Figure 3From: Synthesis and detection the oxidization of Co cores of Co@SiO2 core-shell nanoparticles by in situ XRD and EXAFS XRD patterns of Co@SiO 2 nanoparticles with temperature (multiplication sign) β-SiO 2 , (black diamond) Co 3 O 4 . (a) Air condition and (b) N2 gas protection condition.Back to article page