Ahyoung Kim1 Binbin Luo1 Qian Chen1

1, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States

We introduce anisometric plates as a new class of colloidal building blocks which combine micron length and nanoscale thickness. Such plates act against gravity and assemble into 3D lattices of controllable and transformational geometry, from hexagonal lattice of plate-stacked columns to honeycomb lattice of columns. Based on real-time tracking of the rotational and translational motions using optical microscopy, we resolve the self-assembly and transformation of the final lattices, which reveals a mechanism of rotational entropy-driven transformation.