Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1, Katahira, Sendai, Japan.
ACS Appl Mater Interfaces. 2013 Apr 24;5(8):3262-6. doi: 10.1021/am4003149. Epub 2013 Apr 2.
In this report, we show a simple route to fabricate Janus particles having magnetic nanoparticles inside them, which can respond and rotate along to magnetic fields. By solvent evaporation from the tetrahydrofran solution of polymer stabilized γ-Fe2O3 nanoparticles, polystyrene (PS), and polyisoprene containing water, aqueous dispersion of Janus microparticles were successfully prepared, and the γ-Fe2O3 nanoparticles were selectively introduced into the PS phase. We demonstrate rotation and accumulation of Janus particles by using a neodymium magnet.
在本报告中，我们展示了一种简单的方法来制备具有内部磁性纳米粒子的 Janus 粒子，这些粒子可以沿着磁场响应和旋转。通过从聚合物稳定的γ-Fe2O3纳米粒子、聚苯乙烯（PS）和含有水的聚异戊二烯的四氢呋喃溶液中蒸发溶剂，成功制备了 Janus 微粒子的水相分散体，并且γ-Fe2O3纳米粒子被选择性地引入 PS 相中。我们通过使用钕磁铁展示了 Janus 粒子的旋转和聚集。
