Hard-sphere crystals with hcp and non-close-packed structure grown by colloidal epitaxy.
نویسندگان
چکیده
We demonstrate the epitaxial growth of a metastable (with respect to the bulk) hcp crystal as well as any other close-packed stacking sequence of colloidal hard spheres. At certain stretched and compressed lattices we furthermore observed growth of a non-close-packed superstructure and of a perfect (100)-aligned fcc crystal. Perfect template-induced hcp-crystal growth occurs at lattice spacings that are larger than for bulk crystallization, indicative of prefreezing. Small mismatches lead to increased out-of-plane displacements. Large mismatches prevent crystallization in the surface layers.
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عنوان ژورنال:
- Physical review letters
دوره 90 13 شماره
صفحات -
تاریخ انتشار 2003