Synthesis and characterization of Mn0.5Zn0.5Fe2O4 and Fe3O4 nanoparticle ferrofluids for thermo-electric conversion

► The synthesis of nanoparticle ferrofluids based on Mn0.5Zn0.5Fe2O4 and Fe3O4 is reported. ► The thermal properties of the ferrofluids creates a novel pump with no moving parts. ► Thermal energy harvesting for conversion into electrical power is demonstrated.