Novel fully-nonlocal energy-based formulation and high-performance 3D numerical realization of the quasicontinuum method

Although the conference website says 500 words (http://www.cvent.com/events/ses-annual-technical-meeting/custom-35-756e8099c25a4c6d8f5cc4d34954c419.aspx), this form is enforcing 400. Furthermore, the abstract text I am pasting here is 391 words, and yet the form is still rejecting it. I give up, I have been conquered by this form. The abstract is attached as a document

Domain and stripe formation between hexagonal and square ordered fillings of colloidal particles on periodic pinning substrates

Using large scale numerical simulations, we examine the ordering of colloidal particles on square periodic two-dimensional muffin-tin substrates consisting of a flat surface with localized pinning sites. We show that when there are four particles per pinning site, the particles adopt a hexagonal ordering, while for five particles per pinning site, a square ordering appears. For fillings between four and five particles per pinning site, we identify a rich variety of distinct ordering regimes, including disordered grain boundaries, crystalline stripe structures, superlattice orderings, and disordered patchy arrangements. We characterize the different regimes using Voronoi analysis, energy dispersion, and ordering of the domains. We show that many of the boundary formation features we observe occur for a wide range of other fillings. Our results demonstrate that grain boundary tailoring can be achieved with muffin-tin periodic pinning substrates