ITOナノ粒子のソルボサーマル合成と透明導電膜への応用

  • 米谷 紀嗣
    大阪市立大学大学院 工学研究科 化学生物系専攻
  • 藤井 雅也
    大阪市立大学大学院 工学研究科 化学生物系専攻

書誌事項

タイトル別名
  • Solvothermal Synthesis of ITO Nanoparticles and Their Application to the Transparent Conductive Film
  • ITO ナノ リュウシ ノ ソルボサーマル ゴウセイ ト トウメイ ドウデンマク エ ノ オウヨウ

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説明

Indium tin oxide (ITO) nanoparticles have been synthesized from the mixed ethylene glycol solution of indium (III) chloride, tin (II) chloride and sodium hydroxide by the solvothermal process with the addition of oleylamine or oleic acid as a protective reagent. The x-ray diffraction patterns of particles synthesized at 250°C show that the ITO begins to be produced after the reaction duration of 6 h when oleylamine is added to the reaction solution, indicating a promoting effect on the ITO formation, whereas only indium oxyhydroxide is formed when oleic acid is used. The transmission electron microscopic observation has revealed that ITO nanoparticles obtained by the addition of oleylamine are monodisperse and their size increases from 4-5 nm to 50-60 nm with elongating reaction duration from 6 to 96 h. ITO thin films are prepared by the multiple deposition of a collodion membrane incorporating synthesized ITO nanoparticles on the glass substrate followed by sintering at 400-500°C. They exhibit a good transparency in the visible region and a specific resistivity as low as 1.0 Ω·cm.<br>

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