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

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...
Colloids and Suspensions01:17

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...
The Colloidal State01:29

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...
Colloids03:22

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...
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Liquid–Solid Solutions01:29

Liquid–Solid Solutions

The process of a solid dissolving in a liquid to form a solution is governed by the solubility limit, which is the maximum amount of the solid substance, or solute, that can be dissolved in a specific volume of the liquid or solvent. As the solute dissolves, it reaches a point where no more solute can be dissolved at a given temperature - this is known as the saturation point. However, if further solute is added and it manages to dissolve, the solution becomes supersaturated. Supersaturated...

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

Related Experiment Video

Updated: May 19, 2026

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
12:04

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

Soft Janus colloidal crystal film.

Syuji Fujii1, Michael Kappl, Hans-Jürgen Butt

  • 1Department of Applied Chemistry, Faculty of Engineering, Asahi-ku, Osaka, Japan. s.fujii@chem.oit.ac.jp

Angewandte Chemie (International Ed. in English)
|September 1, 2012
PubMed
Summary
This summary is machine-generated.

Soft Janus colloidal films were fabricated using polystyrene particles as a mold for polypyrrole cups. These flexible films can be shaped onto curved surfaces, enabling new applications in microfluidics.

More Related Videos

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array
09:55

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array

Published on: June 23, 2017

Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
09:09

Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability

Published on: February 27, 2016

Related Experiment Videos

Last Updated: May 19, 2026

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
12:04

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array
09:55

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array

Published on: June 23, 2017

Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
09:09

Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability

Published on: February 27, 2016

Area of Science:

  • Materials Science
  • Nanotechnology
  • Colloid Science

Background:

  • Two-dimensional colloidal crystals offer unique templating capabilities.
  • Soft "Janus" films combine flexibility with patterned structures.
  • Polypyrrole is a versatile conducting polymer for various applications.

Purpose of the Study:

  • To develop a novel method for creating soft "Janus" two-dimensional colloidal crystal films.
  • To produce femtoliter-sized cups using a templating approach.
  • To demonstrate the transferability of these films onto curved substrates.

Main Methods:

  • Fabrication of two-dimensional colloidal crystal films using polystyrene (PS) particles at an air-water interface.
  • Using the PS particle array as a mold for a flexible polypyrrole layer.
  • Removal of PS particles to generate an array of femtoliter-sized cups.

Main Results:

  • Successfully created soft "Janus" two-dimensional colloidal crystal films.
  • Produced an array of femtoliter-sized cups after removing the PS templates.
  • Demonstrated the ability to transfer these films onto substrates with curvature.

Conclusions:

  • Soft "Janus" colloidal crystal films provide a versatile platform for creating micro-scale structures.
  • The templating method enables the fabrication of precisely sized cups for potential microfluidic applications.
  • The film's adaptability to curved surfaces broadens its applicability in flexible electronics and devices.