Synthesis and Magnetic Properties of Hematite Particles in a ‘‘Nanomedusa’’ Morphology
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Among them were two associates of the Department of Condensed Matter Physics.
The surface chemical composition may thus be strongly altered with respect to the bulk one, which affects the number of active sites.
The element with higher affinity to oxygen concentrates on the surface in the oxide form, whereas the element with lower affinity sinks into the subsurface region.
The temperature was then raised to 300 °C and the concentrations of O, Ga, and Ni were measured in the uppermost surface layer 3—5 nm depth as a function of time for 4 h.
All authors read and approved the final manuscript.