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Related Experiment Videos

Mesocrystals: inorganic superstructures made by highly parallel crystallization and controlled alignment.

Helmut Cölfen1, Markus Antonietti

  • 1Max-Planck-Institute of Colloids and Interfaces, Colloid Chemistry, Research Campus Golm, 14424 Potsdam, Germany. Coelfen@mpikg.mpg.de

Angewandte Chemie (International Ed. in English)
|July 22, 2005
PubMed
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Controlled nanoparticle self-organization creates novel materials via mesocrystals. These intermediate structures, formed using additives, offer new pathways for crystal development independent of traditional solubility limits.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Crystallography

Background:

  • Controlled self-organization of nanoparticles is key to developing novel materials.
  • Colloidal crystallization of non-spherical nanocrystals is a common reaction pathway.
  • Additives can halt crystallization at the mesocrystal stage, preserving identifiable primary units.

Purpose of the Study:

  • To investigate the formation and properties of mesocrystals as intermediate structures in nanoparticle self-organization.
  • To understand the control forces and mechanisms governing mesocrystal formation.
  • To explore the potential of mesocrystals in nonclassical crystallization strategies.

Main Methods:

  • Utilizing additives to control colloidal crystallization processes.

Related Experiment Videos

  • Observing and analyzing mesocrystal formation in various nanocrystal systems.
  • Characterizing mesocrystal properties and their role as intermediates.

    • Main Results:

    • Mesocrystals were observed as kinetically metastable species or intermediates in crystallization.
    • These structures represent a nonclassical crystallization route, distinct from ion-by-ion attachment.
    • Mesocrystal formation is less dependent on ion products or solubility and occurs without significant pH or osmotic pressure changes.

    Conclusions:

    • Mesocrystals are significant examples of nonclassical crystallization driven by modular nanobuilding blocks.
    • Understanding mesocrystal formation opens new avenues for crystal engineering and morphogenesis.
    • This approach offers alternative strategies for material synthesis, bypassing traditional crystallization constraints.