双功能磁性荧光纳米复合Fe_3O_4/PMIDA@CdSe/CdS微粒的制备与表征  

Preparation and characterization of bifunctional magnetic and luminescent nanomicrospheres Fe_3O_4/PMIDA@CdSe/CdS

作　　者：陈勇兵[1] 王秀玲[1] 刘勇健[1] 刘敏[1] 甫亚锋 周翔[1] 

机构地区：[1]苏州科技学院化学生物与材料工程学院,苏州215009

出　　处：《化工新型材料》2016年第1期127-129,133,共4页New Chemical Materials

基　　金：国家自然科学基金(51103120);苏州科技学院研究生创新(2011)资助项目(SKCX12S-048)

摘　　要：以FeCl_3·6H_2O和FeSO_4·7H_2O为原料,制得磁性Fe_3O_4纳米颗粒。利用静电吸引合成了双甘膦包裹的Fe_3O_4/双甘膦(PMIDA),使磁性微球表面连上大量的功能基团羧基,再与乙二胺通过键合使磁性微球外面修饰着氨基。将修饰过巯基乙酸的量子点CdSe/CdS与磁性微粒混合,量子点表面的羧基与Fe_3O_4表面的氨基进行连接。对其进行荧光分光光度计,透射电子显微镜(TEM)、振动样品磁强计(VSM)和荧光显微镜等表征,结果表明:复合后的微球具备很好的发光性能和优越的磁性能。Fe3O4 magnetic nanoparticles were prepared with FeCl36H2O and Fe3O47H2O.Fe3O4/PMIDA was synthesized by electrostatic attraction.The surface of magnetic microspheres contained a large number of carboxyl groups.Through ethylene diamine bonded with magnetic microspheres,so that the outside of magnetic microspheres were modified with amino group.The thioglycolic acid modified quantum dots CdSe/CdS was mixed with Fe3O4.CdSe/CdS,then amino groups of Fe3O4 were connected to carboxyl groups.The nanocomposites were tested by spectrophotometer,transmission electron tmicroscopy（TEM）,vibrating sample magnetometer（VSM）,fluorescence microscopy and so on.The results showed that the microspheres had good luminescent properties and superior magnetic properties.

关 键 词：荧光 磁性 双甘膦 四氧化三铁 纳米复合微球 

分 类 号：TB383.1[一般工业技术—材料科学与工程]