Nano Magnetite Particles Prepared under the Combined Addition of Urea and Ammonia

Young Keun Jeong; Dae Kyu Shin; Hong Jae Lee; Kyung Sik Oh; Jong Heun Lee; Doh Hyung Riu

doi:10.4028/www.scientific.net/KEM.317-318.203

Paper Titles

Low Cost Si₃N₄/SiC Nanocomposites, Processing, RT and HT Properties
p.185

Fabrication of Si₃ N₄-TiN Nanocomposites via Various Routes
p.191

Hydrothermal Synthesis of Nano ZrO₂ Powders
p.195

Synthesis of Nanocrystalline α-Al₂O₃ Using a 2-Step Calcination Method
p.199

Nano Magnetite Particles Prepared under the Combined Addition of Urea and Ammonia
p.203

Synthesis of Nano-Scaled α-Al₂O₃ Particles by Combustion Spray Pyrolysis
p.207

Synthesis of SiC Nano-Powders by Solid-Vapor Reaction
p.211

Formation Mechanism of Nano AlN Powder by Gas-Reduction-Nitridation
p.215

Synthesis of Metal Oxide Hollow Nanoparticles by Chemical Vapor Condensation Process
p.219

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Nano Magnetite Particles Prepared under the Combined Addition of Urea and Ammonia

Abstract:

Magnetite (Fe3O4) particles were prepared for biomedical application through three different routes. Each route had the difference in the selection of pH controlling agents. Ammonia, Urea and combined use of ammonia and urea were tested in the synthesis through co-precipitation. With the combined use of urea and ammonia, the size of particles could be reduced as small as 10 nm while effectively suppressing the agglomeration among particles. The surface charge measured at physiological condition explained the good dispersion behavior of nano-magnetite particles. The superparamagnetism observed in nano magnetite particles was expected to be useful for biomedical application in the respect of magnetic localization and dispersion.