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 Experiment Videos

Interactions between charged particles with bathing multivalent counterions: experiments vs. dressed ion theory.

Matej Kanduč1, Mohsen Moazzami-Gudarzi, Valentina Valmacco

  • 1Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany.

Physical Chemistry Chemical Physics : PCCP
|April 4, 2017
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Adsorption-Induced Pore Volume Deformation: Implications for Excess Adsorption in Kerogen Matrices.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

The effects of ionic valency and size asymmetry on counterion adsorption.

The Journal of chemical physics·2026
Same author

Quantifying Surfactant Adsorption at Fluid Interfaces by Combining X-ray Reflectivity and Simulations.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Effect of charge regulation on the screening properties of zwitterionic macroion solutions.

Soft matter·2026
Same author

Anomalous proteinaceous shells with octagonal local order.

Physical review. E·2025
Same author

Moment analysis of two-dimensional active Brownian run-and-tumble particles.

Physical review. E·2025

Dressed ion theory accurately predicts forces between charged colloidal particles, explaining deviations from DLVO theory attributed to ion correlations. This advances understanding of colloidal interactions.

Area of Science:

  • Colloid and Interface Science
  • Physical Chemistry
  • Statistical Mechanics

Background:

  • The Derjaguin-Landau-Verwey-Overbeek (DLVO) theory is a cornerstone for understanding colloidal particle interactions.
  • Deviations from DLVO predictions, particularly at small separations, suggest the presence of additional forces not accounted for by the standard theory.
  • Understanding these non-DLVO forces is crucial for controlling colloidal assembly and stability.

Purpose of the Study:

  • To compare experimental measurements of forces and effective surface potentials between charged colloidal particles with theoretical predictions.
  • To evaluate the validity of the dressed ion theory in explaining deviations from the DLVO theory.
  • To investigate the role of multivalent counterions and salt concentration on colloidal interactions.

Related Experiment Videos

Main Methods:

  • Experimental measurement of inter-particle forces and effective surface potentials.
  • Application of the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory as a baseline.
  • Comparison with predictions from the dressed ion theory, including a phenomenological exponential term for non-DLVO attractions.
  • Analysis of the influence of counterion concentration and valency on effective potentials.

Main Results:

  • Experimental forces and effective surface potentials align well with the predictions of the dressed ion theory.
  • Deviations from DLVO theory at small separations were successfully modeled by the dressed ion theory's parameters.
  • The theory accurately captured the dependence of effective potential on counterion concentration and valency.

Conclusions:

  • The dressed ion theory provides a robust framework for understanding interactions in strongly charged colloidal systems.
  • Ion correlations, as incorporated in the dressed ion theory, are likely responsible for the observed deviations from DLVO theory.
  • This work validates the dressed ion theory and offers insights into controlling colloidal behavior through ion manipulation.