Self-limited self-assembly of chiral filaments

Details Self-limited self-assembly of chiral filaments Self-limited self-assembly of chiral filaments

2010-01-26

arxiv.org/abs/1001.4780v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 5 figures

Scientific paper

The assembly of filamentous bundles with controlled diameters is common in biological systems and desirable for the development of nanomaterials. We discuss dynamical simulations and free energy calculations on patchy spheres with chiral pair interactions that spontaneously assemble into filamentous bundles. The chirality frustrates long-range crystal order by introducing twist between interacting subunits. For some ranges of system parameters this constraint leads to bundles with a finite diameter as the equilibrium state, and in other cases frustration is relieved by the formation of defects. While some self-limited structures can be modeled as twisted filaments arranged with local hexagonal symmetry, other structures are surprising in their complexity.

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