Almessiere Munirah Abdullah, Slimani Yassine, Güngüneş Hakan, Korkmaz Ayse Demir, Zubar Tatiana, Trukhanov Sergei, Trukhanov Alex, Manikandan Ayyar, Alahmari Fatimah, Baykal Abdulhadi
Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.
Department of Physics, Hitit University, Çevre Yolu Bulvarı-Çorum 19030, Turkey.
ACS Omega. 2021 Apr 8;6(15):10266-10280. doi: 10.1021/acsomega.1c00611. eCollection 2021 Apr 20.
[NiCuZn](Fe Dy )O spinel ferrite nanoparticles with different Dy concentrations (0.00 ≤ ≤ 0.04) were prepared by a citrate sol-gel auto-combustion technique. A strong correlation among Dy concentration, structural parameters, and magnetic, electrical, and microwave properties was established. An increase in the Dy concentration is the reason for a rise in the crystal structure parameters (due to different ionic radii of Fe and Dy ions) and a slight increase in the average particle size with a minor reduction in the specific surface area. It was observed that Dy ions prefer to occupy the octahedral B site due to their large ionic radius (0.91 Å). The explanation of the electrical and magnetic properties was given in terms of the features of Dy-O-Fe dysprosium-oxygen-iron indirect exchange. The occurrence of the intensive changes in amplitude-frequency characteristics was observed from 1.6 to 2.7 GHz. The explanation of electromagnetic absorption was given in terms of the peculiarities of the microstructure (resonance of domain boundaries). The results open perspectives in the utilization of [NiCuZn](Fe Dy )O spinel ferrite nanoparticles as functional materials for targeted drug delivery and hyperthermia applications.
采用柠檬酸盐溶胶 - 凝胶自燃烧技术制备了具有不同镝(Dy)浓度(0.00≤ ≤0.04)的[NiCuZn](Fe Dy )O 尖晶石铁氧体纳米颗粒。建立了镝浓度、结构参数与磁、电和微波性能之间的强相关性。镝浓度的增加是晶体结构参数增加的原因(由于铁离子和镝离子的离子半径不同),且平均粒径略有增加,比表面积略有减小。观察到镝离子因其较大的离子半径(0.91 Å)而倾向于占据八面体 B 位。从镝 - 氧 - 铁间接交换的特征方面对电和磁性能进行了解释。在1.6至2.7 GHz范围内观察到幅度 - 频率特性发生强烈变化。从微观结构的特性(畴界共振)方面对电磁吸收进行了解释。这些结果为将[NiCuZn](Fe Dy )O 尖晶石铁氧体纳米颗粒用作靶向药物递送和热疗应用的功能材料开辟了前景。