Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

3.4K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
3.4K
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

62
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...
62
Ionic Association01:28

Ionic Association

166
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
166
The Debye–Hückel Theory of Electrolyte Solutions01:27

The Debye–Hückel Theory of Electrolyte Solutions

153
The Debye–Hückel theory, established by Peter Debye and Erich Hückel in 1923, is a fundamental concept in physical chemistry. It provides an understanding of the behavior of strong electrolytes in solution, particularly explaining their deviations from ideal behavior.The theory is based on Coulombic interactions (the attraction or repulsion between charged particles) between ions in solution. In an ionic solution, oppositely charged ions tend to attract each other. This means...
153
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

2.0K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
2.0K
Electrolytes: van't Hoff Factor03:08

Electrolytes: van't Hoff Factor

37.6K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
37.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

On the coupling between membrane bending and stretching in lipid vesicles.

Journal of colloid and interface science·2025
Same author

Correction: Cosmetic Breast Augmentation with Autologous Ex Vivo-Expanded Adipose-Derived Mesenchymal Stem/Stromal Cell (Stemform®)-Enriched Fat Grafts: A Study of the First Twenty-Two Real-World Patients.

Aesthetic plastic surgery·2023
Same author

Cosmetic Breast Augmentation with Autologous Ex Vivo-Expanded Adipose-Derived Mesenchymal Stem/Stromal Cell (Stemform®)-Enriched Fat Grafts: A Study of the First Twenty-Two Real-World Patients.

Aesthetic plastic surgery·2023
Same author

On the osmotic pressure of cells.

QRB discovery·2023
Same author

Diffusive intracellular interactions: On the role of protein net charge and functional adaptation.

Current opinion in structural biology·2023
Same author

Thermal fluctuations and osmotic stability of lipid vesicles.

Physical review. E·2023

Related Experiment Video

Updated: Mar 23, 2026

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

6.1K

Attractive ion-ion correlation forces and the dielectric approximation.

Luis Pegado1, Bo Jönsson2, Håkan Wennerström3

  • 1Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), UMR 6303 CNRS, Univ. Bourgogne Franche-Comté, 9 Av. A. Savary, BP 47870, F-21078 Dijon Cedex, France; Laboratory for Waste Management, Paul Scherrer Institute, Villigen, CH 5232, Switzerland.

Advances in Colloid and Interface Science
|April 3, 2016
PubMed
Summary

Explicitly modeling solvents in charged surface interactions reveals attractive ion-ion correlations and oscillatory forces. Agreement with continuum models is achieved when solvent molecules are small, highlighting long-range ion interactions.

Keywords:
Dielectric approximationDouble layer forcesIon–ion correlationsMolecular solventMonte Carlo simulations

More Related Videos

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis
10:38

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis

Published on: September 3, 2013

16.8K
Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
07:44

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Published on: April 27, 2016

10.2K

Related Experiment Videos

Last Updated: Mar 23, 2026

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

6.1K
Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis
10:38

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis

Published on: September 3, 2013

16.8K
Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
07:44

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Published on: April 27, 2016

10.2K

Area of Science:

  • Physical Chemistry
  • Computational Chemistry
  • Colloid Science

Background:

  • The interaction between charged surfaces in electrolyte solutions is a fundamental problem in physical chemistry.
  • Conventional models often use a dielectric approximation for the solvent, simplifying the system but potentially omitting crucial molecular details.

Purpose of the Study:

  • To investigate charged surface interactions by explicitly modeling the solvent molecules, moving beyond the dielectric approximation.
  • To compare simulation results with explicit solvent to established continuum models.

Main Methods:

  • Utilized Monte Carlo simulations employing a Stockmayer fluid model to represent the solvent.
  • Analyzed the forces between two charged surfaces immersed in this explicit solvent.

Main Results:

  • Confirmed the presence of attractive ion-ion correlation mechanisms even with explicit solvent treatment.
  • Observed an oscillatory component in the inter-surface forces, which, when accounted for, leads to semi-quantitative agreement with continuum models.
  • Demonstrated that continuum model properties emerge in molecular systems when solvent molecules are significantly smaller than ions.

Conclusions:

  • Explicit solvent modeling reveals a more complex interplay of microscopic forces but validates the importance of long-range ion-ion interactions.
  • The dielectric approximation remains adequate for describing the dominant long-range forces, explaining the agreement between continuum and explicit solvent models.
  • These findings are applicable to both idealized Stockmayer fluids and real aqueous systems.