Synthesis of γ-Fe_2O_3/SiO_2/Au magnetic composites for immobilization of bovine serum albumin

查看全文 作　　者：LI [1]ZhiXia;PENG [1]MingLi;JIN [1]YanYan;WANG [1]XiaoFang;CUI [2]YaLi;CHEN [2]Chao

机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China;[2]National Engineering Research Center for Miniaturized Detection Systems, Northwest University, Xi'an 710069, China

出　　处：《Chinese Science Bulletin》索引2011年第56卷第27期,共5页

基　　金：supported by the Research Program of the Education Department of Shaanxi Province (09JK765) 摘　　要：A method for the two-step synthesis of magnetic composites with a γ-Fe 2 O 3 core, silica inner layer and numerous gold nanoparticles supported on the surface of the silica (γ-Fe 2 O 3 /SiO 2 /Au) is described. First, thiol-functionalized γ-Fe 2 O 3 /SiO 2 composites and gold colloids are prepared by modifying γ-Fe 2 O 3 /SiO 2 composites with mercaptosilane and reduction of Au 3+ to Au 0 with citrate, respectively. Gold nanoparticles are then assembled on the surface of the thiol-functionalized γ-Fe 2 O 3 /SiO 2 composites to form γ-Fe 2 O 3 /SiO 2 /Au composites. The structure of the composite particles is confirmed by transmission electronic microscopy and powder X-ray diffraction. Immobilization studies with bovine serum albumin (BSA) demonstrate that the γ-Fe 2 O 3 /SiO 2 /Au composites can be used to immobilize BSA, making them useful for biomedical and biological applications. 关键词：磁性复合材料牛血清白蛋白合成方法透射电子显微镜金纳米粒子二氧化硅生物医学 SIO

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Synthesis of γ-Fe_2O_3/SiO_2/Au magnetic composites for immobilization of bovine serum albumin

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