The aim of my research is the study of ‘osmotic’ motors sensitive to external magnetic fields using Brownian/Stokesian dynamics simulations. Reaction-driven propulsion of colloidal particles consists of the localized generation of a concentration gradient by an on-board surface chemical reaction. As shown in recent experiments, the directed motion of these particles is hindered by their rotary Brownian motion and thus preventing its potential to be completely realized. However, if the self-propelled particle is magnetized, its directionality can be controlled externally by a magnetic field and the conversion from chemical energy into motion becomes more effective.