The Structure and Dynamics of Patterned Nanospheres - Rigoberto Hernandez

Colloidal dispersions have been useful for many applications, particularly because of the balance of microscopic heterogeneity and the wealth of tunable properties they exhibit at macroscopic length scales. At the small extreme of nanoparticles, the patterning on the surface can be controlled through chemistry. An assembly of nanospheres can consequently exhibit a wealth of structural properties. 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)]. Course-graining of the particles into spherically symmetric interactions 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. Pnys., 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.

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