Microstructural and magnetic properties of magnetic fluid based on magnetite coated with tartaric acid

M. Rácuciu¹ , D. E. Creangã² , A. Airinei³ , V. Badescu⁴ , N. Apetroaie²

¹ "Lucian Blaga" University, Faculty of Science, 5-7 Dr. I.Ratiu Str., Sibiu, 550024, Romania
² "Al. I. Cuza" University, Faculty of Physics, 11A Blvd.Copou, 700506, Iasi, Romania
³ "P. Poni" Institute of Macromolecular Chemistry, Iasi, Romania
⁴ National Institute of Research and Development for Technical Physics, 47 Blvd. D. Mangeron, Iasi, Romania

Abstract
An aqueous magnetic fluid based on iron oxide particles as solid nano-magnetic phase was prepared by applying the chemical precipitation method. Tartaric acid (C₄H₆O₆) was used to functionalize magnetic cores. Physical tests have been performed in order to reveal the microstructural and magnetic features, their optimization being needed for biomedical utilization. The colloidal particles' size was investigated using transmission electron microscopy (TEM), atomic force microscopy (AFM) and magnetization measurements. Fourier transform infrared absorption spectra (FT-IR) have been recorded aiming to get some information on the solid phase structure. Figs 5, Refs 21.