文献类型：期刊文献

英文题名：Preparation and characterisation of fluorescent polystyrene spheres coated with different sized quantum dots

作者：Chu, M.Q.[1]; Sun, Y.[2]; Liu, G.J.[3]

机构：[1]Tongji Univ, Inst Life Sci & Technol, Shanghai 200092, Peoples R China;[2]Shanghai Jiao Tong Univ, Inst Life Sci & Technol, Shanghai 200032, Peoples R China;[3]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2006

卷号：22

期号：10

起止页码：1240

外文期刊名：MATERIALS SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20064510220647);WOS:【SCI-EXPANDED(收录号:WOS:000241906600016)】；

语种：英文

外文关键词：CdSe; polystyrene spheres; self-assembly; single fluorescence peak; multiple fluorescence peaks

摘要：Water soluble CdSe quantum dots (QDs) coated polymer sphere with single and multiple fluorescent peaks have been prepared through the layer by layer self-assembly method. Polystyrene (PS) spheres ranging mainly from 330 to 750 mu m and from 1(.)0 to 3(.)5 mm were used as the templates for deposition of three sized fluorescent QDs. The results of transmission electron microscopy and fluorescent confocal optical slice showed that the PS/CdSe composites were spherical in shape with core-shell structures. Emission colours of the mixture of spheres with single colour signal emitting at different wavelengths stimulated by a single light source could be distinguished clearly. Single spheres with separated, multiple fluorescence peaks could be easily obtained by controlling the ratios of the three sized CdSe QDs.