Abstract
Ascorbic acid-coated, transition metal-doped Fe3O4 nanoparticles were successfully synthesized via coprecipitation. The synthesized Zn-doped Fe3O4 nanoparticles have an average diameter of approximately 30 nm. These nanoparticles exhibit ferromagnetic properties at room temperature, with the highest saturation magnetization approaching 40 emu/g and decreasing coercivity. The surface was functionalized with ascorbic acid, which served as a surfactant to ensure high dispersibility and stability of the Fe3O4 nanoparticles in a brine solution containing 30,000 ppm NaCl. Zeta potential and interfacial tension (IFT) measurements were conducted to assess the suspension quality, confirming the effectiveness of the ascorbic acid coating in stabilizing the nanoparticles.
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