Entropically driven colloidal crystallization on patterned surfaces


Lin, K. H. ; Crocker, J. C. ; Prasad, V. ; Schofield, A. ; Weitz, D. A. ; Lubensky, T. C. ; Yodh, A. G. Entropically driven colloidal crystallization on patterned surfaces. Physical Review Letters 2000, 85, 1770-1773. Copy at http://www.tinyurl.com/lkr7cdb
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We investigate the self-assembly of colloidal spheres on periodically patterned templates. The surface potentials and the surface phases are induced entropically by the presence of dissolved, nonadsorbing polymers. A rich variety of two-dimensional fluidlike and solidlike phases was observed to form on template potentials with both one- and two-dimensional symmetry. The same methodology was then used to nucleate an oriented single fee crystal more than 30 layers thick. The general approach provides a new route for directed self-assembly of novel mesoscopic structures.


Times Cited: 189

Last updated on 03/20/2014