Universal two-step crystallization of DNA-functionalized nanoparticles

Details Universal two-step crystallization of DNA-functionalized nanoparticles Universal two-step crystallization of DNA-functionalized nanoparticles

2010-08-12

arxiv.org/abs/1008.2152v1

Physics

Condensed Matter

Soft Condensed Matter

Accepted for publication in Soft Matter

Scientific paper

We examine the crystallization dynamics of nanoparticles reversibly tethered by DNA hybridization. We show that the crystallization happens readily only in a narrow temperature "slot," and always proceeds via a two-step process, mediated by a highly-connected amorphous intermediate. For lower temperature quenches, the dynamics of unzipping strands in the amorphous state is sufficiently slow that crystallization is kinetically hindered. This accounts for the well-documented difficulty of forming crystals in these systems. The strong parallel to the crystallization behavior of proteins and colloids suggests that these disparate systems crystallize in an apparently universal manner.

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