Electrostatic Stabilization of Charged Colloidal Particles with Adsorbed Polyelectrolytes of Opposite Charge.

06:00 EDT 9th September 2010 | BioPortfolio

Summary of "Electrostatic Stabilization of Charged Colloidal Particles with Adsorbed Polyelectrolytes of Opposite Charge."

Repulsive electrostatic double-layer forces are responsible for the stabilization of charged colloidal particles in the presence of adsorbed polyelectrolytes of opposite and high line charge densities. This mechanism is revealed by studies of electrophoretic mobility and colloidal stability performed with dynamic light scattering as a function of the polyelectrolyte dose and the ionic strength for two different types of latex particles and four different types of polyelectrolytes. The dependence of these quantities is very similar for bare charged latex particles and the same particles in the presence of the different oppositely charged polyelectrolytes. Positively charged particles in the presence of anionic polyelectrolytes behave analogously to negatively charged particles in the presence of cationic polyelectrolytes.


Department of Inorganic, Analytical, and Applied Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1205 Geneva, Switzerland.

Journal Details

This article was published in the following journal.

Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827


PubMed Articles [4450 Associated PubMed Articles listed on BioPortfolio]

Interaction of Charged Colloidal Particles at the Air-Water Interface.

We study, using Monte Carlo simulations, the interaction between charged colloidal particles confined to the air-water interface. The dependence of force on ionic strength and counterion valence is ex...

Controlled Clustering in Binary Charged Colloids by Adsorption of Ionic Surfactants.

We report on the controlled clustering of charged colloidal particles by the adsorption of ionic surfactants, which tunes charge numbers Z of partilces. In particular, we studied the heteroclustering ...

Understanding the lateral movement of particles adsorbed at a solid-liquid interface.

In this paper we study the phenomenon of lateral movement of particles that are electrostatically adsorbed at a solid-liquid interface. The experimental system involves negatively charged silica parti...

Electrostatic interaction of soft particles.

Theories of the electrostatic interaction between two soft particles (i.e., particles covered with an ion-penetrable surface layer of polyelectrolytes) in an electrolyte solution are reviewed. Interac...

Particle segregation at contact lines of evaporating colloidal drops: Influence of the substrate wettability and particle charge-mass ratio.

Segregation of particles during capillary/convective self-assembly is interesting for self-stratification in colloidal deposits. In evaporating drops containing colloidal particles, the wettability pr...

Clinical Trials [269 Associated Clinical Trials listed on BioPortfolio]

Effect of Spacer in Extrafine Formoterol-Beclomethasone Treatment to Asthma

Combined inhaled treatment with long acting adrenergics and steroids in an unique inhaler plays an important role in the management of non-mild asthma. Some studies have demonstrated that ...

Canadian Manufactured Tetanus and Diphtheria Toxoids Adsorbed (Td) Vaccine Compared With U.S. Manufactured Td

To compare the seroprotection rates and booster responses to Canadian-manufactured Tetanus and Diphtheria Toxoids Adsorbed to the seroprotection rates and booster responses to the US-manuf...

Safety and Efficacy Study of Panzem NCD to Treat Glioblastoma

This single-center, open-label, phase 2 study will evaluate the anti-tumor activity, as well as the safety and pharmacokinetics, of Panzem (2-methoxyestradiol, 2ME2) Nanocrystal Colloidal ...

Charged Particle RT for Chordomas and Chondrosarcomas of the Base of Skull or Cervical Spine

The primary purpose of this study is to determine if the administration of a higher dose would decrease the chance of tumor recurrence, compared to the risk of tumor recurrence with a lowe...

Safety and Efficacy Study of Panzem® Nanocrystal Colloidal Dispersion in Patients With Ovarian Cancer

The purpose of this study is to evaluate the efficacy, limited pharmacokinetics (PK), and safety of 1,000 mg of Panzem® NCD administered orally four times a day to patients with recurrent...

Medical and Biotech [MESH] Definitions

Characteristics of ELECTRICITY and magnetism such as charged particles and the properties and behavior of charged particles, and other phenomena related to or associated with electromagnetism.

Passive agglutination tests in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. (From Stedman, 26th ed)

Positively charged particles composed of two protons and two NEUTRONS, i.e. equivalent to HELIUM nuclei, which are emitted during disintegration of heavy ISOTOPES. Alpha rays have very strong ionizing power, but weak penetrability.

A phenomenon manifested by an agent or substance adhering to or being adsorbed on the surface of a red blood cell, as tuberculin can be adsorbed on red blood cells under certain conditions. (Stedman, 25th ed)

Devices for accelerating charged particles in a spiral path by a constant-frequency alternating electric field. This electric field is synchronized with the movement of the particles in a constant magnetic field.