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

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...

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...

Coagulation

Coagulation

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...

Colloids and Suspensions

Colloids and Suspensions

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...

Crystal Growth: Principles of Crystallization

Crystal Growth: Principles of Crystallization

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...

You might also read

Related Articles

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

Sort by

Same author

Adrenal insufficiency due to etomidate inhalation via electronic cigarettes: three local cases.

Hong Kong medical journal = Xianggang yi xue za zhi·2025

Same author

Squalene epoxidase as a novel therapeutic target in non-alcoholic fatty liver disease: abridged secondary publication.

Hong Kong medical journal = Xianggang yi xue za zhi·2025

Same author

A systematic review of autologous adipose-derived stromal vascular fraction (SVF) for the treatment of acute cutaneous wounds.

Archives of dermatological research·2021

Same author

Post-implantation Deformation of Titanium Rod and Cobalt Chrome Rod in Adolescent Idiopathic Scoliosis.

Malaysian orthopaedic journal·2019

Same author

Three Level Thoracolumbar Spondylectomy for Recurrent Giant Cell Tumour of the Spine: A Case Report.

Malaysian orthopaedic journal·2018

Same author

Programmed death ligand 1 expression in esophageal cancer following definitive chemoradiotherapy: Prognostic significance and association with inflammatory biomarkers.

Oncology letters·2018

Search research articles

Related Experiment Video

Updated: Jul 3, 2026

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

Layer-by-layer growth of attractive binary colloidal particles.

Kwan Wee Tan¹, Guang Li, Yaw Koon Koh

¹Singapore-MIT Alliance, N3.2-01-36, 65 Nanyang Drive, Singapore 637460.

Langmuir : the ACS Journal of Surfaces and Colloids

|July 26, 2008

Summary

This summary is machine-generated.

Electrostatic forces guide the self-assembly of oppositely charged polystyrene monolayers into diverse two-dimensional (2D) superlattices. Increasing ionic strength promotes closer packing, aligning with Debye screening length predictions.

More Related Videos

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Related Experiment Videos

Last Updated: Jul 3, 2026

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Area of Science:

Colloid science
Materials science
Surface chemistry

Background:

Layer-by-layer assembly is a technique for creating ordered thin films.
Electrostatic interactions play a crucial role in colloidal self-assembly.
Controlling interparticle forces is key to achieving desired superlattice structures.

Purpose of the Study:

To investigate the formation of 2D colloidal superlattices using oppositely charged polystyrene.
To understand the influence of electrostatic forces and ionic strength on layer packing.
To explore the potential for template-directed self-assembly of complex colloidal structures.

Main Methods:

Fabrication of layer-by-layer polystyrene monolayers with opposite charges.
Systematic variation of ionic strength in the colloidal suspension.
Analysis of resulting 2D superlattice structures and their geometrical packing.
Estimation of Debye screening length to correlate with observed structures.

Main Results:

Observed a transition from various 2D-superlattices to more close-packed structures with increasing ionic strength.
Geometrical packing constraints of superlattices showed good agreement with estimated Debye screening lengths.
Demonstrated that electrostatic interactions can enhance template-directed self-assembly.

Conclusions:

Electrostatic forces are effective in directing the self-assembly of 2D colloidal structures.
Ionic strength is a critical parameter for tuning the packing density and complexity of superlattices.
This approach offers a pathway to engineer diverse and complex colloidal architectures for advanced applications.