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Related Concept Videos

Colloids03:22

Colloids

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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...
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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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Colloids and Suspensions01:17

Colloids and Suspensions

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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...
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Colloidal precipitates01:09

Colloidal precipitates

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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...
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Molecular Shapes01:18

Molecular Shapes

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Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
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Shape-Tunable Colloids from Structured Liquid Droplet Templates.

Zhang Luo1,2, Bing Liu1

  • 1State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Angewandte Chemie (International Ed. in English)
|February 15, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method for continuously tuning colloidal particle shapes, enabling precise control over self-assembly. This technique allows for the creation of diverse anisotropic colloids, from discs to dumbbells, advancing materials science.

Keywords:
anisotropycolloidssilicastructured dropletstemplate synthesis

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Area of Science:

  • Materials Science
  • Colloid Science
  • Nanotechnology

Background:

  • Colloidal building units are crucial for self-assembly into complex structures.
  • Achieving continuous shape tunability in colloids is essential for understanding self-assembly but remains a significant challenge.

Purpose of the Study:

  • To develop a novel template strategy for the shape-tunable synthesis of anisotropic colloids.
  • To enable continuous shape control of colloids from discs to spheres, theta shapes, and dumbbells.

Main Methods:

  • Utilizing structured, shape-tunable droplets derived from patchy colloidal discs as templates.
  • Investigating controlled dumbbell-to-eyeball droplet transformations for specific colloid synthesis.
  • Demonstrating droplet transformation pathways and applying the method to synthesize colloidal molecules.

Main Results:

  • Successfully synthesized anisotropic colloids with continuously tunable shapes.
  • Demonstrated a controlled transformation for producing eyeball-shaped colloids.
  • Validated the method for creating colloidal molecules with potential for ordered packing.

Conclusions:

  • The developed template strategy offers a versatile approach for shape-tunable colloid synthesis.
  • This method facilitates the exploration of ordered packing structures of anisotropic colloids.
  • The technique is adaptable for synthesizing other functional colloidal particles.