Related Experiment Video
Updated: Jun 14, 2025
08:39
Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles
Published on: October 16, 2017
12.7K
Evaporative self-assembly in colloidal droplets: Emergence of ordered structures from complex fluids.
Weibin Li1, Chen Zhang1, Yuren Wang1
1National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China; School of Engineering Science, University of Chinese Academy of Sciences, 100049 Beijing, China.
Advances in Colloid and Interface Science
|September 4, 2024
Summary
Evaporative self-assembly of colloidal droplets offers a cost-effective method for creating ordered structures. Mitigating coffee ring effects is key for advanced applications in printed electronics and photonics.
Area of Science:
- Physical Chemistry
- Fluid Dynamics
- Soft Matter Science
Background:
- Colloidal droplet evaporation is a complex non-equilibrium process.
- Challenges include coffee ring formation and Marangoni effects, hindering precise deposition control.
Purpose of the Study:
- To review evaporative self-assembly in colloidal droplets.
- Focus on mechanical environment, interfacial self-assembly, and applications.
Main Methods:
- Analysis of evaporative self-assembly dynamics.
- Investigation of colloidal particle behavior at interfaces.
- Review of applications in various fields.
Main Results:
- Evaporative self-assembly enables cost-effective generation of ordered structures.
- Mitigating coffee rings is crucial for uniform deposition.
- Ordered structures have applications in inkjet printing, photonic crystals, and biochemical assays.
Conclusions:
- Evaporative self-assembly is a promising technique for fabricating functional patterns.
- Controlling deposition patterns is vital for next-generation flexible electronic devices.
- Further research into mechanical environments and interfaces can unlock new applications.
Related Concept Videos
03:22Colloids
17.4K
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...
17.4K
01:09Colloidal precipitates
528
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...
528
02:39Phase Transitions: Vaporization and Condensation
17.5K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.5K
01:17Colloids and Suspensions
1.7K
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 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...
1.7K
01:16Precipitate Formation and Particle Size Control
757
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...
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...
757
02:35Energetics of Solution Formation
6.7K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
6.7K