Variable on-demand release function of magnetoresponsive hybrid capsules

► Magnetoresponsive hybrid capsules were successfully prepared by collloid templating technique. ► The hybrid capsules consisted of polyelectrolytes, amphiphile bilayers and Fe3O4 nanoparticles (NPs). ► The deposition amount of Fe3O4 NPs is variable by changing the concentration of Fe3O4 NP dispersion. ► Encapsulated maerials were released on-demand by irradiation with an alternating magnetic field. ► The release rate of the capsules was variable by controlling the deposition amount of Fe3O4 NPs.