Magnetic manipulation of self-assembled colloidal asters
Magnetic manipulation of self-assembled colloidal asters
复制标题
DOI：
10.1038/nmat3083
复制
发表时间：
2011-09-01
期刊：
影响因子：
41.2
通讯作者：
Aranson, Igor S.
中科院分区：
文献类型：
--
作者：
Snezhko, Alexey;Aranson, Igor S.
自组装材料（1-4）必须积极消耗能量并保持不平衡，以支持结构复杂性和功能多样性（1，5）。在这里，我们表明，磁胶体悬浮液限制在两个不混溶的液体之间的界面和通电的交变磁场动态自组装成本地的星和阵列的星，表现出运动和形状的变化。通过控制一个小的外部磁场施加平行的接口，我们表明，星可以捕获，运输和定位目标微粒。操纵胶体结构的能力对于自组装微型机器人的进一步发展至关重要。
Self-assembled materials(1-4) must actively consume energy and remain out of equilibrium to support structural complexity and functional diversity(1,5). Here we show that a magnetic colloidal suspension confined at the interface between two immiscible liquids and energized by an alternating magnetic field dynamically self-assembles into localized asters and arrays of asters, which exhibit locomotion and shape change. By controlling a small external magnetic field applied parallel to the interface, we show that asters can capture, transport, and position target microparticles. The ability to manipulate colloidal structures is crucial for the further development of self-assembled microrobots.