Jove
Visualize
Contact Us

Related Experiment Videos

NOTE

Dimitrova1, Peikov, Petkanchin

  • 1Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia, 1113, BULGARIA

Journal of Colloid and Interface Science
|January 15, 1997
PubMed
Summary

The study reveals how counterions like iodide affect the electric dipole moment of beta-FeOOH particles. Increased ionic strength, especially with iodide ions, significantly alters particle surface properties.

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

Buffer-induced changes of purple membrane surface electric properties: an electro-optical study.

Colloids and surfaces. B, Biointerfaces·2000
Same author

Kinetics of Cream Formation by the Mechanism of Consolidation in Flocculating Emulsions.

Journal of colloid and interface science·2000
Same author

Electrooptics of beta-FeOOH Particles in Aqueous Media.

Journal of colloid and interface science·2000
Same author

A Chromatographic Effect Observed during Deposition of Cu-Mn Precursors on Active Carbon.

Journal of colloid and interface science·2000
Same author

Electric Properties of Adsorbed Polystyrenesulfonate.

Journal of colloid and interface science·1999
Same author

Characterization of Concentrated Magnetic Colloids by Measurements of Frequency Dependence of AC Magnetic Susceptibility.

Journal of colloid and interface science·1998
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

Area of Science:

  • Colloid and Surface Science
  • Physical Chemistry

Background:

  • Understanding electric surface properties of nanoparticles is crucial for controlling their behavior in dispersions.
  • Beta-iron oxyhydroxide (beta-FeOOH) particles are common in environmental and industrial applications.

Purpose of the Study:

  • To investigate the impact of various counterions (F-, Cl-, Br-, I-) on the electric surface properties of beta-FeOOH ellipsoid particles.
  • To determine how ionic strength influences the dipole moment and polarizability of these particles in aqueous solutions.

Main Methods:

  • Electric light scattering was employed to measure electric surface properties.
  • Electrophoresis was utilized to assess particle behavior under an electric field.

Main Results:

  • All tested counterions increased the longitudinal permanent dipole moment with rising ionic strength.
  • Iodide ions (I-) showed the most pronounced effect on the dipole moment.
  • An additional orientation moment was observed, likely due to counterion distribution changes near the particle surface.

Conclusions:

  • Counterion identity and concentration significantly influence the electric surface properties of beta-FeOOH particles.
  • The observed dipole moment changes are attributed to the distortion of counterion layers at the particle-solution interface.
  • These findings are important for predicting and controlling nanoparticle behavior in colloidal systems.

Related Experiment Videos