Fe-doped BiOBr hollow microspheres were successfully prepared by a simple solvothermal method. The as-prepared samples exhibit excellent photocatalytic activity and electrochemical behaviour, attributed to the unique hollow structure and Fe doping, which is favorable for transfer of photogenerated carriers and enhancement of photoadsorption.

We successfully developed a microneedle patch system integrated with H₂O₂-responsive mesoporous silica nanoparticles for the glucose-monitored transdermal delivery of insulin.