Figure 1

(a) XRD pattern, (b) (110) plane of XRD pattern, and (c) cell parameters of as-synthesized BSTO NPs, in comparison with JCPDS card values. SEM images of BSTO NPs prepared with different stoichiometries: (d) BaTiO₃, (e) Ba_0.8Sr_0.2TiO₃, (f) Ba_0.6Sr_0.4TiO₃, (g) Ba_0.4Sr_0.6TiO₃, (h) Ba_0.2Sr_0.8TiO₃, and (i) SrTiO₃.