“…As the size of the particles decreases, the magnetic properties of the iron(III) oxides exhibit peculiar properties, which differ from those of bulk counterpart materials, because of nanoscale confinement and surface effects. They have a range of practical applications in different technological areas, such as solar cell, pigment, microwave absorption, catalysis, environ-ment protection, gas sensor, magnetic storage, clinical diagnosis and treatment, etc [31][32][33][34][35][36][37][38][39][40].…”