论文标题
硬质胶体立方体在列液晶中的动力学
Dynamics of Hard Colloidal Cuboids in Nematic Liquid Crystals
论文作者
论文摘要
我们执行动态的蒙特卡洛模拟，以研究扁平和扁平的列液晶中硬胶体立方体的平衡动力学。特别是，我们表征粒子沿列型导演的扩散并垂直于其，并观察到一个强烈依赖粒子各向异性的结构弛豫衰变。为了评估其动力学的高斯性和集体运动的最终出现，我们计算了两点和四点相关函数，这些函数包含了平行的扩散系数的瞬时值，并垂直于列明主管。我们的仿真结果突出了长时间和长时间的高斯和高斯动力学的出现，在自偶形形状上定位最小扩散率，即优先稳定双轴刺激的粒子几何形状，并排除了动态相关的颗粒的存在。
We perform Dynamic Monte Carlo simulations to investigate the equilibrium dynamics of hard colloidal cuboids in oblate and prolate nematic liquid crystals. In particular, we characterise the particles' diffusion along the nematic director and perpendicularly to it, and observe a structural relaxation decay that strongly depend on the particle anisotropy. To assess the Gaussianity of their dynamics and eventual occurrence of collective motion, we calculate two- and four-point correlation functions that incorporate the instantaneous values of the diffusion coefficients parallel and perpendicular to the nematic director. Our simulation results highlight the occurrence of Fickian and Gaussian dynamics at short and long times, locate the minimum diffusivity at the self-dual shape, the particle geometry that would preferentially stabilise biaxial nematics, and exclude the existence of dynamically correlated particles.
