Figure 4. Strategy for capture and release of cargo with stomatocyte magneto-valve.

Schematic representation of the reversible and controlled capture and release of particles via deformation of polymeric stomatocytes from an overall spherical stomatocyte shape with narrow opening into a prolate stomatocyte shape morphology with wide opening, all induced by the magnetic field B at 20 T (routes A and B). The mechanism of capture and release of the particles is purely diffusive and is based on the diffusion of the particles in or out of the structures during the shape transformation under magnetic field. The pink spheres represent the organic solvent molecules required to create a fluidic membrane that is responsive in magnetic field. The blue spheres represent the water molecules used to vitrify the final morphology into quenched structures and the grey spheres represent platinum nanoparticles used for encapsulation.