Abstract

A novel nanostructured silver chromite with the chemical formula Ag₂Cr₂O₄ was synthesized at 400 °C by simple, cost effective, flash auto-combustion method. The average crystallite size was found to be 76.6 nm by crystallographic study of X-ray analysis (XRD) which also showed single-phase formation with spinel cubic structure. The formation of the sample was assured by measuring the Fourier transform infrared (FTIR) spectrum and the elemental study using energy dispersive X-ray (EDX) measurement. The field emission scanning electron microscopy (FESEM) and the atomic force microscopy (AFM) were studied which showed a spherical interlinked behavior with aggregations of the grains. The M–H curve showed an exchange bias which gave a slight horizontal shift in the curve. The obtained data extracted from the magnetic properties recommended the suitability of Ag₂Cr₂O₄ nanoparticles to be applied in information storage devices, MRAM, and sensor devices. Moreover, this is the first study to synthesize and analyze the characterization and antimicrobial properties of Ag₂Cr₂O₄ nanoparticles at 400 °C. A fascinating behavior appeared by studying the antimicrobial properties which gave a strong antibacterial efficacy against S. aureus and B. subtilis (G +) and also against P. aeruginosa (G −) bacterial species. Also, it gave a strong antifungal efficacy against A. flavus (Aspergillus) and C. albicans (Candida) fungal species. Thus, Ag₂Cr₂O₄ nanoparticles at 400 °C could be an attractive and an alternative antifungal and antibacterial nanomaterial that open new paths for new alternative nanomaterial chemotherapy against different bacteria and fungi.

中文翻译：

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亚铬酸银纳米粒子的合成，表征，磁性和抗菌性能

摘要

化学式为Ag ₂ Cr ₂ O _4的新型纳米亚铬酸银通过简单，经济高效的闪光自动燃烧方法在400°C下合成了该化合物。通过X射线分析（XRD）的晶体学研究发现平均微晶尺寸为76.6nm，其还显示具有尖晶石立方结构的单相形成。通过测量傅立叶变换红外（FTIR）光谱和使用能量色散X射线（EDX）测量进行元素研究，可以确保样品的形成。研究了场发射扫描电子显微镜（FESEM）和原子力显微镜（AFM），它们显示出具有颗粒聚集体的球形互连行为。M–H曲线显示交换偏斜，使曲线略有水平移动。从磁性能中提取的数据推荐了Ag ₂ Cr ₂的适用性O ₄纳米颗粒将应用于信息存储设备，MRAM和传感器设备中。此外，这是首次合成和分析400°C下Ag ₂ Cr ₂ O ₄纳米颗粒的表征和抗菌性能的研究。通过研究抗菌特性，表现出了令人着迷的行为，这些抗菌特性对金黄色葡萄球菌和枯草芽孢杆菌（G +）以及铜绿假单胞菌（G-）细菌都有很强的抗菌作用。而且，它对黄曲霉（曲霉）和白色念珠菌（念珠菌）真菌种类具有很强的抗真菌功效。因此，Ag ₂ Cr在400°C下的₂ O ₄纳米粒子可能是一种有吸引力的抗真菌和抗菌纳米材料的替代品，这为针对不同细菌和真菌的新型替代性纳米材料化学疗法开辟了新途径。