In this work, synthesis and characterization of SrFeO_3-δ nanoparticles as antimicrobial agent are presented. Structural characterization of SrFeO_3-δ sample shows that it has a cubic (Pm3m) phase with minor tetragonal phase. The morphology of the SrFeO_3-δ nanoparticles sample was characterized by a field emission scanning electron microscope (FE-SEM) and high resolution transmission electron microscopy (HRTEM). Mössbauer spectroscopy and X-ray photoelectron spectroscopy (XPS) results showed that the iron exists in oxidation states Fe³⁺, Fe^3.5+, and Fe⁴⁺. The SrFeO_3-δ nanoparticles sample exhibits energy band gap (E_g = 1.75 eV) which lies in the Visible region. Thermal and magnetic studies provide an evidence for ferroelectricity and antiferromagnetic with small amount of ferromagnetic in SrFeO_3-δ nanoparticles sample, respectively. SrFeO_3-δ nanoparticles sample showing powerful activity to fight both of tested Gram-positive, Gram-negative bacteria, and fungi strains. The antimicrobial activity as well as the minimal inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of the SrFeO_3-δ nanoparticles sample have been investigated.

在这项工作中，提出了作为抗菌剂的SrFeO3 _-δ纳米粒子的合成和表征。SrFeO3 _-δ样品的结构表征表明，它具有立方相（Pm3m）和次要四方相。通过场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HRTEM）对SrFeO3 _-δ纳米粒子样品的形貌进行了表征。Mössbauer光谱和X射线光电子能谱（XPS）结果表明，铁以Fe ³⁺，Fe ^3.5+和Fe ^4+的氧化态存在。SrFeO3 _-δ纳米颗粒样品显示出能带隙（E _g = 1.75 eV）位于可见区域。热学和磁学研究分别为SrFeO3 _-δ纳米颗粒样品中的少量铁磁提供了铁电和反铁磁的证据。SrFeO3 _-δ纳米颗粒样品显示出强大的活性，可与测试的革兰氏阳性菌，革兰氏阴性菌和真菌菌株对抗。研究了SrFeO3 _-δ纳米颗粒样品的抗菌活性以及最小抑菌浓度（MIC）和最小杀菌浓度（MBC）。