Effect of bond connectivity on crystal nucleation of hard polymeric chains

Details Effect of bond connectivity on crystal nucleation of hard polymeric chains Effect of bond connectivity on crystal nucleation of hard polymeric chains

2012-04-24

arxiv.org/abs/1204.5398v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

We study the spontaneous nucleation and crystallization of linear and cyclic chains of flexibly connected hard spheres using extensive molecular dynamics simulations. To this end, we present a novel event-driven molecular dynamics simulation method, which is easy to implement and very efficient. We find that the nucleation rates are predominately determined by the number of bonds per sphere in the system, rather than the precise details of the chain topology, chain length, and polymer composition. O ur results thus show that the crystal nucleation rate of bead chains can be enhanced by adding monomers to the system. In addition, we find that the resulting crystal n uclei contain significantly more face-centered-cubic than hexagonal-close-packed ordered particles. More surprisingly, the resulting crystal nuclei possess a range of crystal morphologies including structures with a five-fold symmetry.

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