Growth of monodispersed SrTiO3 nanocubes by thermohydrolysis method

Piezoresponse properties of orderly assemblies of BaTiO3 and SrTiO3 nanocube single crystals

“…By dynamic light scattering (DLS) measurements of ST and BT nanocubes in toluene, the average size of ST and BT nanocubes was determined to be 20 nm and BT nanocubes showed a narrow size distribution corresponding to be almost mono-dispersed in toluene. 14,15 On the other hand, ST nanocubes had rather wide band in the range of 50-70 nm in the DLS profile. 14 This result indicated that ST nanocubes were slightly aggregated in toluene.…”

“…Recently, BT and ST nanocube single crystals which grew with {100} crystalline faces were synthesized by using hydrothermal process. [12][13][14][15] The orderly assembled structure of these nanocubes has a large potential to introduce innumerable identical BT/ST hetero-interfaces. Additionally, by the solution bottom-up process using a capillary force at the evaporation of dispersion media, monolayers of the nanocubes were settled on Pt electrodes.…”

“…14,15 The microstructure of these dielectric nanocubes have been observed by a high resolution transmission electron microscope (HR-TEM). The high magnification profiles indicated that each had a cubic shape with sharp edges and clear lattice fringes without inner voids.…”

Synthesis of BaZrO₃ nanocrystals by wet chemical reaction

“…There are many techniques, such as the hydrothermal method, the solvothermal method, and the sol-gel method [4][5][6][7][8][9][10]. In particular, the composite-hydroxide-mediated (CHM) approach is a unique technique that uses the strong base of anhydrous hydroxides [11][12][13][14][15][16].…”

Innovative nanocrystal-based technologies for ceramic devices with novel electronic functions

“…Examples of monodisperse BaTiO 3 and SrTiO 3 NCs with well-developed cube-like shapes are shown in Fig. 3; the BaTiO 3 nanocubes were synthesized by a soft solution chemical process using Ba(NO 3 ) 2 , Ti(OBu) 4 , BuOH and oleic acid at 135 ℃ under a strong NaOH basic condition [21], while the SrTiO 3 nanocubes were prepared from an aqueous solution containing Sr(OH) 2 , bis(ammonium lactate) titanium dihydroxide (TALH), hydrazine and oleic acid using a hydrothermal process at 200 ℃ under a strong NaOH basic condition [22]; the latter was modified from that proposed by Koumoto group [23]. It can be presumed that organic molecules used in the solvothermal/hydrothermal processes, which act as ligand and/or surfactant molecules, play important roles in the formation of cubic NCs in these cases, but the forming mechanisms of these NC cubes have not been satisfactorily clarified yet.…”