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Layer-by-Layer Growth of Binary Colloidal Crystals

Science  05 Apr 2002:
Vol. 296, Issue 5565, pp. 106-109
DOI: 10.1126/science.1067141

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Abstract

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 LS2 and 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.

  • * To whom correspondence should be addressed. E-mail: k.p.velikov{at}phys.uu.nl, a.vanblaaderen{at}phys.uu.nl

  • Present address: Van't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands.

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