Perovskite hollow cubes: morphological control, three-dimensional twinning and intensely enhanced photoluminescence

Hollow sub-micrometer sized cubes of perovskite CaTiO3 with twinned and textured orthorhombic (pseudocubic) nanodomains in three dimensions are prepared via a facile solvothermal route from calcium nitrate and titanium n-butoxide in poly(ethylene glycol) solvent.