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Spatial Confinement in Colloidal Crystals: the HCP-like phase

The video displays an animation depicting the phase transitions of a self-assambled colloidal crystal from bilayer or double layer triangular to three layer square.

The video starts by displaying a perspective view of two triangular layers of a colloidal crystal and then switches to an axonometric projection to illustrate the transition. The colloids combine to form microcrystallites that rotate in the same direction as the space between walls expands. This transitional phase is called the hcp-like phase and ultimately leads to a compact hcp phase, identified as (1 0 0) using three Miller indexes. To transition to the square phase, the microcrystallites undergo another selection and symmetric rotation. The video concludes by showing the compact square phase. It's worth noting that the triangular and square phases are facets of the fcc lattice, with Miller indexes (1 1 1) and (1 0 0), respectively. In this particular case, the triangular phase, being a bilayer, could also be part of the hcp phase.

From Journal article: Layering transitions in confined colloidal crystals: The hcp-like phase

F. Ramiro-Manzano, E. Bonet, I. Rodriguez and F. Meseguer, Physical Review E 76, 050401 (2007)


Video/movie reproduced from Reproduced from Ref. Physical Review E 76, 050401 (2007) with permission from the American Physical Society
Fernando Ramiro Manzano, PhD 
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