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 Concept Videos

The Colloidal State01:29

The Colloidal State

184
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
184
Colloidal precipitates01:09

Colloidal precipitates

5.7K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
5.7K
Colloids and Suspensions01:17

Colloids and Suspensions

3.4K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.4K
Colloids03:22

Colloids

17.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.2K
Coagulation01:06

Coagulation

1.5K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.5K
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

937
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
937

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Field-induced tubular assembly of ionic microgels: Evidence for shape anisotropy from small-angle neutron scattering studies.

Journal of colloid and interface science·2026
Same author

Star-Like Microgels vs Star Polymers: Similarities and Differences.

Macromolecules·2026
Same author

Unexpected behavior of ultra-low-crosslinked microgels in crowded conditions.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Probing the dynamics and stability of micellar casein and <i>para</i>-casein dispersions with differential dynamic microscopy.

Physical chemistry chemical physics : PCCP·2026
Same author

Self-Induced Buckling in Hollow Microgels.

ACS nano·2026
Same author

Electrostatic interactions reshape the internal architecture of ionic microgels.

Journal of colloid and interface science·2026

Related Experiment Video

Updated: May 2, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

11.5K

Effective interactions between soft-repulsive colloids: experiments, theory, and simulations.

Priti S Mohanty1, Divya Paloli1, Jérôme J Crassous1

  • 1Division of Physical Chemistry, Lund University, Lund, Sweden.

The Journal of Chemical Physics
|March 11, 2014
PubMed
Summary

This study reveals the effective pair-interaction potential of Poly(N-isopropylacrylamide) microgels using experimental, theoretical, and simulation methods. A Hertzian sphere model accurately describes their structural correlations in the fluid phase.

More Related Videos

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

9.5K
Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

Published on: July 18, 2014

10.2K

Related Experiment Videos

Last Updated: May 2, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

11.5K
Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

9.5K
Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

Published on: July 18, 2014

10.2K

Area of Science:

  • Soft Matter Physics
  • Polymer Science
  • Materials Science

Background:

  • Poly(N-isopropylacrylamide) (PNIPAM) microgels are responsive polymer networks with tunable properties.
  • Understanding interparticle interactions is crucial for controlling microgel dispersion behavior.

Purpose of the Study:

  • To determine the effective pair-interaction potential of cross-linked PNIPAM microgel dispersions.
  • To establish structural correlations between microgels in the fluid phase.

Main Methods:

  • Combined experimental, theoretical, and simulation approaches.
  • Fluorescent confocal microscopy for real-space pair distribution functions.
  • Integral equation theory and molecular dynamics simulations.

Main Results:

  • A Hertzian sphere model successfully reproduced experimental pair distribution functions.
  • Particle size and repulsive strength were key parameters.
  • Effects of microscope resolution and Brownian motion were analyzed.

Conclusions:

  • The Hertzian sphere model provides a robust description of PNIPAM microgel fluid behavior.
  • The study offers insights into interparticle potentials for soft materials.
  • Comparison of 2D and 3D data revealed information content differences.