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

Structure factor scaling in colloidal charge heteroaggregation.

A M Puertas1, A Fernández-Barbero, F J de Las Nieves

  • 1Group of Complex Fluids Physics, Department of Applied Physics, University of Almeria, 04120, Almeria, Spain. apuertas@ual.es

The European Physical Journal. E, Soft Matter
|November 12, 2005
PubMed
Summary
This summary is machine-generated.

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

Active and passive microrheology with large tracers in hard colloids.

The Journal of chemical physics·2023
Same author

Dynamics and friction of a large colloidal particle in a bath of hard spheres: Langevin dynamics simulations and hydrodynamic description.

Physical review. E·2020
Same author

Critical force in active microrheology.

Physical review. E·2020
Same author

A model for foreign exchange markets based on glassy Brownian systems.

PloS one·2017
Same author

Diffusive and Arrestedlike Dynamics in Currency Exchange Markets.

Physical review letters·2017
Same author

Active microrheology in a colloidal glass.

Physical review. E·2016
Same journal

What is active wetting?

The European physical journal. E, Soft matter·2026
Same journal

Metallic microresonator spectral modes with inhomogeneously twisted nematic in magnetic field.

The European physical journal. E, Soft matter·2026
Same journal

Perspective on the paper: GDR MiDi. On dense granular flows.

The European physical journal. E, Soft matter·2026
Same journal

Dynamics of a three-dimensional oil drop driven by a surface acoustic wave over topography.

The European physical journal. E, Soft matter·2026
Same journal

Resolvability parameters in molecular graphs of antimalarial drugs.

The European physical journal. E, Soft matter·2026
Same journal

Inertial forces and elastohydrodynamic interaction of spherical particles in wall-bounded sedimentation experiments at low <math><msub><mi>Re</mi> <mtext>P</mtext></msub></math>.

The European physical journal. E, Soft matter·2026
See all related articles

Heteroaggregation of oppositely charged colloids shows a structure factor peak due to depletion layers. This aggregation is diffusion-limited at long distances but influenced by interactions internally.

Area of Science:

  • Colloid and Surface Science
  • Soft Matter Physics
  • Computational Materials Science

Background:

  • Heteroaggregation of oppositely charged colloids is a key process in materials science.
  • Understanding the structure factor S(q) is crucial for characterizing colloidal systems.
  • Previous studies often focused on simpler aggregation models.

Purpose of the Study:

  • To investigate the structure factor S(q) in a 1:1 mixture of oppositely charged colloids undergoing heteroaggregation.
  • To analyze the influence of interaction range on the aggregation dynamics.
  • To identify the origins of structural features in the S(q) during heteroaggregation.

Main Methods:

  • Brownian dynamics simulations were employed to model the colloidal system.

Related Experiment Videos

  • The structure factor S(q) was calculated at various time points.
  • Scaling analysis, inspired by spinodal decomposition and diffusion-limited cluster aggregation (DLCA), was applied.

    • Main Results:

    • A distinct peak emerged in the structure factor S(q) at low wave vectors.
    • This peak exhibited time-scaling behavior consistent with spinodal decomposition.
    • A master function was achieved for different interaction ranges, indicating universal scaling.
    • The peak's origin was attributed to a depletion layer of clusters surrounding aggregates.
    • Long-distance interactions were found to be negligible, suggesting diffusion-limited aggregation.

    Conclusions:

    • The observed peak in S(q) is a signature of heteroaggregation dynamics in charged colloidal mixtures.
    • Depletion layers play a significant role in the low-wave-vector structure.
    • While long-range interactions are diffusion-limited, short-range forces impact internal cluster structure.