文献类型：期刊文献

英文题名：Ionic-liquid-induced microfluidic reaction for water-soluble Ce 1 - XTbxF3 nanocrystal synthesis

作者：Xie, Nan[1]; Luan, Weiling[1]

机构：[1] Key Laboratory of Safety Science of Pressurized System [MOE], School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：22

期号：26

外文期刊名：Nanotechnology

收录：EI(收录号：20112314029137)

语种：英文

外文关键词：Doping (additives) - Nanocrystals - Terbium compounds - Ionic liquids - Solutions - Synthesis (chemical) - Luminescence - Nanoparticles - Photobleaching - Cerium compounds

摘要：Luminescent lanthanide nanocrystals (NCs) are proposed to be a promising new class of fluorescent labeling agents due to their attractive optical and chemical features including low toxicity, wide photoluminescence (PL) emission and high resistance to photobleaching. In this paper, an ionic-liquid-induced synthesis of Ce1 - xTbxF3 nanoparticle was investigated via utilizing a capillary microreactor. Ionic liquid-[bmim]BF 4 acts as both a fluoride source and stabilizing solvent during the reaction, which was shown to be a key factor that governs luminescence intensity of the obtained nanoparticles. The luminescent properties can be greatly improved by optimizing the volume percentage of [bmim]BF4. Furthermore, the reaction temperature exerts an influence on the properties of the prepared samples. Experimental results show that the colloidal solutions of Tb3 +-doped CeF3 NCs exhibit the characteristic emission of Ce3 + 5d-4f and Tb3 + 5D4-7F J (J = 6-3) transitions with 5D4- 7F5 green emission at 542nm as the strongest peak. The as-prepared samples are found dispersible in water with the quantum yield (in aqueous solution) as 12%, which indicates a potential application on biolabels, light-emitting diodes (LEDs) and redox luminescent switches. ? 2011 IOP Publishing Ltd.