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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Polyvinyl alcohol: An efficient fuel for synthesis of superparamagnetic LSMO nanoparticles for biomedical application
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Polyvinyl alcohol: An efficient fuel for synthesis of superparamagnetic LSMO nanoparticles for biomedical application

机译：聚乙烯醇：一种用于生物医学应用的合成超顺磁性LSMO纳米颗粒的有效燃料

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摘要

La _(0.7)Sr _(0.3)MnO _3 (LSMO) nanoparticles have been prepared using glycine and polyvinyl alcohol (PVA) as fuels. Their crystal structure, particle morphology and compositions are characterized using X-ray diffraction, transmission electron microscopy, field-emission electron microscopy and energy dispersive analysis of X-ray. They show a pseudo-cubic perovskite structure. The spherical particle sizes of 30 and 20 nm have been obtained from samples prepared by glycine and PVA respectively. The field cooled (FC) and zero field cooled (ZFC) magnetizations have been recorded from 5 to 375 K at 500 Oe and superparamagnetic blocking temperatures (T _B) of 75 and 30 K are obtained from samples prepared by glycine and PVA respectively. Particle size distribution is observed from dynamic light scattering measurements. Dispersion stability of the particles in water is studied by measuring the Zeta potential with varying the pH of the medium from 1 to 12. Under induction heating experiments, a hyperthermia temperature (42-43 °C) is achieved by both the samples (3-6 mg mL ~(-1)) at magnetic fields of 167-335 Oe and at a frequency of 267 kHz. The bio-compatibility of the LSMO nanoparticles is studied on the L929 and HeLa cell lines by MTT assay for up to 48 h. The present work reveals the importance of synthesis technique and fuel choice on structural, morphological, magnetic, hyperthermia and biocompatible properties of LSMO and predicts the suitability for biomedical applications.
机译：使用甘氨酸和聚乙烯醇（PVA）作为燃料制备了La_（0.7）Sr_（0.3）MnO_3（LSMO）纳米粒子。使用X射线衍射，透射电子显微镜，场发射电子显微镜和X射线能量色散分析对它们的晶体结构，颗粒形态和组成进行了表征。它们显示出伪立方钙钛矿结构。从分别由甘氨酸和PVA制备的样品中获得了30和20 nm的球形粒径。在500 Oe的磁场冷却（FC）和零磁场冷却（ZFC）磁化强度已记录为5至375 K，分别从甘氨酸和PVA制备的样品获得75和30 K的超顺磁阻断温度（T _B）。从动态光散射测量观察到粒度分布。通过在1到12之间改变介质pH的条件下测量Zeta电位来研究颗粒在水中的分散稳定性。在感应加热实验中，两个样品均达到了高温（42-43°C）（3-在167-335 Oe的磁场和267 kHz的频率下为6 mg mL（（-1））。 LSMO纳米粒子的生物相容性通过MTT分析在L929和HeLa细胞系上研究了长达48小时。本工作揭示了合成技术和燃料选择对LSMO的结构，形态，磁性，高温和生物相容性的重要性，并预测了生物医学应用的适用性。

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