Liu Y H, Chew L Y, Yu M Y
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Dec;78(6 Pt 2):066405. doi: 10.1103/PhysRevE.78.066405. Epub 2008 Dec 18.
Self-assembly of minimum-energy configurations of a two-dimensional system consisting of charged particles confined in a quadratic trap and interacting through competing repulsive and attractive interparticle forces is studied by means of molecular dynamics simulation. It is shown that complex configurations, including concentric shells separated by bandlike voids, connected shells with multiple regularly arranged voids, as well as small clusters of particles organized into crystal- or liquidlike structures, can exist. With increase of the particle number, a larger variety of structural patterns becomes possible. The results here are useful for a better understanding of pattern formation in two-dimensional systems, as well as in the design of specific structures for technological applications.
通过分子动力学模拟研究了二维系统中最小能量构型的自组装情况，该二维系统由限制在二次势阱中的带电粒子组成，粒子间通过相互竞争的排斥力和吸引力相互作用。结果表明，可能存在复杂的构型，包括由带状空隙分隔的同心壳层、具有多个规则排列空隙的相连壳层，以及组织成晶体或类液体结构的小粒子团簇。随着粒子数目的增加，更多种类的结构模式变得可能。这里的结果有助于更好地理解二维系统中的图案形成，以及用于技术应用的特定结构的设计。
