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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...

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Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications
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Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications

Published on: November 17, 2015

Colloidal InSb nanocrystals.

Wenyong Liu1, Angela Y Chang, Richard D Schaller

  • 1Department of Chemistry and James Frank Institute, University of Chicago, Illinois 60637, United States.

Journal of the American Chemical Society
|December 4, 2012
PubMed
Summary
This summary is machine-generated.

Colloidal synthesis of Indium Antimonide (InSb) nanocrystals yields tunable near-infrared optical properties. Core-shell structures enhance photoluminescence, and InSb films exhibit ambipolar charge transport.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid-State Physics

Background:

  • Indium Antimonide (InSb) is a key III-V semiconductor with significant optoelectronic potential.
  • Precise control over nanocrystal size and properties is crucial for advanced applications.

Purpose of the Study:

  • To achieve colloidal synthesis of monodisperse InSb nanocrystals (NCs).
  • To investigate the optical and electronic properties of these InSb NCs and their core-shell variants.

Main Methods:

  • Colloidal synthesis of monodisperse InSb NCs.
  • Fabrication of InSb/CdSe and InSb/CdS core-shell nanostructures.
  • Characterization of optical properties (excitonic transitions, photoluminescence).
  • Investigation of charge transport in InSb NC films.

Main Results:

  • Monodisperse InSb NCs with tunable optical band gaps from 1.03 eV (1200 nm) to 0.71 eV (1750 nm) were synthesized.
  • Size-tunable band edge photoluminescence was observed.
  • Photoluminescence was significantly enhanced in InSb/CdSe and InSb/CdS core-shell nanostructures.
  • Films of InSb NCs capped with S(2-) ions demonstrated ambipolar charge transport.

Conclusions:

  • Colloidal InSb NCs offer tunable near-infrared optical properties.
  • Core-shell strategies effectively enhance photoluminescence.
  • InSb NC films show promise for ambipolar electronic devices.