旋转磁场中微米级赤铁矿块的群集实验

The most energetically favorable configurations of hematite cube chains

Hematite at room temperature is a weak ferromagnetic material. Its permanent magnetization is three orders smaller than for magnetite. Thus, hematite colloids allow us to explore a different physical range of particle interaction parameters compared to ordinary ferromagnetic particle colloids. In this paper we investigate a colloid consisting of hematite particles with cubic shape. We search for energetically favorable structures in an external magnetic field with analytical and numerical methods and molecular dynamics simulations and analyze whether it is possible to observe them in experimen…

旋转的赤铁矿立方体链

Rotating hematite cube chains

本文研究旋转磁场中短赤铁矿立方体链的平衡结构与运动状态，发现三种平面运动及一种离面滚动追赶磁场的动力学，并经实验验证。

Exploiting anisotropic particle shape to electrostatically assemble colloidal molecules with high yield and purity

Hypothesis: Colloidal molecules with anisotropic shapes and interactions are powerful model systems for deciphering the behavior of real molecules and building units for creating materials with designed properties. While many strategies for their assembly have been developed, they typically yield a broad distribution or are limited to a specific type. We hypothesize that the shape and relative sizes of colloidal particles can be exploited to efficiently direct their assembly into colloidal molecules of desired valence. Experiments: We exploit electrostatic self-assembly of negatively charged s…

微观磁性粒子系统的宏观模拟

Macroscopic emulation of microscopic magnetic particle systems

本文提出用三维打印超球壳内置磁铁的宏观实验，模拟旋转磁场中赤铁矿立方体的微观动力学，并通过 ArUco 追踪验证其与理论预测定性一致。