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

Colloids03:22

Colloids

20.4K
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 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...
20.4K
Colloidal precipitates01:09

Colloidal precipitates

4.6K
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...
4.6K
Solubility03:00

Solubility

20.6K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
20.6K
Coagulation01:06

Coagulation

1.1K
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...
1.1K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.7K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.7K

You might also read

Related Articles

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

Sort by
Same author

Closed Loop Navigation of a Complex State Space: Assembling Anisotropic Colloids into Perfect Crystals.

ACS nano·2026
Same author

Drug & virus transport across biological barriers: interactions, diffusion, partitioning, permeability, and selectivity.

Soft matter·2026
Same author

Feedback Controlled Reconfiguration of Ellipsoidal Colloids between Interfacial Liquid, Nematic, and Crystal States.

ACS applied materials & interfaces·2025
Same author

Fabrication and Modeling of a Thermoreversible Modular Core-Shell Colloidal System.

Langmuir : the ACS journal of surfaces and colloids·2025
Same author

A novel presentation of calcinosis cutis of the scalp in adult dermatomyositis.

Dermatology online journal·2025
Same author

Learning to build low-field MRIs for remote northern communities.

Frontiers in neuroimaging·2025
Same journal

Synergistic Buried Interface Engineering via Ion Exchange and Passivation for High-Performance Inverted Perovskite Solar Cells.

ACS applied materials & interfaces·2026
Same journal

In Situ Wet Coating of Ammonium Phosphomolybdate for Enhancing the Kinetics and Cycling Stability of NaNi<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> Cathode Material.

ACS applied materials & interfaces·2026
Same journal

Molecular Hybrids of Serum Albumin and Cobalt Phthalocyanine for Asymmetric Oxidation of C=C and C-H Bonds.

ACS applied materials & interfaces·2026
Same journal

A High-Throughput Platform for Measuring and Predicting Vitrification Behavior in Multicomponent Aqueous Solutions.

ACS applied materials & interfaces·2026
Same journal

A Brain-Targeted DNA Delivery Nanocarrier Modulator for Synergistic Therapy of Parkinson's Disease.

ACS applied materials & interfaces·2026
Same journal

Quasi-Discrete Channels of Porous Coordination Polymers for Selective Multiscenario CO<sub>2</sub> Recognition.

ACS applied materials & interfaces·2026
See all related articles

Related Experiment Video

Updated: Dec 27, 2025

Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
07:01

Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils

Published on: January 25, 2018

10.4K

Synergistic Polymer-Surfactant-Complex Mediated Colloidal Interactions and Deposition.

Helya Najafi1, Huda A Jerri2, Valentina Valmacco3

  • 1Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States.

ACS Applied Materials & Interfaces
|March 4, 2020
PubMed
Summary
This summary is machine-generated.

Total internal reflection microscopy (TIRM) reveals how polymer-surfactant mixtures control colloidal deposition. Specific compositions promote or prevent particle adhesion through synergistic interactions, guiding formulation design.

Keywords:
DLVO interactionscoacervationdepletion interactionspolymer bridgingreversible and irreversible depositionsteric interactions

More Related Videos

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.3K
Enhanced Oil Recovery using a Combination of Biosurfactants
13:19

Enhanced Oil Recovery using a Combination of Biosurfactants

Published on: June 3, 2022

5.8K

Related Experiment Videos

Last Updated: Dec 27, 2025

Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
07:01

Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils

Published on: January 25, 2018

10.4K
Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.3K
Enhanced Oil Recovery using a Combination of Biosurfactants
13:19

Enhanced Oil Recovery using a Combination of Biosurfactants

Published on: June 3, 2022

5.8K

Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Physical Chemistry

Background:

  • Understanding colloid-surface interactions is crucial for controlling deposition in formulations.
  • Polymer-surfactant mixtures create complex interfacial environments.
  • Selective colloidal deposition is vital in applications like coatings and personal care products.

Purpose of the Study:

  • To directly measure colloidal interactions, dynamics, and deposition in polymer-surfactant systems.
  • To construct a deposition state diagram for various polymer-surfactant compositions.
  • To elucidate the mechanisms governing colloid-surface interactions in these complex mixtures.

Main Methods:

  • Total Internal Reflection Microscopy (TIRM) for direct, sensitive measurement.
  • Characterization of bulk polymer-surfactant phase behavior.
  • Analysis of surface properties and colloid-substrate interaction potentials.

Main Results:

  • A comprehensive deposition state diagram was generated across four decades of polymer and surfactant concentrations.
  • Colloid-substrate interactions and deposition behavior exhibited nonmonotonic and synergistic trends.
  • Specific polymer-surfactant compositions induced bridging/depletion attractions or electrosteric repulsion.

Conclusions:

  • Polymer-surfactant complexes dictate colloidal deposition mechanisms.
  • Synergistic effects, not simple superposition, govern interactions.
  • Findings provide insights for controlling selective colloidal deposition in multicomponent formulations.