Fig. 2: Synthesis and ex situ characterizations of pure-phase BSCF and hybrid BSCF.

a In situ chemical synthesis of hybrid BSCF material with host phase BSCF, hexagonal-phase BaCl2 and cubic-phase SrCl2. b XRD patterns and refinements. HRTEM images of c pure-phase BSCF and d hybrid BSCF (scale bar is 2 nm). e–g EDX spectroscopy line-scan profiles (scale bar is 50 nm).