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| 聚乙烯亚胺改性水基磁性液体的吸附特性 | |
| 引用本文： | 张伟,沈辉,夏建汉,张秀萍,何喜生.聚乙烯亚胺改性水基磁性液体的吸附特性[J].纳米技术与精密工程,2007,5(2):125-128. |
| 作者姓名： | 张伟 沈辉 夏建汉 张秀萍 何喜生 |
| 作者单位： | 1. 中山大学太阳能系统研究所,广州,510275;广东工业大学物理与光电工程学院,广州,510006 2. 中山大学太阳能系统研究所,广州,510275 3. 广州医学院附属肿瘤医院,广州,510095 |
| 基金项目： | 国家自然科学基金;广东省科技厅科技计划 |
| 摘 要： | 采用两步法制备基因载体聚乙烯亚胺（PEI）改性纳米四氧化三铁（Fe304）磁性液体．样品经傅里叶红外光谱（FIR）、Zeta电位分析、透射电镜（TEM）、热失重分析（TC）和磁化曲线测定等表征．改性水基磁性液体性能稳定．饱和磁化强度可达3.3emu／g.Fe3O4晶粒平均粒径大约为8nm，改性Fe3O4纳米颗粒粒径约为75nm，磁性液体的密度约为1.192g／cm^3．用琼脂糖凝胶电泳方法定性分析了PEI改性水基磁性液体与DNA结合的情况，结果说明这种磁性样品可用作生物医学中基因载体． |
| 关 键 词： | 纳米颗粒 吸附 聚乙烯亚胺 |
| 文章编号： | 1672-6030（2007）02-0125-04 |
| 修稿时间： | 2006-11-09 |
Absorption Properties of Aqueous Ferrofluid Modified by Polyelthylenemine |
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| ZHANG Wei,SHEN Hui,XIA Jian-han,ZHANG Xiu-ping,HE Xi-sheng.Absorption Properties of Aqueous Ferrofluid Modified by Polyelthylenemine[J].Nanotechnology and Precision Engineering,2007,5(2):125-128. | |
| Authors: | ZHANG Wei SHEN Hui XIA Jian-han ZHANG Xiu-ping HE Xi-sheng |
| Affiliation: | 1. Institute for Solar Energy Systems, Sun Yat-Sen University, Guangzhou 510275, China; 2. School of Physics and Optoelectric Engineering, Guangdong University of Technology, Guangzhou 510006 3. Affiliated Tumor Hospital, Guangzhou Medical College, Guangzhou 510095, China |
| Abstract: | A magnetic fluid modified with polyelthylenemine (PEI) was prepared by two-step methods. The samples were characterized by laser light scattering, transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TG-DTA), Zeta potential and vibration magnetometer, respectively. The PEI-modified magnetic liquid is stable and the saturation magnetization is 3.3 emu/g. The average grain size of Fe3O4 is about 8 nm. The nanoparticle size of the PEI-modified magnetic fluid is about 75 nm, and the density is 1.192 g/cm3, respectively. The connection between magnetic fluid and DNA was tested by electrophoresis. The results indicate that the PEI-modified magnetic liquid is a promising candidate as DNA carrier of biomedicine. |
| Keywords: | Fe3O4 DNA |
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