Synthesis of Amphipathic YVO4:Eu3+ Nanophosphors by Oleate-Modified Nucleation/Hydrothermal-Growth Process

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• 作者：Takaaki Taniguchi ; Tomoaki Watanabe ; Ken-ichi Katsumata ; Kiyoshi Okada ; Nobuhiro Matsushita
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：March 11, 2010
• 年：2010
• 卷：114
• 期：9
• 页码：3763-3769
• 全文大小：458K
• 年卷期：v.114,no.9(March 11, 2010)
• ISSN：1932-7455

文摘

We have successfully employed an oleate-modified nucleation/hydrothermal growth process for the synthesis of YVO₄:Eu³⁺ nanoparticles. Oleate-passivated YVO₄:Eu³⁺ nanoparticles, formed by precipitation of Y/Eu-oleate complex by Na₃VO₄ solution, were subjected to hydrothermal treatment at 200 °C for 6 h to initiate crystal growth. The resultant nanoparticles (average grain size 16.1 nm) show well-defined red luminescence due to radiative transitions from the ⁵D₀ to ⁷F_J (J: 1−4) levels of Eu³⁺. Significantly, the nanoparticles disperse well in both water and nonpolar solvents, presumably due to an oleate double layer that self-organizes on the nanocrystalline surface. The effects of hydrothermal treatment on the crystal, luminescent, and morphological properties of amphipathic nanoparticles as well as the mechanism of their formation are discussed.