Preparation and characterization of biocompatible magnetic carbon nanotubes
Preparation and characterization of biocompatible magnetic carbon nanotubes
复制标题
生物相容性磁性碳纳米管的制备及表征
DOI：
10.1016/j.apsusc.2010.06.078
复制
发表时间：
2010-11-01
影响因子：
6.7
通讯作者：
Gao, Lian
中科院分区：
文献类型：
--
作者：
Shan, Yan;Chen, Kezheng;Gao, Lian
在氮气保护下，Fe(Acac)(3)、FeCl3或Fe(CO)(5)在含酸处理的2-吡咯烷酮中于240℃下原位热分解，成功地制备了由多壁碳纳米管(MWNTs)核和Fe3O4壳组成的磁性碳纳米管。用透射电子显微镜、X射线衍射仪、扫描电子能谱仪、X射线光电子能谱和超导量子干涉仪对样品进行了表征。并与裸碳纳米管的生物相容性进行了比较。结果表明，包覆Fe3O4纳米粒子后得到的磁性碳纳米管在室温下表现出超顺磁性，其封闭温度约为80K。纳米管的磁性能与磁性颗粒的含量有关，磁性纳米颗粒含量越高，封闭温度越高，饱和磁化强度越高。对细菌细胞(大肠杆菌)的抑菌活性结果表明，多壁碳纳米管具有抗菌活性，而磁性纳米管在比多壁碳纳米管浓度更高的情况下仍具有生物相容性。(C)2010爱思唯尔B.V.保留所有权利。
Magnetic carbon nanotubes consisting of multi-wall carbon nanotubes (MWNTs) core and Fe3O4 shell were successfully prepared by in situ thermal decomposition of Fe(acac)(3) or FeCl3 or Fe(CO)(5) in 2-pyrrolidone containing acid treated MWNTs at 240 degrees C with the protection of nitrogen gas. The samples were characterized by TEM, XRD, SEAD, XPS and superconducting quantum interference device. Also, their biocompatibility was compared with naked carbon nanotubes. The results showed that after coated with Fe3O4 nanoparticles, the obtained magnetic carbon nanotubes show superparamagnetic characteristic at room temperature, and their blocking temperature is about 80 K. The magnetic properties of the nanotubes are relevant to the content of magnetic particles, increasing content of magnetic nanoparticles leads to higher blocking temperature and saturation magnetization. The results of antimicrobial activities to bacterial cells (Escherichia coli) showed that the MWNTs have antimicrobial activity, while the magnetic nanotubes are biocompatible even with a higher concentration than that of MWNTs. (C) 2010 Elsevier B.V. All rights reserved.