Preparation of Gd2O3:Yb,Er and Gd2O2S:Yb,Er infrared-to-visible conversion phosphor ultrafine particles using an emulsion liquid membrane system
Preparation of Gd2O3:Yb,Er and Gd2O2S:Yb,Er infrared-to-visible conversion phosphor ultrafine particles using an emulsion liquid membrane system
复制标题
DOI：
10.1016/j.jcis.2003.08.026
复制
发表时间：
2004-01-01
影响因子：
9.9
通讯作者：
Orikoshi, T
中科院分区：
文献类型：
--
作者：
Hirai, T;Orikoshi, T
采用乳状液膜（ELM，油包水（W/O/W）乳化体系）制备了上转化荧光粉微粒（Gd2O3:Yb，Er和Gd2O2S:Yb，Er）。在ELM体系中得到的Gd-Yb-Er草酸盐复合颗粒主要为20 ~ 60 nm，还有少量亚微米级的球形颗粒。将ELM体系制备的草酸盐前驱体颗粒在空气和硫气氛中煅烧，分别得到了纳米级的Gd2O3:Yb，Er和Gd2O2S:Yb，Er颗粒。在红外激发下（λ (ex) = 980 nm），用双光子工艺制备的Gd2O3:Yb，Er和Gd2O2S:Yb，Er粒子获得了上转换发光（红色和绿色）。上转换荧光粉细颗粒，直径约50 nm，可应用于发光报告材料，用于免疫测定或DNA测定中检测目标分析物。(C) 2003 Elsevier Inc.版权所有。
Upconverting phosphor fine particles (Gd2O3:Yb,Er and Gd2O2S:Yb,Er) have been prepared, using an emulsion liquid membrane (ELM, water-in-oil-in-water (W/O/W) emulsion) system. The composite Gd-Yb-Er oxalate particles obtained in the ELM system were mainly 20-60 nm in size, together with a smaller amount of submicrometer-sized spherical particles. Nanometer-sized Gd2O3:Yb,Er and Gd2O2S:Yb,Er particles were obtained by calcination in air and in sulfur atmosphere, respectively, of the precursor oxalate particles prepared in the ELM system. Upconversion emissions (red and green) were obtained from the Gd2O3:Yb,Er and Gd2O2S:Yb,Er particles prepared in the ELM system under infrared excitation (lambda(ex) = 980 nm) via a two-photon process. Upconversion phosphor fine particles, about 50 nm in diameter, may be applied to the luminescent reporter material for the detection of the targeted analyte in immunoassays or DNA assays. (C) 2003 Elsevier Inc. All rights reserved.