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

Static and dynamic correlations in a charged membrane.

Wokyung Sung1, Eunju Choi, Yong Woon Kim

  • 1Department of Physics and PCTP, Pohang University of Science and Technology, Pohang 790-784, South Korea.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 10, 2006
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

Testicular seminoma: clinical, imaging, and histologic features in nine horses.

Journal of veterinary internal medicine·2026
Same author

Symptom burden in cancer survivorship: insights from a survivorship program's patient-reported outcomes database.

Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation·2026
Same author

A Virtual, Group-Based Expressive Writing Intervention for Survivors of Adolescent and Young Adult Cancer: Protocol for a Single-Arm Feasibility Study.

JMIR research protocols·2026
Same author

Moderating Effects of Social Determinants of Health on Quality of Life in Expressive Writing Interventions Among Chinese American Breast Cancer Survivors.

Psycho-oncology·2026
Same author

Navigating rural challenges and promoting posttraumatic growth via expressive writing: A qualitative study among rural breast cancer survivors.

Research square·2026
Same author

APE1/Ref-1 redox function prevents VSMC phenotypic switching through KLF4 suppression.

Cellular signalling·2026

We investigated charge density and height fluctuations in charged fluid membranes. Unlike charge density, height undulations exhibit long-range correlations and can lead to bending instability at critical charge densities.

Area of Science:

  • Membrane biophysics
  • Soft matter physics
  • Physical chemistry

Background:

  • Fluid membranes exhibit complex behaviors influenced by charge distributions.
  • Understanding membrane fluctuations is crucial for cellular processes and biomaterial design.
  • Excess charges on membranes can significantly alter their mechanical and dynamic properties.

Purpose of the Study:

  • To analyze static and dynamic correlations of charge density and height fluctuations in charged fluid membranes.
  • To investigate the influence of excess charge on membrane undulations and stability.
  • To model the behavior of these fluctuations using a Gaussian Hamiltonian.

Main Methods:

  • Developed a theoretical model for a planar, symmetrical fluid membrane with finite excess charge.

Related Experiment Videos

  • Constructed equations of motion for charge density and height fluctuations.
  • Analyzed correlation functions (static and dynamic) for both types of fluctuations.

    • Main Results:

    • Charge density fluctuations show short-range damped oscillations due to lipid interactions.
    • Height undulations display long-range damped oscillations (buds) driven by excess charge repulsion.
    • A critical excess charge density was identified, leading to bending instability and large bud formation.
    • Dynamic correlations of undulations decay slowly, becoming infinitely slow at the instability threshold.

    Conclusions:

    • Charge density and height fluctuations are largely independent in this model.
    • Excess charge plays a critical role in membrane undulation dynamics and stability.
    • The study provides insights into membrane instability mechanisms driven by electrostatic interactions.