Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Colloidal State

The Colloidal State

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 the...

Colloids

Colloids

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...

Colloidal precipitates

Colloidal precipitates

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...

Radical Reactivity: Steric Effects

Radical Reactivity: Steric Effects

The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic factors, steric factors also account...

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

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

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 concentration...

You might also read

Related Articles

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

Sort by

Same author

Single, Janus, and Cerberus emulsions from the vibrational emulsification of oils with significant mutual solubility.

Soft matter·2017

Same author

Janus emulsion mediated porous scaffold bio-fabrication.

Colloids and surfaces. B, Biointerfaces·2016

Same author

Topical application of retinyl palmitate-loaded nanotechnology-based drug delivery systems for the treatment of skin aging.

BioMed research international·2014

Same author

Equilibrium topology and partial inversion of Janus drops: a numerical analysis.

Chemphyschem : a European journal of chemical physics and physical chemistry·2013

Same author

Spontaneous emulsification between incompatible aqueous solutions in the water/ethanol/benzene system.

Journal of colloid and interface science·2013

Same author

One-step inversion process to a Janus emulsion with two mutually insoluble oils.

Langmuir : the ACS journal of surfaces and colloids·2011

Search research articles

Related Experiment Video

Updated: May 31, 2026

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

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

Published on: January 25, 2018

Destabilization mechanisms in a triple emulsion with Janus drops.

Hida Hasinovic¹, Stig E Friberg

¹Ashland Consumer Markets/Valvoline, Lexington, KY, USA.

Journal of Colloid and Interface Science

|June 28, 2011

Summary

The destabilization of triple Janus emulsions involves oil separation, leading to density changes and complex drop sedimentation. This process results in distinct layer formations and emulsion inversion.

More Related Videos

Particle Templated Emulsification enables Microfluidic-Free Droplet Assays

Particle Templated Emulsification enables Microfluidic-Free Droplet Assays

Published on: March 9, 2021

Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device

Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device

Published on: December 25, 2015

Related Experiment Videos

Last Updated: May 31, 2026

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

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

Published on: January 25, 2018

Particle Templated Emulsification enables Microfluidic-Free Droplet Assays

Particle Templated Emulsification enables Microfluidic-Free Droplet Assays

Published on: March 9, 2021

Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device

Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device

Published on: December 25, 2015

Area of Science:

Colloid and Surface Science
Materials Science
Physical Chemistry

Background:

Triple Janus emulsions are complex multiphase systems with unique interfacial properties.
Understanding their destabilization is crucial for controlling their stability and applications.
Previous studies have focused on simpler emulsion systems, leaving triple Janus emulsions less explored.

Purpose of the Study:

To investigate the destabilization mechanism of a specific triple Janus emulsion: (SO+VO)/W/VO/SO.
To observe the time-dependent creaming/sedimentation, layer separation, and drop morphology changes.
To elucidate the sequence of events leading to emulsion breakdown and phase separation.

Main Methods:

Preparation of a (SO+VO)/W/VO/SO triple Janus emulsion.
Observation of creaming/sedimentation over time.
Optical microscopy to monitor drop configuration and changes.
Analysis of separated layers and resulting emulsion morphologies.

Main Results:

Initial creaming of complex drops due to density differences.
Crowding in the upper layer induced coalescence and vegetable oil (VO) separation.
Sedimentation of denser, water-rich drops, forming various high internal ratio morphologies.
Final inversion to a stable SO/VO/W double emulsion layer.

Conclusions:

The destabilization pathway is driven by density changes following initial oil separation.
Crowding and coalescence are key intermediate steps in the breakdown process.
The system exhibits complex morphological transitions and eventual phase inversion.