Bio-Nano Electronics Research Center, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan.
Langmuir. 2011 Aug 2;27(15):9160-4. doi: 10.1021/la201156q. Epub 2011 Jul 6.
We apply ac and dc magnetic fields simultaneously in orthogonal directions to each other to a solution, in which paramagnetic microparticles are dispersed, and show that complex secondary structures composed of oscillating chain clusters, that is, long linear clusters interconnected by T-, L-, and criss-cross-junctions, are self-assembled. Disklike clusters are formed at some junctions and the number of disklike clusters increases as the frequency of the ac magnetic field increases. We finally show that the angle between long linear clusters can be altered by changing the ratio of the intensities of the ac and dc magnetic fields.
我们将交流和直流磁场同时应用于彼此正交的方向上，作用于一个分散有顺磁微粒子的溶液中，并展示出由链簇的振荡组成的复杂二级结构，即由 T 型、L 型和十字交叉型连接的长线性簇的自组装。在某些连接点形成了盘状簇，并且随着交流磁场频率的增加，盘状簇的数量增加。我们最终表明，通过改变交流和直流磁场强度的比值，可以改变长线性簇之间的角度。
