Carstensen Hauke, Kapaklis Vassilios, Wolff Max
Department of Physics and Astronomy, Box 516, SE-75120, Uppsala, Sweden.
Eur Phys J E Soft Matter. 2018 Jan 23;41(1):9. doi: 10.1140/epje/i2018-11615-x.
Colloidal systems offer unique opportunities for the study of phase formation and structure since their characteristic length scales are accessible to visible light. As a model system the two-dimensional assembly of colloidal magnetic and non-magnetic particles dispersed in a ferrofluid (FF) matrix is studied by transmission optical microscopy. We present a method to statistically evaluate images with thousands of particles and map phases by extraction of local variables. Different lattice structures and long-range connected branching chains are observed, when tuning the effective magnetic interaction and varying particle ratios.
胶体系统为研究相形成和结构提供了独特的机会，因为它们的特征长度尺度在可见光范围内。作为一个模型系统，通过透射光学显微镜研究了分散在铁磁流体（FF）基质中的胶体磁性和非磁性颗粒的二维组装。我们提出了一种方法，用于对含有数千个颗粒的图像进行统计评估，并通过提取局部变量来绘制相图。当调节有效磁相互作用并改变颗粒比例时，观察到了不同的晶格结构和长程连接的分支链。
