Colloidal crystal growth at externally imposed nucleation clusters

Details Colloidal crystal growth at externally imposed nucleation clusters Colloidal crystal growth at externally imposed nucleation clusters

2008-02-15

arxiv.org/abs/0802.2235v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.108302

We study the conditions under which and how an imposed cluster of fixed colloidal particles at prescribed positions triggers crystal nucleation from a metastable colloidal fluid. Dynamical density functional theory of freezing and Brownian dynamics simulations are applied to a two-dimensional colloidal system with dipolar interactions. The externally imposed nucleation clusters involve colloidal particles either on a rhombic lattice or along two linear arrays separated by a gap. Crystal growth occurs after the peaks of the nucleation cluster have first relaxed to a cutout of the stable bulk crystal.

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