Abstract

We conduct Monte Carlo simulation for a simple model to elucidate alignments of multiple rigid rods confined within a rigid spherical cavity under crowding. For rods shorter than the cavity’s radius, depletion forces are essential. Rods distribute around cavity boundary with low orientation ordering in presence of rigid crowders. For rods longer than the cavity’s radius, they form a bundle in cavity interior and display nematic ordering by increasing crowding levels. Formation of nematic order is entropically favorable, which increases free space for crowders distributing around the cavity boundary. These findings are consistent with experimental results in the past literature.

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