Electric Double Layer
Electric Double Layer - Related Videos
01:30
The Electrical Double Layer
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2026
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
08:12
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
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Cited by 10 •
2015
We describe the approaches for the device fabrication and electrical characterization of molybdenum diselenide (MoSe2) layer semiconductor nanostructures with different thicknesses. In addition, the fabrication of ohmic contacts for MoSe2-layer nanocrystals by the focused-ion beam deposition method using platinum (Pt) as a contact metal is described.
10:23
Electric Fields
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN An electric field is generated by a charged object (referred to as the source charge) in the space around it, and represents the ability to exert electric force on another charged object (referred to as the test charge). Represented by a vector at any given point in the space, the electric field is the electrical force per unit test charge placed at that point (the force...
06:50
Electric Potential
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Electric potential, also known as "voltage", measures the electric potential energy per unit charge. Electric field is a scalar quantity and is fundamental to many electrical effects. Like potential energy, what is physically meaningful is the difference in the electric potential. For example, the spatial variation in the electric potential is related to the electric...
14:32
Thin-Layer Chromatography - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Effects of Mobile Phase Composition on Compound SeparationExpand In this section of the lab, you will use TLC to compare how well pure hexane and a mixture of 60% hexane and 40% ethyl acetate can separate phenol, benzoic acid, and butyl phenyl ether by measuring the distance the compound traveled in each solvent. Before starting the lab, put on a lab coat, safety glasses, and nitrile gloves.
FAQs
The Stern layer is the compact region immediately adjacent to the charged interface, whereas the diffuse region extends farther into the electrolyte. Together, they describe how counterions and co-ions are organized near the surface and how electrostatic potential changes away from it. Distinguishing these regions helps explain interfacial capacitance and chemical behavior at the boundary.
Electrolyte concentration, temperature, and surface charge are key controlling variables. Changing these conditions alters the arrangement of counterions and co-ions and modifies the electrostatic potential across the interfacial region. Consequently, experiments that compare electrochemical or surface behavior must treat these variables as important conditions when interpreting changes at the interface.
The separated arrangement of charge at the interface creates interfacial capacitance, making the boundary electrically responsive. This property is important because ion accumulation influences electrical behavior as well as chemical events near the surface. In electrochemical research, capacitance therefore provides a way to connect charge organization with processes such as electron transfer and adsorption.
Its ion arrangement changes the electrical and chemical environment directly at the interface, where electron-transfer reactions and adsorption occur. Counterion accumulation, co-ion repulsion, and the resulting electrostatic potential can therefore affect how species interact with the surface. Studying these effects helps researchers relate interfacial charge conditions to chemical reactivity and surface uptake.
Researchers consider the interfacial charge arrangement when examining electrical and chemical behavior in electrochemical cells or during corrosion. The relevant analysis focuses on how electrolyte conditions and surface charge influence ion accumulation, potential, and interfacial reactions. This context helps connect microscopic behavior at a boundary with the performance or stability of the larger electrochemical system.
Ion accumulation directly affects interfacial electrical behavior, so controlling it can support improved performance and stability in sensors and supercapacitors. In sensors, the interface is relevant to chemical responses at the surface. In supercapacitors, the charge-organizing behavior of the interface is central to how the device manages electrochemical conditions.