In situ preparation of magnetic Fe3O4 nanoparticles inside nanoporous poly(l-glutamic acid)/chitosan microcapsules for drug delivery

- Fe3O4 nanoparticles were in situ synthesized inside nanoporous microcapsules.
- Fe3O4 nanoparticles were homogeneously dispersed in the polymer matrix.
- Magnetic microcapsules could be easily manipulated by an external magnetic field.
- The MTX loading capacity depended on loading time and MTX concentration.
- The microcapsules exhibited sustained release behavior.