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Co0 superparamagnetic nanoparticles stabilized by an organic layer coating with antimicrobial activity

机译：COO通过有机层涂层稳定具有抗微生物活性的COO超顺磁性纳米颗粒

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Cobalt (Co) is one of the most promising materials in nanotechnology due to its superior magnetic properties. However, due to the high cytotoxicity of cobalt, the activity in biological systems has been little studied. In this work, we report the structural, morphological, and magnetic properties of cobalt nanoparticles stabilized with an organic layer (Co ~(0) @C-NPs) and its potential antimicrobial activity. The Co ~(0) @C-NPs were obtained from solvothermal conditions and characterized by X-ray powder diffraction, electronic microscopy, and magnetic measurements. The organic layer was analysed by thermogravimetric analysis, Scanning Electron Microscopy, Energy Dispersive Spectrometer, and Fourier Transform Infrared Spectroscopy. From the TEM image, an organic coating layer is observed around Co ~(0) where this coating prevents NPs from oxidation allowing it to remain stable until 400 °C. Surface composition studies by SEM/EDS allowed the identification of carbon, oxygen, and cobalt elements present in the organic layer. This result was corroborated later by FITR analysis. Preliminary antibacterial properties were also investigated, which showed that the cobalt nanoparticles are active against Staphylococcus aureus after 1 h of exposure. The superparamagnetic properties and organic coating Co ~(0) @C-NPs could be biocompatible with biological systems, but more research is needed to apply these nanoparticles in biomedical products.
机译：钴（CO）是由于其优异的磁性而导致纳米技术最有希望的材料之一。然而，由于钴的高细胞毒性，生物系统中的活性很少研究过。在这项工作中，我们报告了用有机层（CO〜（0）@ C-NPS）稳定的钴纳米颗粒的结构，形态和磁性和其潜在的抗微生物活性。 CO〜（0）@ C-NPS是从溶剂热条件下获得的，其特征在于X射线粉末衍射，电子显微镜和磁测量。通过热重分析，扫描电子显微镜，能量分散光谱仪和傅里叶变换红外光谱分析有机层。从TEM图像，在CO〜（0）周围观察有机涂层，其中该涂层可防止NPS氧化，使其保持稳定直至400℃。 SEM / EDS的表面组成研究允许鉴定存在于有机层中的碳，氧和钴元件。通过FITR分析以后，该结果得到了证实。还研究了初步抗菌性质，表明在接触1小时后，钴纳米粒子对金黄色葡萄球菌有效。超顺磁性和有机涂料CO〜（0）/ @ C-NPS可以是与生物系统生物相容的，但需要更多的研究来应用这些纳米颗粒在生物医学产品中。

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