One-step synthesis of BaTiO3/CaTiO3 core-shell nanocubes by hydrothermal reaction

Novel cube-shaped nanocrystals of BaTiO3 (BT) surrounded by CaTiO3 (CT) that can be used for piezo-driven energy harvesters were synthesized using a one-step hydrothermal reaction with surfactant and additives at 250 degrees C for 24 h. The size distribution of the nanocubes (NCs) was narrow, with an approximate average size of 50 similar to 60 nm. The nanocubes had a core-shell configuration, such that the Pbnm structured CT shell was grown on a P4mm structured BT core by sharing corresponding [001] directions. STEM-EDX and EELS indicated that Ba ions did not diffuse into the CT shell region. Piezoelectric hysteresis loops of BT/CT NCs were obtained by piezoresponse force microscopy.

Automated summary

Novel cube-shaped nanocrystals of BaTiO3 (BT) surrounded by CaTiO3 (CT) were synthesized for piezo-driven energy harvesters using a one-step hydrothermal reaction. The nanocubes had a core-shell configuration with stable size distribution and excellent piezoelectric properties.