| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1647706 | Materials Letters | 2012 | 4 Pages |
We report a simple approach to synthesize emulsion of oleic acid (OA) containing Fe3O4-OA nanoparticles as magnetic building block of photonic crystals by combined chemical co-precipitation and emulsification technology. The emulsion droplets exhibit dominant size distribution of 80–110 nm and superparamagnetic behavior. A high loading fraction of magnetic compounds Fe3O4 in emulsion of 72% was achieved by the approach. Upon application of a magnetic field, the emulsion droplets in water facilely self-assemble into photonic crystals, and the stop bands could be tuned in ranging visible spectrum by moving position of magnet. The method to synthesize emulsion with high magnetic loading fraction should facilitate preparation of tunable photonic crystals and expand their application.
►An emulsion of oleic acid (OA) containing Fe3O4-OA nanoparticles was synthesized. ►The emulsion droplets exhibit a dominant size distribution of 80–110 nm. ►The superparamagnetic behavior and high magnetic loading fraction was achieved. ►Under a magnetic field the droplets facilely self-assemble into photonic crystals. ►The stop bands could be tuned in visible spectrum by moving position of magnet.
