化学学报 ›› 2010, Vol. 68 ›› Issue (19): 1965-1970. 上一篇    下一篇

尹东光*,张礼,刘斌虎,谢春娟,张乐,胡艳   

  • 投稿日期:2010-04-19 修回日期:2010-05-24 发布日期:2010-06-22

Preparation and Characterization of A Novel Type of Dual- Lanthanide-Complexs Doped Ag@Silica Fluorescent Nanoparticles

YIN Dong-Guang, ZHANG Li, LIU Bin-Hu, XIE Chun-Juan, ZHANG Le, HU Yan   

  1. (College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444)
  • Received:2010-04-19 Revised:2010-05-24 Published:2010-06-22
  • Contact: dongguang yin E-mail:dongguang_yin@yahoo.com

关键词: 对氨基苯甲酸-二乙烯三胺五乙酸-3-氨丙基三甲氧基硅烷, Eu3+, Tb3+, Ag@SiO2纳米粒子, 金属增强荧光

A novel type of dual-lanthanide-complexs doped Ag@silica fluorescent nanoparticles with amino functionalized has been developed by a facil water-in-oil (W/O) microemulsion method. The structural and optical properties of the nanoparticles were characterized by transmission electron microscopy (TEM), fluorescence spectra and UV-Vis spectra, respectively. The results show that the fabricated nanoparticles are spherical, core-shell structure, highly fluorescent and highly photostable. Measurements of the luminescent emissions from the Ag@SiO2 nanoparticles, in comparison with control silica nanoparticles without silver cores, showed that the presence of the silver cores can increase the fluorescence intensity approximately 3-fold. This enhancement offers a potential increase in detection sensitivity with increased photostability. The nanoparticles are expected to be utilized in super-sensitive bioassays systems such as time-resolved fluorescence immunoassay, biosensor and biochip.

Key words: Eu3+/Tb3+-PABA-DTPA-APTMS, Eu3+, Tb3+, Ag@SiO2 nanoparticles, metal enhancing fluorescence