摘要
在水相中,采用化学共沉淀法以FeCl_3·6H_2O和FeSO_4·7H_2O为原料合成超顺磁性Fe_3O_4纳米粒子,将磁性纳米粒子加入到正硅酸乙酯(TEOS)的醇水体系中,使磁性纳米粒子表面生成一层无定型SiO_2包覆层,再以3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPTS)对其进行修饰,使磁性纳米粒子表面接入丰富的功能双键,与巯基乙酸、乙二胺修饰后的CdSe/CdS量子点连接,得到磁性荧光双功能纳米微球,并对其进行结构表征和性能测试。结果表明,合成的磁性纳米粒子粒径约为40nm,荧光强度约为450a.u.,饱和磁化强度为32.2emu/g。这种合成简便的磁性荧光双功能纳米材料有望在靶向治疗、免疫检测、细胞的分离和催化等领域得到广泛应用。
Superparamagnetic nano Fe_3O_4 were prepared by hydrothermal coprecipitation of ferric and ferrous ions in the aqueous phase.The magnetic nanoparticles were added into TEOS in alcohol-water system,coating the magnetic nanoparticles with amorphous silica for formed shells.Rich of functional double bonds were contained to the magnetic nanoparticles by modifing with MPTS.The surface-modified Fe_3O_4 nanoparticles were then linked to CdSe/CdS quantum dots（QDS）,which were modified with mercaptoacetic acid and ethylenediamine.The Fe_3O_4/CdSe/CdS magnetic fluorescent nanocomposites were synthesized in this way.The structure and performance of nanocomposites were characterized by TEM,VSM and EDS.The results showed that：the as-prepared composites had a typical diameter of 40 nm,and saturation magnetic susceptibility was 32.2emu/g.The particles could have great potential applications in targeted therapy,immunoassay,cell separation and catalysis and so on.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第3期64-66,69,共4页
New Chemical Materials
基金
国家自然科学基金资助项目(51103120)
苏州科技学院研究生创新(2011)资助项目(SKCX12S_048)
关键词
磁性
荧光
二氧化硅
纳米粒子
magnetism
fluorescence
silica
nanoparticle
作者简介
甫亚锋（1991-），男，硕士研究生，研究方向：磁性荧光纳米材料的合成与应用。
