Mn改性CdSe/CdS制备磁性荧光双功能材料及性能表征  

Preparation and characterization of Fe_3O_4/CA@Mn/CdSe/CdS fluorescent magnetic nanocomposite

作　　者：王凯[1] 王秀玲[1,2] 刘勇健[1,2] 陈勇兵[1] 周翔[1,2] 刘敏[1] 甫亚锋 

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 [2]江苏省环境功能材料重点实验室,苏州215009

出　　处：《化工新型材料》2016年第4期240-242,共3页New Chemical Materials

基　　金：国家自然科学基金项目(51103120)

摘　　要：以共沉淀法制备出表面羟基化的四氧化三铁(Fe_3O_4)磁性颗粒,通过柠檬酸(CA)修饰制备出Fe_3O_4/CA。三步法合成出具有较好荧光性能的CdSe(硒化镉)/CdS(硫化镉)量子点,并经锰(Mn)元素改性,使其具备更好的荧光特性。巯基乙酸(C_2H_4O_2S)为改性后量子点提供连接基团,经乙二胺(C_2H_8N_2)与Fe_3O_4/CA相连接。该材料经荧光分光光度计、荧光显微镜、透射电子显微镜(TEM)和振动样品磁强计(VSM)的表征。结果表明:通过乙二胺的连接(静电吸附及氢键作用),经Mn改性后的CdSe/CdS量子点成功与Fe_3O_4/CA连接,形成了具备磁性荧光双功能的复合材料,饱和磁化强度达到28.86emu/g,其优秀的磁性荧光性能在药物分离、靶向治疗等方面具有很高的应用价值。Then Fe3O4 was modified by citric acid.Three steps to synthesize CdSe/CdS QDs.Mn was used to modify CdSe/CdS for a better fluorescent performance.Through crosslinking agent＇s effect from EDA,Mn/CdSe/CdS QDs were connected to magnetic nanocomposites.The nanocomposites were tested by fluorescence spectrophotometer,Fluorescence Microscope characterization,transmission electron microscopy（TEM）and vibrating sample magnetometer（VSM）.The results showed that through the bridge function of EDA（electrostatic adsorption and hydrogen bonding）,Fe3O4/CA quantum dots were obtained successfully.Magnetic fluorescent composite materials had both magnetic and fluorescent,these particles can be used in drug delivery,targeted therapy and so on.

关 键 词：磁性 荧光 量子点 复合材料 

分 类 号：TB34[一般工业技术—材料科学与工程]