Icosahedral packing of polymer-tethered nanospheres and stabilization of the gyroid phase

Details Icosahedral packing of polymer-tethered nanospheres and stabilization of the gyroid phase Icosahedral packing of polymer-tethered nanospheres and stabilization of the gyroid phase

2007-02-08

arxiv.org/abs/cond-mat/0702224v2

Phys. Rev. E 75, 040801 (2007)

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 4 figures

Scientific paper

10.1103/PhysRevE.75.040801

We present results of molecular simulations that predict the phases formed by the self-assembly of model nanospheres functionalized with a single polymer "tether", including double gyroid, perforated lamella and crystalline bilayer phases. We show that microphase separation of the immiscible tethers and nanospheres causes confinement of the nanoparticles, which promotes local icosahedral packing that stabilizes the gyroid and perforated lamella phases. We present a new metric for determining the local arrangement of particles based on spherical harmonic "fingerprints", which we use to quantify the extent of icosahedral ordering.

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