Comparative Study between Magnetite Nanoparticles and Magnetite/Silver as a Core/Shell Nanostructure

作     者：Nabiha I. Abdo Nabiha I. Abdo

作者机构：Higher Institute of Engineering and Technology New Borg Al Arab City Alexandria Egypt 

出 版 物：《Advances in Nanoparticles》 (纳米粒子（英文）)

年 卷 期：2021年第10卷第4期

页      面：115-122页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Magnetite Nanoparticles (MNPs) Fe₃O₄ Silver Metal Core/Shell DLS SEM VSM 

摘      要：Magnetite nanoparticles (MNPs) and magnetite/silver nanoparticles (M/Ag NPs) were synthesized by chemical co-precipitation of Fe2+ and Fe3+. In case of M/Ag NPs, MNPs (core) were separately coated by silver metal (shell) in presence of glucose as a reducing agent. The particle size and morphology of the nanoparticles were characterized by dynamic light scattering (DLS) and scanning electron microscopy (SEM). Magnetic properties were investigated by vibrating sample magnetometry (VSM). The superparamagnetic natures of the nanoparticles were confirmed by the absence of the hysteresis loop. Coverage with silver produced a core-shell heterostructure which weakens magnetization of MNPs, inducing an inert character to the fnal nanostructure. The surface conjugation of MNPs with silver metal has been employed in order to improve the compatibility of magnetite nanoparticles to overcome their limitations in practical applications.