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

Colloidal precipitates01:09

Colloidal precipitates

1.1K
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...
1.1K
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

1.3K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
1.3K
Colloids03:22

Colloids

18.7K
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...
18.7K
Colloids and Suspensions01:17

Colloids and Suspensions

2.5K
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...
2.5K

You might also read

Related Articles

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

Sort by
Same author

How Spontaneous Electrowetting and Surface Charge Affect Drop Motion.

Physical review letters·2026
Same author

Fabrication of Janus Supraparticles by Induced Phase Separation by Gravity.

ACS nano·2026
Same author

Wetting of granular and porous materials.

Advances in colloid and interface science·2026
Same author

Transparent and airtight silica nano- and microchannels with uniform tubular cross-section.

Soft matter·2026
Same author

Water Drops Sliding Over Arrays of Janus Micropillars With Hydrophilic Tops: A New Mechanism of Drop Charging.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Dynamic Contact Angles on Moving Fibers Measured by X-ray Holography.

Langmuir : the ACS journal of surfaces and colloids·2026
Same journal

Porous flexible structure mediated synergistic boost of built-in electric field and photothermal effect for enhanced photocatalysis.

Journal of colloid and interface science·2026
Same journal

Bi/Bi<sub>2</sub>Ce<sub>2</sub>O<sub>7</sub> heterojunctions for visible-light photocatalytic nitrogen fixation: Synergistic enhancement by localized surface plasmon resonance and oxygen vacancies.

Journal of colloid and interface science·2026
Same journal

Interface engineering of ultrathin nickel metallene on titanium dioxide nanosheets for efficient photocatalytic hydrogen evolution.

Journal of colloid and interface science·2026
Same journal

Magnetic Janus droplets as soft robots.

Journal of colloid and interface science·2026
Same journal

Defect-induced hydrophilic CuMOF -modified CuBi<sub>2</sub>O<sub>4</sub> for nitrate to ammonia reduction.

Journal of colloid and interface science·2026
Same journal

Membrane lipid composition and amino acid sequence determine binding of SARS-CoV-2 fusion peptides.

Journal of colloid and interface science·2026
See all related articles

Related Experiment Video

Updated: Oct 18, 2025

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.1K

Controlling supraparticle shape and structure by tuning colloidal interactions.

Wendong Liu1, Michael Kappl2, Werner Steffen2

  • 1School of Chemical Engineering, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China; Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.

Journal of Colloid and Interface Science
|September 30, 2021
PubMed
Summary
This summary is machine-generated.

Adding salt to drying colloidal suspensions on superhydrophobic surfaces changes supraparticle shape and internal structure. Salt concentration controls colloid interactions, influencing assembly and crystallization for tailored supraparticle design.

Keywords:
AssemblyColloidCrystallizationEvaporationForcesSuperamphiphobic surfaceSupraparticle

More Related Videos

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.9K
Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
06:16

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

15.5K

Related Experiment Videos

Last Updated: Oct 18, 2025

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.1K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.9K
Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
06:16

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

15.5K

Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Nanotechnology

Background:

  • Colloidal assembly into supraparticles is driven by interparticle forces during drying.
  • Superhydrophobic surfaces promote specific assembly behaviors.
  • Controlling supraparticle morphology and internal structure is key for advanced materials.

Purpose of the Study:

  • To investigate the effect of salt (electrolyte) concentration on colloid interactions and supraparticle assembly.
  • To understand how salt influences the shape and internal structure of supraparticles formed during drying on a superhydrophobic surface.
  • To establish a correlation between salt concentration, colloid interactions, and supraparticle characteristics.

Main Methods:

  • Drying of electrostatically stabilized polystyrene particle suspensions with varying salt concentrations on a superhydrophobic surface.
  • Characterization of supraparticle morphology and internal structure using scanning electron microscopy.
  • Measurement of single colloid interaction forces using colloidal probe atomic force microscopy.

Main Results:

  • Addition of salt induced a shape transition from spherical to nonspherical supraparticles.
  • The degree of internal crystallization was dependent on salt concentration.
  • Observed changes were linked to salt-dependent colloid interaction forces, particularly in radial evaporation.

Conclusions:

  • Salt concentration is a critical parameter for controlling supraparticle assembly and properties.
  • Understanding salt-mediated interactions provides a pathway for designing complex supraparticles.
  • Findings offer guidance for fabricating supraparticles for specific applications.