Fig. 7. Structure extension design and functional demonstration of MagCaps.

a Schematic diagram of leaf deformation in a dual-module capsule. The magnetic particles’ mass fraction of the magnetic frame in the left module is 50%, and it is 70% in the right module. b Sequential and controllable release processes of drugs A and B in the dual-module capsule. The open magnetic field of the left module is about 15 mT, and that of the right module is about 25 mT. c Magnetic capsule structure with a helical groove and its application for the drug mixing process. d Schematic diagram of mucus-clearing (i) and the comparative absorbance (250–400 nm) of the two capsules after 10 min of rotation in the lining of the small intestine (ii). Source data are provided as a Source Data file. Scale bar: 10 mm.