scholarly journals Electrostatic charge accumulation versus electrochemical doping in SrTiO3 electric double layer transistors

2010 ◽  
Vol 96 (25) ◽  
pp. 252107 ◽  
Author(s):  
K. Ueno ◽  
H. Shimotani ◽  
Y. Iwasa ◽  
M. Kawasaki
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Electrostatic Charge ◽  
Charge Accumulation ◽  
Electrochemical Doping

Visualizing charges accumulated in an electric double layer by three-dimensional open-loop electric potential microscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (30) ◽  
pp. 14736-14746 ◽  
Author(s):  
Kaito Hirata ◽  
Takuya Kitagawa ◽  
Keisuke Miyazawa ◽  
Takahiro Okamoto ◽  
Akira Fukunaga ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Potential ◽  
Electric Double Layer ◽  
Electrode Potential ◽  
Three Dimensional ◽  
Open Loop ◽  
Charge Accumulation ◽  
Electrolyte Interface ◽  
Accumulation Behavior

Charge accumulation behavior at the Au–electrolyte interface was visualized by three-dimensional open-loop electric potential microscopy with a varying electrode potential.

on the relationship between the electric double layer and actuation in ionomeric polymer transducers

2004 ◽  
Vol 855 ◽  
Author(s):  
Barbar J. Akle ◽  
Donald J. Leo
Keyword(s):  
Surface Charge ◽  
Double Layer ◽  
Electric Double Layer ◽  
High Surface ◽  
High Surface Area ◽  
Strongly Correlated ◽  
Charge Accumulation ◽  
Ionic Polymer ◽  
Positive Ions ◽  
Soft Actuators

ABSTRACTIonic polymer transducers are soft actuators that perform large bending deflections when voltages on the order of 1–5 V are applied across their thickness. Previous work showed that actuation performance of ionic polymer transducers is strongly correlated with the capacitance due to surface charge accumulation. Increasing the capacitance of the actuator increases the motion of the charges and increases the strain produced under the application of an electric field. Ionomeric transducers consist of an ionomer, such as Nafion (a product of DuPont), sandwiched between two high surface area electrodes. An electric double layer is formed on the interface between the cathode and the adsorbed positive ions. A novel plating technique which was previously developed is used to vary the morphology of the polymer-electrode interface to investigate the parameters of importance to the formation of the electric double layer. Electromechanical transducer tests are performed as a function of electrode morphology to correlate surface charge accumulation with the deflection generated by the transducer.

scholarly journals Specific Capacitance Characteristics of Carbons, Activated by Potassium Hydroxide

2015 ◽  
Vol 16 (1) ◽  
pp. 98-103 ◽  
Author(s):  
I. M. Budzulyak ◽  
B. I. Rachiy ◽  
V. M. Vashchynsky ◽  
M. V. Berkeschuk
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Potassium Hydroxide ◽  
Raw Materials ◽  
Chemical Activation ◽  
Charge Accumulation ◽  
Nanoporous Carbon Material ◽  
Wide Range ◽  
Current Densities ◽  
Almost All

This work is devoted to the study of the charge accumulation in the electric double layer on the polarized electrode of the electrochemical systems. A series of samples of the nanoporous carbon material obtained from natural raw materials. In order to improve its performance it has been made the modification of porous structure of the samples by thermal and chemical treatment. As an activator potassium hydroxide was used. Determination of the specific characteristics of ultracapacitors was conducted in a two-electrode cells by potentiodynamic and galvanostatic methods. The pore formation process was studied by simultaneous thermoanalyzer STA 449 F3 Jupiter. It is shown that the resulting materials have high values of capacitance, which is realized by charge accumulation in the electric double layer, the pseudocapacitance contribution is absent. The optimal modes of carbonization and chemical activation were defined. The dependence of specific characteristics on the modification mode has explained. It is shown that almost all the samples are highly resistant in a wide range of current densities.

scholarly journals ANALYSIS OF ELECTROSTATIC PROPERTIES OF POLYSTYRENE FOAM FILTRATION MEDIA

2019 ◽  
pp. 167-174
Author(s):  
D. V. Charnyi ◽  
Yu. A. Onanko
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Aqueous Suspension ◽  
Electrostatic Charge ◽  
Main Stage ◽  
Polystyrene Foam ◽  
Ζ Potential ◽  
Electrostatic Properties ◽  
Charging Time ◽  
Different Diameters

The relevance of research. The analysis of the aqueous suspension filtration initial stage through clean polystyrene foam filtration media carried out. Such feature of its work as hydro-sorting is considered. The degree of imbalance and interaction with other electrostatic systems in aqueous suspension determines the layer of potential-forming ions, which is formed around the core of the system. It determines system’s sign and most of the electrical double layer charge. It is usually determined using a physical quantity such as electrostatic or ζ-potential. The aim of this work is to determine the electrostatic properties of polystyrene foam granules and the degree of influence on the process of retaining various nature colloidal particles on their surface when filtering an aqueous suspension through them. Research results. The relationship between the sizes of polystyrene foam granules and the concentrations of electrostatic charge on their surface analyzed. Using the Poison-Boltzmann theory, a relationship between an electrostatic charge and an electric double layer of polystyrene foam granules in aqueous suspension showed. The importance of the ζ-potential researching for controlling of colloidal suspensions filtering process substantiated. The electrostatic properties of different morphology colloids studied. Analysis of research data confirms the hypothesis of a very close connection between the various morphologies colloids ζ-potential magnitude and their electric double layer interaction force with electric double layer of polystyrene foam granules in an aqueous suspension. This means that the polystyrene foam filter “charging” time is closely connected to the values of colloids ζ-potential in the filtered aqueous suspension. Conclusions. The initial filtration stage through clean polystyrene foam media is significantly different from the main stage of filtration due to the electrostatic interaction forces predominance. The time difference of the colloidal crusts complete formation completion on polystyrene foam granules of different diameters is so insignificant that it can be neglected and this time is considered the same for polystyrene foam granules of different diameters. Regardless of the origin nature, the retention intensity of the colloids by polystyrene foam filtration media granules and, consequently, the polystyrene filter “charging” time is directly depends on their z-potential value.  

Electrode for Electric Double Layer Capacitor Made of Carbonized and Activated Cotton Cloth

2014 ◽  
Vol 134 (5) ◽  
pp. 360-361
Author(s):  
Masumi Fukuma ◽  
Takayuki Uchida ◽  
Yukito Fukushima ◽  
Jinichi Ogawa ◽  
Katsumi Yoshino
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Cotton Cloth ◽  
Electric Double Layer Capacitor ◽  
Double Layer Capacitor
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