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Related Concept Videos

Colloids03:22

Colloids

21.2K
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...
21.2K
Colloids and Suspensions01:17

Colloids and Suspensions

3.5K
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...
3.5K
Colloidal precipitates01:09

Colloidal precipitates

6.5K
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...
6.5K
Guidelines for Writing Outcome01:11

Guidelines for Writing Outcome

4.0K
When developing expected outcomes for a patient care plan, the nurse should adhere to the following recommendations:
Patient outcomes reflect the patient's response to the goal rather than what the nurse aims to achieve. Terminology should be observable and measurable to avoid the reader's interpretation. The desired outcome should be realistic and achievable in the designated care timeframe. Expected outcomes should align with adjunctive therapies. The outcome should enhance care...
4.0K
Protein Complex Assembly02:41

Protein Complex Assembly

16.8K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.8K
Directing Effect of Substituents: meta-Directing Groups01:09

Directing Effect of Substituents: meta-Directing Groups

6.0K
Substituents on the benzene ring that direct an incoming electrophile to undergo substitution at the meta position are called meta directors. All meta directors either have a positive charge on the atom directly bonded to the ring or a partial positive charge. These groups function by withdrawing electrons from the ring through inductive and resonance effects. Consider the carbocation intermediates formed upon the addition of an electrophile on nitrobenzene at the...
6.0K

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Related Experiment Video

Updated: Feb 6, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Direct-Write Freeform Colloidal Assembly.

Alvin T L Tan1, Justin Beroz2, Mathias Kolle2

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA, 02139, USA.

Advanced Materials (Deerfield Beach, Fla.)
|August 31, 2018
PubMed
Summary
This summary is machine-generated.

Direct-write colloidal assembly enables the creation of large, free-standing colloidal crystal structures. This 3D printing approach allows for tailored material properties and novel applications in photonics and electronics.

Keywords:
additive manufacturingcolloidsnanoparticlesself-assemblystructural color

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Colloidal assembly controls material properties through particle characteristics and arrangement.
  • Existing methods are limited to films, patterns, or microscale confinements.
  • Freeform colloidal crystal structures have remained unachievable.

Purpose of the Study:

  • Introduce direct-write colloidal assembly for fabricating freeform colloidal crystals.
  • Develop a method combining self-assembly with 3D printing.
  • Enable centimeter-scale, free-standing colloidal structures.

Main Methods:

  • Utilized direct-write colloidal assembly, integrating bottom-up self-assembly with 3D printing.
  • Derived a scaling law for assembly rate.
  • Experimented with polystyrene, silica, and gold particles.

Main Results:

  • Successfully built centimeter-scale, free-standing colloidal structures.
  • Demonstrated tailoring of macroscale structural color by controlling particle size and ordering.
  • Fabricated diverse structures using various colloidal building blocks.

Conclusions:

  • Direct-write colloidal assembly overcomes limitations of previous methods.
  • This technique offers control over material properties and structure.
  • Potential applications include novel composites, photonics, and electronics.