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ACS Appl Mater Interfaces. 2013 Apr 24;5(8):3262-6. doi: 10.1021/am4003149. Epub 2013 Apr 2.

Polymer Janus particles containing block-copolymer stabilized magnetic nanoparticles.

Author information

1
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1, Katahira, Sendai, Japan. yabu@tagen.tohoku.ac.jp

Abstract

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.

PMID:
23480421
DOI:
10.1021/am4003149

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