Polymer Janus Particles Containing Block-Copolymer Stabilized Magnetic Nanoparticles

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• 作者：Hiroshi Yabu ; Masaaki Kanahara ; Masatsugu Shimomura ; Toshihiko Arita ; Koji Harano ; Eiichi Nakamura ; Takeshi Higuchi ; Hiroshi Jinnai
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：April 24, 2013
• 年：2013
• 卷：5
• 期：8
• 页码：3262-3266
• 全文大小：312K
• 年卷期：v.5,no.8(April 24, 2013)
• ISSN：1944-8252

文摘

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 纬-Fe₂O₃ nanoparticles, polystyrene (PS), and polyisoprene containing water, aqueous dispersion of Janus microparticles were successfully prepared, and the 纬-Fe₂O₃ nanoparticles were selectively introduced into the PS phase. We demonstrate rotation and accumulation of Janus particles by using a neodymium magnet.

Keywords:

phase separation; Janus particles; magnetic response; self-assembly; polymer particles