Lima E O, Pereira P C N, Löwen H, Apolinario S W S
Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.
J Phys Condens Matter. 2018 Aug 15;30(32):325101. doi: 10.1088/1361-648X/aad14f. Epub 2018 Jul 5.
We investigate the structural properties of colloidal particle systems interacting via an isotropic pair potential and confined by a three-dimensional harmonic potential. The interaction potential has a repulsive-attractive-repulsive profile that varies with the interparticle distance (also known as a 'mermaid' potential). We performed Langevin dynamics simulations to find the equilibrium configurations of the system. We show that particles can self-assemble in complex structural patterns, such as compact disks, fringed disks, rods, spherical clusters with superficial entrances among others. Also, for particular values of the parameters of the interaction potential, we could identify that some configurations were formed by quasi two-dimensional (2D) structures which are stable for 2D systems.
我们研究了通过各向同性对势相互作用并受三维谐振子势限制的胶体粒子系统的结构特性。相互作用势具有随粒子间距离变化的排斥-吸引-排斥轮廓（也称为“美人鱼”势）。我们进行了朗之万动力学模拟以找到系统的平衡构型。我们表明粒子可以自组装成复杂的结构模式，例如致密盘、边缘盘、棒、具有表面入口的球形簇等。此外，对于相互作用势参数的特定值，我们可以确定一些构型是由准二维（2D）结构形成的，这些结构对于二维系统是稳定的。
