Generation and manipulation of bubbles and foams stabilised by magnetic nanoparticles

► Particle-stabilised magnetic foams are very stable against strong magnetic forces; particles were resistant to magnetic detachment from bubble surface. ► Manipulation via rotation and translation of bubbles in foams with external magnetic field gradients. ► Calculation of the thickness of particles attached to a bubble using fundamental equations relating all the forces acting at the air-water interface. ► Efficient heating of foams with oscillating magnetic fields.