Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 9, Pages 1343-1347Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.200901230
Keywords
Barium; Nanostructures; Perovskite phases; Template synthesis; Titanates; Solvent effects
Categories
Funding
- Ministry of Commerce, Industry and Energy (MOCIE), Republic of Korea
- National Research Foundation of Korea (NRF), Korea government (MEST) [2009-0082544]
- National Research Foundation of Korea [2009-0082544] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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One-dimensional (1D) barium titanate (BaTiO3) nanowires, which were uniformly covered with 0D BaTiO3 nanocrystals, were synthesized by using a simple solvothermal reaction of protonated trititanate (H2Ti3O7) nanowires with barium hydroxide octahydrate [Ba(OH)(2)center dot 8H(2)O] at 80 degrees C in ethanol/water mixed solvent systems. The compositions of the mixed solvents - the volume ratio of ethanol to deionized water was a key controlling parameter in order to determine the phase formation and primary particle size of the 0D BaTiO3 nanocrystals. Single-phase cubic perovskite BaTiO3 started to form at 80 degrees C in a mixed solvent containing more than approximately 60 % by volume of ethanol. Field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) analysis revealed that the as-prepared BaTiO3 retained its wire-shaped morphology with nanocrystals on the surface. Furthermore, the synthetic mechanism of the 0D-1D BaTiO3 nanostructures was demonstrated in view of the dielectric tuning of the mixed solvent and the similarities between the crystal structures of BaTiO3 and H2Ti3O7.
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