论文标题
二进制胶体系统中的亚arhenius扩散
Sub-Arrhenius diffusion in a binary colloidal system
论文作者
论文摘要
使用分子动力学模拟研究了遭受外部电势屏障的二元胶体混合物的动力学。混合物的潜在屏障和较大组件之间的耗竭相互作用显着改变了系统的动力学。较大的颗粒会经历亚arhenius扩散，而较小的颗粒遵守正常的Arrhenius扩散。这些结果表明，与文献中的一般一致相反，量子现象（例如隧穿等隧道的扩散不足）。外部电势层和较大成分之间的耗尽相互作用随温度降低而增加，这使得越过越过的有效激活能量取决于距离亚线肌扩散。
The dynamics of binary colloidal mixture subjected to an external potential barrier is investigated using molecular dynamics simulations. The depletion interactions between the potential barrier and larger components of the mixture alters the dynamics of the system significantly. The larger particles undergo sub-Arrhenius diffusion while smaller particles obey normal Arrhenius diffusion. These results show that quantum phenomena such as tunneling is not required to have sub-Arrhenius diffusion, in contrast to the general agreement in the literature. The depletion interactions between the external potential barrier and larger component increases with decreasing temperature which makes the effective activation energy for barrier crossing temperature dependent leading to sub-Arrhenius diffusion.
