材料科学
纳米颗粒
纳米
钛酸钡
透射电子显微镜
电介质
Zeta电位
化学工程
色散(光学)
纳米技术
折射率
分析化学(期刊)
光电子学
化学
有机化学
光学
复合材料
工程类
物理
作者
Yukika Yamada,Masaki Matsubara,Atsushi Muramatsu,Shin'ichi Takeda,Kiyoshi Kanie
标识
DOI:10.1016/j.apt.2022.103660
摘要
Single-crystalline barium titanate: BaTiO3 (BT) nanoparticles (NPs) with sub-10-nm size have been successfully obtained by a highly concentrated solvothermal synthesis using a high concentration of Ba(OH)2 and a titanium complex. To obtain sub-10-nm NPs, we focused on the gradual increase in the OH– ion concentration and the decrease in the dielectric constant of solvents, and BT NPs were produced in 1 h even at a low temperature of 200 °C. High-resolution transmission electron microscopy (HR-TEM) observation revealed that the resulting BT NPs were single-nanometer size, consisting of a single-crystalline structure. 1H-nuclear magnetic resonance (NMR) relaxation time (T2) and zeta potential measurements demonstrated that our BT NPs had high dispersibility and dispersion stability under acidic conditions. The yellowness index measurements revealed that the BT NPs dispersions exhibited colorless property. The resulting single nanometer-sized BT NPs are promising as high refractive index materials for optical applications due to being dispersed in optical resins.
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