Synthesis of single-crystal barium titanate nanorods transformed from potassium titanate nanostructures

Abstract

Single-crystal barium titanate (BaTiO 3) nanorods were synthesized by a hydrothermal reaction using precursors of potassium titanate (K 2O· nTiO 2, n = 4 or 6) nanostructures. The precursors of potassium tetratitanate (K 2Ti 4O 9) and potassium hexatitanate (K 2Ti 6O 13) nanostructures were prepared by a sol–gel method in which a growth of K 2O· nTiO 2 ( n = 4 or 6) nanorods was induced by a role of pre-crystallized K 2O phase at defined heating temperatures. The specific morphologies of BaTiO 3 nanorods featured with flat or stepped surfaces and rectangular or polygonal cross-section, were obtainable by selecting the structure of precursors.