二次元凝集体における空間分解高速ダイナミクスが凝集メカニズムを明らかにする

Two typical morphologies of two-dimensional aggregates are considered: compact crystalline clusters and string-like non-compact conformations. Simulated trajectories of both types of aggregates are analysed with fine spatial resolution. While the long-time geometry of such trajectories appears to be statistically identical for the two conformations, the self-overlap statistics reveal two distinct short-time pre-caging mechanisms. While the length-scale is directly proportional to the time-scale for particles in compact aggregates, a non-monotonic relationship holds for non-compact clusters. The relationship between short length-scale and fast time-scale for particle localization might hold the key to the structure-function relationship of aggregate forming systems and other non-equilibrium soft materials.