Laser-assisted nanofabrication of multielement complex oxide core–shell nanoparticles

•Synthesis of Cr2O3-Fe2O3 core-shell nanoparticles by nanosecond pulsed laser-induced dewetting of alloyed thin films.•The contact angle and shell thickness of nanoparticles remain almost consistent regardless of the nanoparticle size.•Core-shell formation is governed by the differences in cooling rate, surface energy, and mixing enthalpy of Cr2O3 and Fe2O3.