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In Situ Synthesis of Field-responsive Nanocrystalline BaTiO3 Particles Modified with Functional Organics

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Abstract

Nanocrystalline BaTiO3 particles modified with polarizable ligands were synthesized through hydrolysis of modified metal–organics below 100°C. BaTiO3 precursor was synthesized from barium metal, titanium isopropoxide and polarizable ligands in a mixture of ethanol and 2-ethoxyethanol. The modified Ba–Ti complex alkoxide was hydrolyzed yielding BaTiO3 particles modified with organics. The crystallinty of nanometer-sized particles was dependent upon the hydrolysis conditions, and increased with increasing water amount and time. The nanocrystalline particles were identified to be BaTiO3 by X-ray diffraction (XRD) and electron diffraction. A fluid consisting of modified BaTiO3 particles and silicone oil revealed a typical electrorheological (ER) behavior on applying DC field. The ER behavior was found to depend upon the kind of ligand. 4-Fluorobenzyloxy modifier revealed the highest yield stress in the ER measurement among 4-substitued benzyloxy ligands examined.

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Authors and Affiliations

  1. Nanomaterials Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan

    Toshinobu Yogo & Wataru Sakamoto

  2. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku Nagoya, 464-8603, Japan

    Reimon Fukuzawa & Shin-ichi Hirano

Authors
  1. Toshinobu Yogo
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  2. Reimon Fukuzawa
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  3. Wataru Sakamoto
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  4. Shin-ichi Hirano
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Correspondence to Toshinobu Yogo.

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Yogo, T., Fukuzawa, R., Sakamoto, W. et al. In Situ Synthesis of Field-responsive Nanocrystalline BaTiO3 Particles Modified with Functional Organics. J Nanopart Res 7, 633–640 (2005). https://doi.org/10.1007/s11051-005-3474-0

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  • DOI: https://doi.org/10.1007/s11051-005-3474-0

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