Figure 1: Principle of magnetically controlled drug release using PNIPAM microparticles with embedded iron oxide nanobeads (NBs) to form monodispersed magneto-thermoresponsive nanocomposites (MTNs). The MTNs are fabricated in a microfluidic system and filled with a drug by means of diffusion. The heat generated by the NBs upon the application of an alternating magnetic field causes the gel-structure to shrink and the release of drug.