Gas-phase synthesis of Fe-Bi metastable and dumbbell particles

Fe‐Bi nanoparticles were prepared in the gas‐phase by DC magnetron sputtering and in‐fight annealing. The morphological, structural and compositional properties were investigated by High‐resolution transmission electron microscopy, energy dispersive X‐ray spectroscopy and scanning transmission electron microscopy. High‐resolution microscopy studies show that primary particles produced without in‐flight annealing are spherical with a diameter of about 50 nm. Particles sintered at 773 K acquire a dumbbell structure with Fe‐FeO and Bi sections. Fe‐Bi nanoparticles were prepared in the gas‐phase by DC magnetron sputtering and in‐flight annealing. High‐resolution microscopy studies show that primary particles produced without in‐flight annealing are spherical with a diameter of about 50 nm. Particles sintered at 773 K acquire a dumbbell structure with Fe‐FeO and Bi sections.