| 憎水性三金属纳米粒子的合成、表征及磁性 |
| |
| 引用本文： | 戴兢陶,王新红,孙玉凤,沈明.憎水性三金属纳米粒子的合成、表征及磁性[J].影像科学与光化学,2010,28(3):173-181. |
| |
| 作者姓名： | 戴兢陶 王新红 孙玉凤 沈明 |
| |
| 作者单位： | 1. 盐城师范学院, 江苏省滩涂生物资源与环境保护重点建设实验室, 江苏, 盐城, 224051;2. 盐城师范学院, 化学化工学院, 江苏, 盐城, 224051;3. 扬州大学, 化学化工学院, 江苏, 扬州, 225002 |
| |
| 基金项目： | 江苏省高校自然科学基础研究项目，江苏省滩涂生物资源与环境保护重点建设实验室项目资助 |
| |
| 摘 要： | 以磺基琥珀酸二辛酯钠盐(AOT)为表面活性剂,采用反胶束法合成了憎水性CoFe/Au纳米粒子, 利用配体交换、水洗等去除AOT并使纳米粒子分级.采用紫外-可见光谱(UV-Vis)、透射电镜(TEM)、X射线衍射(XRD)、X射线电子能量散射(EDX)及等离子发射光谱 (ICP)等对产物进行了表征,通过超导量子干涉仪(SQIUD)研究了纳米粒子的磁性质.结果表明,反胶束法合成的CoFe/Au三金属纳米粒子具有较好的单分散性和稳定性,平均粒径约为4 nm.当外磁场强度为1.5×104 A/m时,阻塞温度Tb为65 K,温度高于Tb时纳米粒子显示出超顺磁性,低于Tb时呈铁磁性,在5 K时其矫顽力(Hc)达4.67×104 A/m.
|
| 关 键 词： | 反胶束 配体交换 CoFe/Au纳米粒子 磁性质 |
| 收稿时间： | 2010-01-06 |
Synthesis, Characterization and Magnetic Properties of Hydrophobic Trimetal Nanoparticles |
| |
| DAI Jing-tao,WANG Xin-hong,SUN Yu-feng,SHEN Ming.Synthesis, Characterization and Magnetic Properties of Hydrophobic Trimetal Nanoparticles[J].Imaging Science and Photochemistry,2010,28(3):173-181. |
| |
| Authors: | DAI Jing-tao WANG Xin-hong SUN Yu-feng SHEN Ming |
| |
| Institution: | 1. Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers College, Yancheng 224051, Jiangsu, P. R. China;2. School of Chemistryand Chemical Engineering, Yancheng Teachers College, Yancheng 224051, Jiangsu, P. R. China;3. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, P. R. China |
| |
| Abstract: | CoFe/Au nanoparticles were prepared by reverse micelle method in the n-hexane solution of sodium bis(2-ethylhexyl)sulfosuccinate (AOT).The CoFe/Au nanoparticles of different size were separated after ligand exchange was fulfilled and AOT was removed by washing of water.The nanoparticles were characterized by ultraviolet visible spectroscopy(UV-Vis),transmission electron microscopy(TEM),X-ray diffraction(XRD),energy dispersive X-ray absorption(EDX) and plasma-atomic emission spectrometry(ICP),respectively.The magnetic properties of CoFe/Au nanoparticles were measured on Superconducting quantum interference device(SQUID).The results indicated that the size of nanoparticles was ca.4 nm and the nanoparticles had very good stability and monodispersity.When a 1.59×104 A/m field was applied,the blocking temperature of CoFe/Au nanoparticles Tb was 65 K.The particles were superparamagnetic above Tb,while the particles were ferromagnetic below Tb with Hc (4.67×104 A/m) at 5 K. |
| |
| Keywords: | reverse micelles ligand exchange CoFe/Au nanoparticles magnetic properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《影像科学与光化学》浏览原始摘要信息 |
| 点击此处可从《影像科学与光化学》下载免费的PDF全文 |
|
