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首页> 外文期刊>CERAMICS INTERNATIONAL >Superparamagnetic iron oxide nanoparticles (SPIONs): Green preparation, characterization and their cytotoxicity effects
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Superparamagnetic iron oxide nanoparticles (SPIONs): Green preparation, characterization and their cytotoxicity effects

机译：超顺磁性氧化铁纳米粒子（SPIONs）：绿色制备，表征及其细胞毒性作用

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摘要

Superparamagnetic iron oxide nanoparticles (SPIONs; Fe_3O_4) were prepared by the covalent binding of starch onto the surface of magnetic Fe_3O_4 nanoparticles, by a "green" co-precipitation method. The scanning electron microscopy (SEM) illustrated the regular spheres of Fe_3O_4 particles that were coated by starch molecules to be regular spheres with a mean diameter of about 40 nm. Powder X-ray diffraction patterns (PXRD) indicated that the prepared samples were pure Fe_3O_4 with a spinel structure while the coating of starch did not result in a phase change. The starch coating onto the Fe_3O_4 nanoparticles was also demonstrated by Fourier transform infrared (FTIR) spectra. Magnetic measurements revealed that the saturated magnetization of the starch-SPIONs reached 42.1 emu/g, having nanoparticles with the characteristics of superparamagnetism, while a dose dependent toxicity with non-toxic effect of concentration below 62.5 μg/mL was observed in the studies of in vitro cytotoxicity on neuro2A cells.
机译：通过“共生”绿色共沉淀法将淀粉共价结合到磁性Fe_3O_4纳米颗粒的表面上，制备了超顺磁性氧化铁纳米颗粒（SPIONs; Fe_3O_4）。扫描电子显微镜（SEM）显示了被淀粉分子包覆的Fe_3O_4颗粒的规则球为平均直径约为40 nm的规则球。粉末X射线衍射图谱（PXRD）表明，所制备的样品为具有尖晶石结构的纯Fe_3O_4，而淀粉涂层未引起相变。还通过傅立叶变换红外（FTIR）光谱证明了在Fe_3O_4纳米颗粒上的淀粉涂层。磁性测量表明，淀粉-SPIONs的饱和磁化强度达到42.1 emu / g，具有具有超顺磁性的纳米颗粒，而在H2O3的研究中观察到剂量依赖性毒性和浓度低于62.5μg/ mL的无毒作用。对Neuro2A细胞的体外细胞毒性。

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