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

Movement of colloidal particles in two-dimensional electric fields.

Junhyung Kim1, Stephen Garoff, John L Anderson

  • 1Department of Chemical Engineering, Center for Complex Fluid Engineering, and Physics Department, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|November 16, 2005
PubMed
Summary

Carbon black particles move in 2D electric fields, showing electrophoresis in the center but anomalous motion near electrodes. This suggests electrohydrodynamic flows, not just electrophoresis, influence particle behavior in display applications.

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

Fracture Risk Evaluation of Trochlear Groove Depth in Toy and Small-Breed Dogs Under Gait-Based Loading: A Finite Element and Fatigue Analysis Study.

Animals : an open access journal from MDPI·2026
Same author

Super-resolution deep learning reconstruction for brain fluid-attenuated inversion recovery: image quality and white matter hyperintensity volume analysis.

Neuroradiology·2026
Same author

Long-term real-world outcomes and device management of intrathecal drug delivery systems: A 16-year single-center experience with a primary focus on baclofen therapy.

Clinical neurology and neurosurgery·2026
Same author

Cleft Palate Repair Guided by Cleft Gap: An Institutional Protocol Using Modified Asymmetric Short Limb Z-plasty (MASLZ) and Straight-line Repair.

Plastic and reconstructive surgery·2026
Same author

Preliminary efficacy of a self-guided mobile intervention for reducing stress in depression: A randomized controlled crossover trial.

Journal of affective disorders·2026
Same author

Biomechanical evaluation of structural integrity after tibial plateau leveling osteotomy in dogs using finite element analysis.

Scientific reports·2026

Area of Science:

  • Colloid and Interface Science
  • Electrokinetics
  • Materials Science

Background:

  • Carbon black particles are utilized in various applications, including electronic displays.
  • Understanding particle behavior in electric fields is crucial for optimizing device performance.
  • Previous studies have focused on electrophoresis, but complex field interactions require further investigation.

Purpose of the Study:

  • To characterize the motion of carbon black particles in inhomogeneous, two-dimensional direct current (dc) electric fields.
  • To investigate particle dynamics in a nonpolar solvent relevant to display technologies.
  • To analyze deviations from predicted electrophoretic mobility and identify underlying mechanisms.

Main Methods:

  • Generation of two-dimensional dc electric fields using strip electrodes on a glass slide (120 microm spacing).

Related Experiment Videos

  • Suspension of carbon black particles in a nonpolar solvent with a charge control agent.
  • Measurement of particle velocities under varying electric field strengths (up to 10^4 V/m).
  • Analysis of particle trajectories and comparison with theoretical electrophoretic models.

    • Main Results:

    • Particles moved between electrodes within approximately 30 seconds.
    • In the central region, particle velocity was proportional to the electric field (electrophoresis).
    • Observed electrophoretic mobility values fell outside the range predicted by O'Brien and White theory.
    • Anomalous particle acceleration/deceleration near electrodes could not be explained by simple electrophoresis.

    Conclusions:

    • Anomalous particle motion near electrodes is likely caused by electrohydrodynamic (EHD) flows.
    • EHD flows originate from the interaction between space charge layers and the electric field.
    • Calculations suggest EHD flows are strong enough to account for the observed anomalous trajectories.