Costa Campos L Q, Apolinario S W S, Löwen H
Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil.
Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Oct;88(4):042313. doi: 10.1103/PhysRevE.88.042313. Epub 2013 Oct 29.
The structure of colloids with competing interactions which are confined in a harmonic external trap potential is analyzed numerically by energy minimization in two spatial dimensions. A wealth of different cluster structures is found to be stable including clusters with a fringed outer rim (reminiscent to an ornamental border), clusters perforated with voids, as well as clusters with a crystalline core and a disordered rim. All cluster structures occur in a two-dimensional parameter space. The structural ordering can therefore be efficiently tuned by changing few parameters only providing access to a controlled fabrication of colloidal clusters.
通过二维空间中的能量最小化，对处于谐波外部陷阱势中的具有竞争相互作用的胶体结构进行了数值分析。发现大量不同的团簇结构是稳定的，包括具有边缘外边缘的团簇（让人联想到装饰边框）、有孔洞的团簇以及具有晶核和无序边缘的团簇。所有团簇结构都出现在二维参数空间中。因此，仅通过改变几个参数就可以有效地调整结构有序性，从而实现对胶体团簇的可控制造。
