Using a coarse-grained model, we have explored the emergent structure and dynamics of nanoparticles arising from pair-wise interactions that are tailored according to pre-selected surface patterns. Perhaps surprisingly, Janus particles (those with oppositely charged hemispheres), were seen to exhibit similar equilibrium structure as uniformly interacting particles. [J. Chem. Phys. 137, 044505 (2012)] Their dynamics, however, are quite sensitive to the patterning of the surface [J. Chem. Phys. 138, 184903 (2013)] thereby offering exquisite chemical control of the structure. Coarse-graining of the particles into spherically symmetric interactions also leads to different time scales in the structuring of the particles than that which can be captured by time-rescaling or uniform dissipative mechanism. Higher-multiplicity striped particles (beyond the two found in Janus particles) offer the possibility that commensurability in the overlap of the stripes can give rise to dramatic density effects on their structure. [J. Chem. Phys., 140, 034701 (2014).] We will report the behavior for a range of stripes up to seven and examine the trends for even and odd patterns.

Emergent structure and dynamics of patchy coarse-grained nanoparticles

251st National Meeting (2016)

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