Figure 5From: Synthesis, characterization, and magnetic properties of monodisperse CeO2 nanospheres prepared by PVP-assisted hydrothermal methodHRTEM images of CeO 2 nanospheres prepared at 200°C for 24 h. (a) As-prepared CeO2 nanospheres and (b) CeO2 nanospheres after annealing in Ar at 400°C for 2 h.Back to article page