Layer-by-Layer Growth of Binary Colloidal Crystals

Layer-by-Layer Growth of Binary Colloidal Crystals

We report the growth of binary colloidal crystals with control over the crystal orientation through a simple layer-by-layer process. Well-ordered single binary colloidal crystals with a stoichiometry of large (L) and small (S) particles of LS2and LS were generated. In addition, we observed the forma...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2002-04, Vol.296 (5565), p.106-109
Hauptverfasser: Velikov, Krassimir P, Christova, Christina G, Dullens, Roel P A, van Blaaderen, Alfons
Format: Artikel
Sprache:eng
Schlagworte:
Colloids
Composite particles
Crystal growth
Crystal lattices
Crystallography
Crystals
Drying
Fractions
Glass
Growth
Hexagonal crystals
Material concentration
Materials science
Physiological aspects
Polymers
Scientific Concepts
Stoichiometry
Thermodynamics
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Zusammenfassung:We report the growth of binary colloidal crystals with control over the crystal orientation through a simple layer-by-layer process. Well-ordered single binary colloidal crystals with a stoichiometry of large (L) and small (S) particles of LS2and LS were generated. In addition, we observed the formation of an LS3superstructure. The structures formed as a result of the templating effect of the first layer and the forces exerted by the surface tension of the drying liquid. By using spheres of different composition, one component can be selectively removed, as is demonstrated in the growth of a hexagonal non-close-packed colloidal crystal.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1067141