层层自组装法制备碳包覆的Fe_3O_4碳量子点磁性荧光双功能材料  

Preparation of bifuntional magnetic fluorescent composite Fe_3O_4@C@CQD_S by layer-by-layer self-assembly method

作　　者：王胜男 庄虹 刘勇健 Wang Shengnan;Zhuang Hong;Liu Yongjian(School of Chemistry Biology and Material Engineering,Suzhou University of Science and Technology,Suzhou 215009;The Key Laboratory of Environmental Functional Materials of Jiangsu Province, Suzhou 215009)

机构地区：[1]苏州科技大学化学生物与材料工程学院,苏州215009 [2]硅湖职业技术学院,苏州215009

出　　处：《化工新型材料》2018年第4期59-62,共4页New Chemical Materials

基　　金：国家自然科学基金(51103120)

摘　　要：通过化学共沉淀法制备Fe_3O_4磁性纳米颗粒,在其表面包覆碳层,形成Fe_3O_4@C磁性微球,采用层层自组装法将聚二烯丙基二甲基氯化铵(PDDA)修饰到微球表面。将该微球与表面富含羧基的碳量子点(CQDS)连接,得到碳包覆的Fe_3O_4@CQDS(Fe_3O_4@C@CQDS)磁性荧光双功能复合微球。通过X射线衍射(XRD)、振动样品磁强计(VSM)、扫描电子显微镜(SEM)、荧光分光光度计和荧光显微镜等表征手段对该复合微球进行结构表征以及性能测试。结果表明:复合微球粒径约为50nm,饱和磁强度为23.39emu/g,这种性能优异的磁性荧光双功能复合微球有望在生命科学领域得到广泛应用。Fe3O4 magnetic nanoparticles were prepared by chemical coprecipitation method,which were coated by carbon, and Fe3O4@C magnetic microspheres were obtained. Then the microspheres were modified with polydiallyldimethyl （PDDA） by layer-by-layer self-assembly technique. Fe3O4@C@CQDs magnetic fluorescent bifunctional composite microspheres were successfully prepared by connecting the microspheres with the carboxyl-rich carbon spots. The composite microspheres were characterized by X-ray diffraction （XRD）, vibrating sample magnetometer （VSM）, scanning electron microscope （SEM）, fluorescence spectrophotometer, fluorescence microscope and so on. The results showed that the size of microspheres was about 50nm, the saturation magnetic intensity was 23.39emu/g.It was expected that the microspheres will be widely used in life sciences application.

关 键 词：Fe3O4磁性纳米颗粒 层层自组装法 碳量子点 双功能复合微球 

分 类 号：TB34[一般工业技术—材料科学与工程]