Hydrothermal synthesis of single-crystalline tetragonal perovskite PbTiO3 nanosheets with dominant (001) or (111) facets

摘要

Single-crystalline tetragonal perovskite PbTiO3 nanosheets are synthesized via a hydrothermal route assisted by NaNO3 and KNO3. Due to the difference in electronegativity, Na+ ions fasten on (001) planes, whereas K+ ions fasten on (111) planes, resulting in PbTiO3 nanosheets with dominant (001) or (111) facets, respectively.