Shape-designed frustration by local polymorphism in a near-equilibrium colloidal glass

摘要: We show that hard, convex, lithographic, prismatic kite platelets, each having three 72° vertices and one 144° vertex, preferentially form a disordered arrested 2D glass when concentrated quasi-statically in monolayer while experiencing thermal Brownian fluctuations. By contrast with systems of other hard convex shapes, such as squares, rhombs, pentagons, which readily crystals at high densities, kites retain liquid-like structure becomes frozen-in their long-time translational rotational diffusion become highly bounded, yielding colloidal glass. This robust glass-forming propensity arises from competition between diverse few-particle local polymorphic configurations (LPCs) have incommensurate features symmetries. Thus, entropy maximization is consistent the preservation LPCs en route to