|About this Abstract
||Materials Science & Technology 2011
||Solution-Based Processing for Ceramic Materials
||Bottom-Up Evolution of BaTiO3 and SrTiO3 Nanocubes in Ordering Structure
||Ken-ichi Mimura, Feng Dang, Kazumi Kato, Hiroaki Imai, Satoshi Wada, Hajime Haneda, Makoto Kuwabara
|On-Site Speaker (Planned)
The ordering structures of BaTiO3 (BT) single crystal nanocubes, SrTiO3 (ST) single crystal nanocubes, and their mixture were directly fabricated on substrates such as Si and Pt-coated Si by capillary force assisted self-assembly method. Since the nanocubes had been synthesized using oleic acid, a quite amount of the surfactant remained at the surfaces and may affect the behaviors of nanocubes on the substrates as well as in suspension. The multilayer and monolayer ordering structures consisting of the nanocubes in size of 15-20 nm were confirmed by SEM and SPM. The atomic mapping investigated by HR-TEM and EDX, indicated that BT and ST nanocubes coexisted homogeneously in the structure and had possibility to be arranged in order to each other. By PFM measurements, the mixture exhibited characteristic non-linear behaviors, which is distinguished from BT and ST nanocubes. The hetero-interface between BT and ST nanocubes would introduce the anomaly in piezoelectric properties.