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One-pot green synthesis of biocompatible arginine-stabilized magnetic nanoparticles

机译：一锅绿色合成生物相容性精氨酸稳定的磁性纳米粒子

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摘要

A green one-step approach has been developed for the synthesis of amino-functionalized magnetite nanoparticles. The synthesis was accomplished by simply mixing FeCl2 with arginine under ambient conditions. It was found that the Fe2+/arginine molar ratio, reaction duration and temperature greatly influence the size, morphology and composition of magnetic nanoparticles. The arginine-stabilized magnetic nanoparticles were characterized by transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy techniques. The results show that the prepared nanoparticles are spherically shaped with a nearly uniform size distribution and pure magnetite phase. The presence of arginine on the magnetic nanoparticle surface has been confirmed and the amount of surface arginine varies with the Fe2+/arginine molar ratio. The surface amine densities are calculated to be 5.60 and 7.84 mu mol mg(-1) for magnetic nanoparticles prepared at 1:1 and 1:2 Fe2+/arginine molar ratio, respectively. The as-synthesized nanoparticles show superparamagnetic behavior at room temperature and good solubility in water. In addition, using a similar synthesis procedure, we have been able to synthesize superparamagnetic manganese and cobalt ferrite nanoparticles.
机译：已开发出一种绿色的一步法来合成氨基官能化磁铁矿纳米粒子。只需在环境条件下将FeCl2与精氨酸混合即可完成合成。发现Fe 2+ /精氨酸的摩尔比，反应持续时间和温度极大地影响磁性纳米颗粒的尺寸，形态和组成。通过透射电子显微镜，x射线衍射，x射线光电子能谱，热重分析和傅里叶变换红外光谱技术对精氨酸稳定的磁性纳米颗粒进行了表征。结果表明，制备的纳米颗粒为球形，具有几乎均匀的尺寸分布和纯磁铁矿相。已经证实在磁性纳米颗粒表面上存在精氨酸，并且表面精氨酸的量随Fe 2+ /精氨酸摩尔比而变化。对于分别以1：1和1：2 Fe2 + /精氨酸摩尔比制备的磁性纳米粒子，表面胺密度经计算分别为5.60和7.84μmol mg（-1）。合成后的纳米颗粒在室温下表现出超顺磁性，并在水中具有良好的溶解性。此外，使用类似的合成程序，我们已经能够合成超顺磁性锰和钴铁氧体纳米粒子。

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