fig1

Figure 1. (A) Schematic diagram of the 3D-LaMnO₃ prepared by “top-down” method and (B) XRD patterns of LMO-S, LMO-E and La₃Mn₂O₇. The blue spheres in (A) denote LaMnO₃. 3D: Three-dimensional; XRD: X-ray diffraction; LMO-S: LaMnO₃ prepared by the sol-gel method; LMO-E: LaMnO₃ prepared by the “top down” method.