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Issue 21, 2018
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Simple preparation of magnetic field-responsive structural colored Janus particles

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Abstract

We established a simple method for preparing Janus particles displaying different structural colors using submicron-sized fine silica particles and magnetic nanoparticles composed of Fe3O4. A w/o emulsion is prepared by vortex-stirring a mixed aqueous solution of suspended fine silica particles and magnetic nanoparticles and of hexadecane containing an emulsifier. Subsequent drying of the emulsion on a hot plate using a magnetic stirrer provides a polydisperse particle aggregate displaying two different structural colors according to the ratio of the amount of fine silica particles to the amount of magnetic nanoparticles. This polydisperse particle aggregate can be converted into monodisperse particles simply by using a sieve made of stainless steel. In the presence of a magnet, the monodisperse Janus particles can change their orientation and can switch between two different structural colors.

Graphical abstract: Simple preparation of magnetic field-responsive structural colored Janus particles

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Supplementary files

Article information


Submitted
14 Dec 2017
Accepted
14 Jan 2018
First published
15 Jan 2018

Chem. Commun., 2018,54, 2607-2610
Article type
Communication

Simple preparation of magnetic field-responsive structural colored Janus particles

M. Teshima, T. Seki and Y. Takeoka, Chem. Commun., 2018, 54, 2607
DOI: 10.1039/C7CC09464G

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