Dispersion of Barium Titanate and Strontium Titanate Nanocubes and their Selective Accumulations
Barium titanate (BaTiO3, BT) and strontium titanate (SrTiO3, ST) nanocube particles were prepared by a solvothermal method. The prepared particles were collected by a centrifugal separator. The X-ray diffraction (XRD) measurement and a transmittance electron microscope (TEM) observation confirmed the formation of perovskite BT and ST nanocube particles with sizes of around 17 nm. These nanocube particles were monodistributed in hexane with tri-n-butylphosphine oxide (TBPO) as dispersant, separately, and then, the accumulations composed of the BT and ST nanocubes were built up using a selective catalytic reaction between 3-bromopropylphosphonic acid (BP) and aminomethylphosphonic acid (AM) as smart glue. The TEM observation confirmed that a part of accumulations showed a hetrointerface connection between BT and ST.
Shinobu Fujihara and Tadashi Takenaka
S. Wada et al., "Dispersion of Barium Titanate and Strontium Titanate Nanocubes and their Selective Accumulations", Key Engineering Materials, Vol. 445, pp. 183-186, 2010