纳米碳包铁磁性颗粒的制备及表征

采用激光感应复合加热蒸发合成法,以CH4为碳源,制备了大量具有壳核结构的纳米碳包铁颗粒,通过透射电子显微镜(TEM)、X射线衍射分析仪(XRD)、能量弥散X射线分析(EDX)等对颗粒进行了表征,并利用动态磁滞回线测定仪测定了纳米颗粒的磁化强度等磁性能.结果表明,利用该方法制备的碳包铁纳米颗粒的平均粒径为25nm,表面碳层厚度为5nm左右,具有铁磁性能.纳米碳包铁颗粒将作为磁性载体在医学细胞分离、细胞染色、靶向用药、定向治疗、肿瘤热疗等方面具有广阔的应用前景.

Preparation and Characterization of Carbon-coated Iron Magnetic Nanoparticles

Carbon-coated iron nanoparticles with a few layers of graphitic shells have been synthesized in a mass scale by laser-induction complex heating evaporation. The samples are characterized by many methods such as transmission electron microscopy (TEM), X-ray diffraction (XRD) experiments, Energy Dispersive X-ray Detector(EDX)and so on. The results suggeste that the average grain-size of the Carbon-coated iron nanoparticles is 25nm and the thickness of the carbon shells is about 5 nanometers. The nanoparticles have ferromagnetic characteristics and acid resistance and their oxidation resistance are enhanced due to the protection of the compact carbon layer. The carbon-coated iron nanoparticles could be excellent nano magnetic carriers to widely be used in all kinds of medical fields.