Perovskite-type mixed metal oxide materials with general formula of ABO3
, of which barium titanate (BaTiO3
) is the most studied, have received tremendous research attention in the past decades due to their unique ferroelectric, catalytic, sensing, superconducting, and optical properties for use in thin-film capacitors, pyroelectric detectors, electrooptic modulators, transducers, actuators, optical memories, and nonlinear optics. Similar to the trend seen with miniaturization conventional semiconductor devices, it is necessary to control the size and shape of BaTiO3
nanostructures used as building blocks for nanodevices. While various approaches have been explored for the synthesis of BaTiO3
nanocrystals, such as injection-hydrolysis, thermal decomposition, and peptide assisted precipitation, none to date have enable shape control. To overcome this limitation, ISU researchers have developed a one-pot non-hydrolytic approach for shape controlled synthesis of ferroelectric BaTiO3 nanocrystals
. By tuning the molar ratio between the surfactant and metal precursors, BaTiO3
nanocrystals with different shapes, such as nanoparticles, nanorods, and nanowires, can be obtained. These nanocrystals may have utility as nanoscale modules for the assembly of various electronic devices, such as sensors, detectors, capacitors, etc; in addition, BaTiO3
nanocrystals can also be used in multifunctional structural capacitors (where material elements simultaneously carry load and store energy) and related structural sensors.