项目名称: 水溶性稀土上转换发光纳米材料的尺寸和形貌控制及在免疫层析中的应用
项目编号: No.51272022
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 一般工业技术
项目作者: 赵谡玲
作者单位: 北京交通大学
项目金额: 85万元
中文摘要: 纳米上转换发光材料与免疫层析技术的融合,是实现高敏感检测的重要途径。而现有上转换荧光免疫层析中颗粒尺寸、发光效率及层析效果三者之间的悖论,却限制了敏感性的进一步提升。本课题目标是合成高发光效率、水溶性的纳米上转换发光材料,控制材料的尺寸和形貌,用所制备的上转换发光颗粒取代现有上转换荧光免疫层析中通常使用的亚微米级上转换荧光颗粒。首次用S-G方法一步合成稀土离子掺杂的LaF3/SiO2核壳结构的纳米上转换发光材料,摸索合成条件,控制其颗粒尺寸小于100nm;用热分解方法制备NaYF4纳米材料,通过在基质中引入La或Gd离子,改善NaYF4基质材料的形貌,得到尺寸小于50nm的上转换发光材料,通过不同稀土离子的掺杂,实现高效的红、绿、蓝上转换发光;深入研究上转换发光强度随材料粒径及其它因素变化的机制,将不同粒径、不同形貌的上转换发光颗粒制备成层析试纸,并通过层析效果进一步指导材料的制备。
中文关键词: 免疫层析;上转换;掺杂;表面修饰;
英文摘要: The upconversion immunochromatography in which upconversion luminescence materials are used as biomarkers is the way to realize a new detection technique with the high sensitivity. A paradox between the upconversion luminescence materials and the result of immunochromatography is that the smaller the particle size is, the lower the upconversion luminescence efficiency is, but the higher the sensitivity is. This paradox limits to improve the sensitivity of the upconversion immunochromatography. In our study, we should synthesize high efficient upconversion luminescence nano materials and study their luminescent properties. The goal of our project is to use our synthesized materials to substitute the submicron materials used in present upconversion immunochromatography. Firstly, the water dispersible core/shell LaF3/SiO2 upconversion luminescence materials are synthesized by sol-gel method. The particle size should be smaller than 100nm by controlling the synthesis conditions. Then rare earth ions doped NaYF4 are synthesized by thermal decomposition method with the particle size smaller than 50nm, The element La or Gd will be introduced in the host material NaYF4 to improve the phase transformation. The red, green and blue color upconversion luminescence materials should be synthesized respectively by doped differ
英文关键词: immunochromatography;upconvesion;codoping;modification;