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Related Concept Videos

Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
The Electrical Double Layer01:30

The Electrical Double Layer

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...

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Related Experiment Video

Updated: May 7, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

Beyond the continuum: how molecular solvent structure affects electrostatics and hydrodynamics at solid-electrolyte

Douwe Jan Bonthuis1, Roland R Netz

  • 1Rudolf Peierls Centre for Theoretical Physics, University of Oxford , Oxford OX1 3NP, United Kingdom.

The Journal of Physical Chemistry. B
|September 26, 2013
PubMed
Summary
This summary is machine-generated.

Standard theories fail to explain electrostatic phenomena at interfaces. This study integrates molecular dynamics simulations with continuum theory to accurately model ion behavior and surface properties, offering new insights into charged surface behavior.

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Spatial Separation of Molecular Conformers and Clusters
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Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

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Last Updated: May 7, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Area of Science:

  • Physical Chemistry
  • Computational Chemistry
  • Surface Science

Background:

  • Continuum theories struggle to predict experimental electrostatic and electrokinetic phenomena at aqueous electrolyte interfaces.
  • Molecular solvent structure significantly influences interfacial behavior, necessitating advanced theoretical approaches.

Purpose of the Study:

  • To extend continuum theory by incorporating molecular solvent structure effects for improved prediction of interfacial properties.
  • To develop a unified modeling framework combining atomistic simulations and continuum electrochemistry.

Main Methods:

  • Generalizing electrokinetic transport equations to include space-dependent dielectric, viscosity, and non-electrostatic potentials.
  • Extracting these profiles from atomistic molecular dynamics (MD) simulations.
  • Employing an extended Poisson-Boltzmann equation and generalized hydrodynamic theory.

Main Results:

  • Accurately reproduced ion-specific counterion distributions at charged hydrophilic and hydrophobic interfaces using MD-derived profiles.
  • Demonstrated the necessity of nonlinear response theory for modeling Cl(-) at hydrophobic surfaces.
  • Extended Poisson-Boltzmann equation successfully predicted double-layer capacitance for carbon-based surfaces.
  • The model captured electrokinetic mobility saturation and anomalous double-layer conductivity.

Conclusions:

  • A two-scale approach combining MD simulations and continuum theory provides fundamental insights into the molecular origins of charged surface properties.
  • This integrated model offers a computationally efficient method for quantitative prediction of interfacial electrostatic and electrokinetic phenomena.