论文标题
通过在近晶型相中调整棒状颗粒的非量身度大小来加速动力学
Speeding up dynamics by tuning the non-commensurate size of rod-like particles in a smectic phase
论文作者
论文摘要
使用模拟，我们研究了杆状宿主颗粒的近晶型环境中类似杆状的来宾颗粒的扩散。我们发现，跨近晶层的来宾杆的动力学从快速的夜生形散射转变为通过中间切换机制缓慢的跳跃型动力学，通过改变宾夕法尼亚的间距的客体杆的长度。我们确定在层状环境中产生最快和最慢的扩散的最佳杆长度。我们表明，这种行为可以通过表现出两个能屏障的复杂的1D有效的周期电势可以合理化，从而导致客人在近晶层中的优选平均位置变化。这两个障碍的相互作用控制着来宾颗粒的动力学，其缓慢，中间体和快速扩散状态取决于粒子长度。
Using simulations, we study the diffusion of rod-like guest particles in a smectic environment of rod-like host particles. We find that the dynamics of guest rods across smectic layers changes from a fast nematic-like diffusion to a slow hopping-type dynamics via an intermediate switching regime by varying the length of the guest rods with respect to the smectic layer spacing. We determine the optimal rod length that yields the fastest and the slowest diffusion in a lamellar environment. We show that this behavior can be rationalized by a complex 1D effective periodic potential exhibiting two energy barriers, resulting in a varying preferred mean position of the guest particle in the smectic layer. The interplay of these two barriers controls the dynamics of the guest particles yielding a slow, an intermediate and a fast diffusion regime depending on the particle length.
