材料科学与工程学报2011，Vol.29Issue(5)：674-678,5.
柠檬酸修饰的磁性Fe_3O_4纳米颗粒制备及其弛豫性能
Preparation of Fe_3O_4 Nanoparticles Coated with Citric Acid and Their Relaxation Properties
摘要
Abstract
Citric acid capped magnetic Fe3O4 nanoparticles were prepared by coprecipitation method.The influence of citric acid on the size of magnetic nanoparticles was investigated by changing the amount of citric acid added.Characterized by transmission electron microscopy（TEM）,Fourier transform infrared spectroscopy（FTIR）,thermo-gravimetric analysis（TGA） and vibrating sample magnetometry（VSM）,it was demonstrated that the size and saturation magnetization of Fe3O4 nanoparticles decreased with the increase of citric acid,which led to an increase of the surface coating of citric acid.Finally,the relaxation properties of Fe3O4 were studied.It was found that both longitudinal relaxation rate and transverse relaxation rate were reduced as the size of nanoparticles decreases which showed that citric acid is an effective modifying small molecule for iron oxide nanoparticles.关键词
Fe3O4/超顺磁性/共沉淀法/磁共振/造影剂/弛豫时间Key words
Fe3O4/superparamagnetism/coprecipitation/magnetic resonance/contrast agent/relaxation time分类
通用工业技术引用本文复制引用
王理莎,古宏展..柠檬酸修饰的磁性Fe_3O_4纳米颗粒制备及其弛豫性能[J].材料科学与工程学报,2011,29(5):674-678,5.基金项目
国家自然科学基金资助项目 （）
