Low-Temperature Synthesis of Superparamagnetic Fe3O4 Morphologies Tuned Using Oleic Acid as Crystal Growth Modifiers
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Several strategies have been established for the synthesis of magnetic nanoparticles with tunable sizes, morphologies, and magnetic properties. Most of these reports are based on synthesis of magnetic nanoparticles that involve use of environmentally malignant organic solvents and high temperature conditions. Many applications do not require precise control of particle morphology extreme reaction conditions, but with excellent magnetic properties. Here we present a facile, rapid, low temperature approach to synthesize crystalline Fe3O4 mesostructures with high magnetic properties via a microwave-assisted sonochemical method and studied the effects of conventional crystal growth modifiers: oleic acid (OA, long-chain fatty acid) in the evolution of Fe3O4 morphology. We observed that the transmission electron microscopy (TEM) investigations for OA as crystal growth modifier resulted in primary nanocrystals of hexagonal prism-like morphologies. The as-synthesized Fe3O4 exhibit superparamagnetic properties with high saturation magnetization and have no residual magnetism. Further, the cytotoxicity analysis of as-synthesized samples on H9c2 cells revealed that the samples were safe to cells at higher concentrations. Magnetite nanoparticles with high saturation magnetization are required for enhanced MRI detection, cancer treatment (magnetic hyperthermia), etc.
KeywordsSuperparamagnetic Magnetite nanoparticles Growth modifiers Fe3O4
M. R. Chandran and SoumyaValsalam are acknowledged for SEM acquisition and Kiran Mohan is acknowledged for TEM image acquisition. We thank Dr. K. G. K. Warrier (CSIR-NIIST) and Prof. Lennart Bergström (Stockholm University, Sweden) for fruitful discussions. Prof. E. U. Ikhuoria and Dr. Stanley O. Omorogbe thank TWAS-13-207RG/CHE/AF/AC_G-UNESCO FR; 3240277727 for financial support. This research was supported by CSIR network projects (CSIR’s NWP IntelCoat and M2D) and DAE-BRNS (Sanction No. 2012/34/62/BRNS) grants.
- 10.Bilecka I, Djerdj I, Niederberger M (2008) One-minute synthesis of crystalline binary and ternary metal oxide nanoparticles. Chem Commun 886–888Google Scholar