58371-58392 ◽  
Author(s):  
Abdul Rehman ◽  
Xiangqun Zeng
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Gas Sensing ◽  
Liquid Interface ◽  
Specific Device ◽  
Interface Designs

Linking ionic liquid interface designs to specific device protocols to address analytical challenges in gas sensing.

scholarly journals Electroviscosity III. Sedimentation phenomena in ionic liquids

1949 ◽  
Vol 197 (1051) ◽  
pp. 568-572 ◽  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Potassium Chloride ◽  
Double Layer ◽  
Sedimentation Velocity ◽  
Ionic Concentration ◽  
Chloride Solutions ◽  
System Of Particles ◽  
Rate Of Sedimentation

It is demonstrated that the rate of sedimentation of a system of particles in an ionic liquid may vary markedly with the ionic concentration, due to variation in the electroviscous forces which resist shear in the double layer of ions associated with each particle. Equations governing the rate of sedimentation are derived, and used to calculate values for the electro-kinetic potentials of carborundum in potassium chloride solutions, from data on sedimentation velocity. These values are compared with those previously obtained from data on electro-endosmosis.

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