Abstract Iron oxide superparticles referring to a cluster of smaller nanoparticles have recently attracted much attention because of their enhanced magnetic moments but maintaining superparamagnetic behavior. In this study, iron oxide superparticles have been synthesized using a solvothermal method in the presence of six different polymers (e.g., sodium polyacrylate, pectin sodium alginate, chitosan oligosaccharides, polyethylene glycol, and polyvinylpyrrolidine). The functional group variation in these polymers affected their interactions with precursor iron ions, and subsequently influenced crystalline grain sizes within superparticles and their magnetic properties. These superparticles were extensively characterized by transmission electron microscopy, dynamic light scattering, x-ray diffraction, Fourier transform infrared spectroscopy, and vibrating sample magnetometry.

中文翻译：

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各种聚合物氧化铁超粒子的合成与表征

摘要 氧化铁超粒子是指一群较小的纳米粒子，由于其磁矩增强但保持超顺磁行为，最近引起了广泛的关注。在这项研究中，在六种不同聚合物（例如聚丙烯酸钠、果胶海藻酸钠、壳寡糖、聚乙二醇和聚乙烯吡咯烷）存在下，使用溶剂热法合成了氧化铁超粒子。这些聚合物中官能团的变化影响它们与前体铁离子的相互作用，并随后影响超粒子内的晶粒尺寸及其磁性。这些超粒子通过透射电子显微镜、动态光散射、X 射线衍射、傅里叶变换红外光谱和振动样品磁强计进行了广泛的表征。