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

Manning-Oosawa counterion condensation.

Ben O'Shaughnessy1, Qingbo Yang

  • 1Department of Chemical Engineering, Columbia University, New York, NY 10027, USA. bo8@columbia.edu

Physical Review Letters
|March 24, 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

Next-Generation Bionic Sensors for Small Molecule Detection: Integrating Synthetic Biology, Nanomaterials, and Artificial Intelligence.

Micromachines·2026
Same author

Comparison of the efficacy of different orthotopic neobladder reconstruction techniques following radical cystectomy for bladder cancer: a network meta-analysis.

Frontiers in oncology·2026
Same author

<i>Drosophila</i> germ band extension: a two-state reshaping mechanism.

bioRxiv : the preprint server for biology·2026
Same author

Cyclin B3 dsRNA Orchestrate Meiotic Progression in Porcine Oocytes.

Journal of molecular cell biology·2026
Same author

NeuProIO: A dual-Action Solid Drug Nanoparticle Topical Formulation for Simultaneous Intraocular Pressure Reduction and Neuroprotection for Glaucoma.

Chemical engineering journal (Lausanne, Switzerland : 1996)·2026
Same author

Reprogramming of the inflammatory microenvironment by a therapeutic compound from Alangium chinense (Lour.) harms via dual modulation of COX-2 and autophagy in rheumatoid arthritis.

Bioorganic chemistry·2026

Highly charged polymers like DNA attract condensed ions due to electrostatics. This study reveals universal ion density profiles in the condensate, independent of polymer properties, for better understanding of charged polymer solutions.

Area of Science:

  • Physical Chemistry
  • Polymer Science
  • Electrostatics

Background:

  • Counterion condensation is a fundamental aspect of 2D electrostatics for highly charged rodlike polymers.
  • Polymers such as DNA exhibit significant charge density, influencing their interaction with surrounding ions.

Purpose of the Study:

  • To investigate the structure of counterion condensates around charged polymers using the Poisson-Boltzmann equation.
  • To determine the universal density profiles of free ions within these condensates.

Main Methods:

  • Utilized the Poisson-Boltzmann equation framework, incorporating salt effects.
  • Derived condensate thickness and ion density profiles using theoretical analysis.
  • Analyzed the leading order behavior in terms of the ratio of Debye length to polymer radius.

Related Experiment Videos

Main Results:

  • Derived a formula for condensate thickness (RM = A(axi)^1/2), where xi is the Debye length.
  • Showed that free ion density profiles are universal and independent of polymer radius (a) and charge density (q0).
  • Extended the analysis to calculate ion profiles for finite concentration solutions.

Conclusions:

  • The study provides a theoretical framework for understanding counterion condensation around charged polymers.
  • Demonstrated the universality of ion distribution in polymer condensates, offering insights into charged polymer solution behavior.
  • The findings are applicable to various systems involving highly charged rodlike molecules.