{"title":"铒取代锰铜铁氧体纳米颗粒:合成、结构、磁性和抗菌活性","authors":"N. I. Abu-Elsaad, Rabab A. Metwally, A. S. Nawara","doi":"10.1007/s13538-025-01784-z","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the citrate–nitrate auto combustion process was used to create spinel ferrite nanoparticles <i>Mn</i><sub><i>0.5</i></sub><i>Cu</i><sub><i>0.5</i></sub><i>Er</i><sub><i>x</i></sub><i>Fe</i><sub><i>2−x</i></sub><i>O</i><sub><i>4</i></sub>, where 0.0 ≤ <i>x</i> ≤ 0.075. An analysis was conducted to evaluate the influence of erbium doping on the antimicrobial, microstructural, morphological, and magnetic possessions. A pure single-phase cubic structure is revealed by the structural study of the produced samples with Er doping, but the second phase emerges at <i>x</i> = 0.075. Results show that the lattice parameter grows with incorporating Er<sup>3+</sup> concentration up to <i>x</i> = 0.06, after which it starts to drop at <i>x</i> = 0.075, which lies between 8.432 and 8.446 Å. The TEM pictures revealed nanoscale dimensions and a cubic spinel structure. A rise in the Er<sup>3+</sup> content in Mn-Cu nanoferrites caused a dramatic variation in the magnetic properties. The coercivity varied from 93.60 to 114.89 G, whereas the saturation magnetization (ranging from 54.83 to 40.42 emu/g) and remanence (from 11.57 to 7.61 emu/g) showed a general decreasing trend. The results of the microwave frequency measurements show that ferrites can be used in wireless communication technology. The evaluation of the antimicrobial efficacy of MCEF nanoparticles against pathogenic microorganisms, including <i>Bacillus cereus</i>, <i>Staphylococcus aureus</i>, <i>Pseudomonas aeruginosa</i>, <i>Fusarium oxysporum</i>, <i>Aspergillus flavus</i>, <i>A. terreus</i>, <i>A. fumigatus</i>, <i>A. niger</i>, and <i>Rhizopus </i>sp., demonstrated that MCF nanoparticles doped with erbium at concentrations of 0.03 and 0.075 exhibit enhanced inhibitory effects on the growth of all aforementioned microorganisms. The highest inhibition was observed at an erbium concentration of 0.075, with a mean crystallite size of 39.16 nm, surpassing the inhibition at 0.03 concentration, which had an average size of 49.36 nm, in comparison to the undoped nanoparticles. The microbiological studies demonstrate that these nanoparticles may serve as a prospective antimicrobial agent with reduced effects on <i>P. aeruginosa</i>.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13538-025-01784-z.pdf","citationCount":"0","resultStr":"{\"title\":\"Erbium Substituted Mn-Cu Ferrite Nanoparticles: Synthesis, Structural, Magnetic, and Antimicrobial Activity Properties\",\"authors\":\"N. I. Abu-Elsaad, Rabab A. Metwally, A. S. Nawara\",\"doi\":\"10.1007/s13538-025-01784-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, the citrate–nitrate auto combustion process was used to create spinel ferrite nanoparticles <i>Mn</i><sub><i>0.5</i></sub><i>Cu</i><sub><i>0.5</i></sub><i>Er</i><sub><i>x</i></sub><i>Fe</i><sub><i>2−x</i></sub><i>O</i><sub><i>4</i></sub>, where 0.0 ≤ <i>x</i> ≤ 0.075. An analysis was conducted to evaluate the influence of erbium doping on the antimicrobial, microstructural, morphological, and magnetic possessions. A pure single-phase cubic structure is revealed by the structural study of the produced samples with Er doping, but the second phase emerges at <i>x</i> = 0.075. Results show that the lattice parameter grows with incorporating Er<sup>3+</sup> concentration up to <i>x</i> = 0.06, after which it starts to drop at <i>x</i> = 0.075, which lies between 8.432 and 8.446 Å. The TEM pictures revealed nanoscale dimensions and a cubic spinel structure. A rise in the Er<sup>3+</sup> content in Mn-Cu nanoferrites caused a dramatic variation in the magnetic properties. The coercivity varied from 93.60 to 114.89 G, whereas the saturation magnetization (ranging from 54.83 to 40.42 emu/g) and remanence (from 11.57 to 7.61 emu/g) showed a general decreasing trend. The results of the microwave frequency measurements show that ferrites can be used in wireless communication technology. The evaluation of the antimicrobial efficacy of MCEF nanoparticles against pathogenic microorganisms, including <i>Bacillus cereus</i>, <i>Staphylococcus aureus</i>, <i>Pseudomonas aeruginosa</i>, <i>Fusarium oxysporum</i>, <i>Aspergillus flavus</i>, <i>A. terreus</i>, <i>A. fumigatus</i>, <i>A. niger</i>, and <i>Rhizopus </i>sp., demonstrated that MCF nanoparticles doped with erbium at concentrations of 0.03 and 0.075 exhibit enhanced inhibitory effects on the growth of all aforementioned microorganisms. The highest inhibition was observed at an erbium concentration of 0.075, with a mean crystallite size of 39.16 nm, surpassing the inhibition at 0.03 concentration, which had an average size of 49.36 nm, in comparison to the undoped nanoparticles. The microbiological studies demonstrate that these nanoparticles may serve as a prospective antimicrobial agent with reduced effects on <i>P. aeruginosa</i>.</p></div>\",\"PeriodicalId\":499,\"journal\":{\"name\":\"Brazilian Journal of Physics\",\"volume\":\"55 4\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2025-05-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s13538-025-01784-z.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Brazilian Journal of Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13538-025-01784-z\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brazilian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s13538-025-01784-z","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
In this study, the citrate–nitrate auto combustion process was used to create spinel ferrite nanoparticles Mn0.5Cu0.5ErxFe2−xO4, where 0.0 ≤ x ≤ 0.075. An analysis was conducted to evaluate the influence of erbium doping on the antimicrobial, microstructural, morphological, and magnetic possessions. A pure single-phase cubic structure is revealed by the structural study of the produced samples with Er doping, but the second phase emerges at x = 0.075. Results show that the lattice parameter grows with incorporating Er3+ concentration up to x = 0.06, after which it starts to drop at x = 0.075, which lies between 8.432 and 8.446 Å. The TEM pictures revealed nanoscale dimensions and a cubic spinel structure. A rise in the Er3+ content in Mn-Cu nanoferrites caused a dramatic variation in the magnetic properties. The coercivity varied from 93.60 to 114.89 G, whereas the saturation magnetization (ranging from 54.83 to 40.42 emu/g) and remanence (from 11.57 to 7.61 emu/g) showed a general decreasing trend. The results of the microwave frequency measurements show that ferrites can be used in wireless communication technology. The evaluation of the antimicrobial efficacy of MCEF nanoparticles against pathogenic microorganisms, including Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Fusarium oxysporum, Aspergillus flavus, A. terreus, A. fumigatus, A. niger, and Rhizopus sp., demonstrated that MCF nanoparticles doped with erbium at concentrations of 0.03 and 0.075 exhibit enhanced inhibitory effects on the growth of all aforementioned microorganisms. The highest inhibition was observed at an erbium concentration of 0.075, with a mean crystallite size of 39.16 nm, surpassing the inhibition at 0.03 concentration, which had an average size of 49.36 nm, in comparison to the undoped nanoparticles. The microbiological studies demonstrate that these nanoparticles may serve as a prospective antimicrobial agent with reduced effects on P. aeruginosa.
期刊介绍:
The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.