The silver chromite (Ag_0.5Cr_2.5O₄) nanoparticles were prepared by one of the easiest wet chemical flash method. Thermal stability was appeared at high annealing temperature 900 °C. The crystallite and particle size was estimated, from X-ray diffraction peaks and from the field emission scanning electron microscopy, to be about 47.9 and 65.1 nm respectively. The composition of the investigated sample was determined using the X-ray dispersion analysis and the sample is single phase spinel structure. Thus, this is an evidence that Ag_0.5Cr_2.5O₄ nanoparticles was prepared at this high annealing temperature (900 °C). From the magnetic measurements, a superparamagnetic behavior was appeared and it can be used strongly in antimicrobial application. During this application, Ag_0.5Cr_2.5O₄ nanoparticles showed strong antibacterial activity against Gram-positive microorganisms. Thus, it is highly recommended to use Ag_0.5Cr_2.5O₄ nanoparticles to be as antibacterial drug against Gram-positive bacteria.

中文翻译：

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高退火温度对生物医学应用亚铬酸银纳米粒子的结构，磁性和抗菌活性的影响

通过最简单的湿式化学闪蒸法之一制备亚铬酸银（Ag _0.5 Cr _2.5 O ₄）纳米颗粒。在900℃的高退火温度下出现了热稳定性。根据X射线衍射峰和根据场发射扫描电子显微镜，估计晶体和粒径分别为约47.9nm和65.1nm。使用X射线色散分析确定所研究样品的组成，并且样品为单相尖晶石结构。因此，这表明Ag _0.5 Cr _2.5 O ₄在此高退火温度（900°C）下制备了纳米颗粒。从磁学测量中，出现了超顺磁行为，它可以在抗菌应用中强力使用。在此应用过程中，Ag _0.5 Cr _2.5 O ₄纳米颗粒对革兰氏阳性微生物表现出强大的抗菌活性。因此，强烈建议使用Ag _0.5 Cr _2.5 O ₄纳米颗粒作为革兰氏阳性细菌的抗菌药物。