Impact of heating mode in synthesis of monodisperse iron-oxide nanoparticles via oleate decomposition
The present work introduces the optimization of a synthetic procedure for oleate-coated iron-oxide nanoparticles by the thermal decomposition of Fe oleate dried at 30 and 70 °C in high-boiling organic solvents. The attention is focused on the temperature of the thermal decomposition, the nature of organic solvent, heating rate and the mode of the heating. In particular, heating on Wood alloy with simultaneous bubbling of argon through the reaction mixture versus the heating on mantel with magnetic stirring is highlighted as a route to improve the monodispersity of the nanoparticles. The effect of heating mode and rate on the nanoparticles size is estimated. The obtained tendencies point to the heating mode and rate as additional factors affecting the kinetic separation between nucleation and nanoparticle growth processes.
KeywordsIron oxide Nanoparticles Nanotechnology Nucleation Nanomaterials Monodispersity
We are very thankful to Russian Fund for Basic Research (Project Number 13-03-12436_ofi_M2) for financial support. Mark H. Rümmeli thanks the IBS Korea (IBS-RO11-D1). Microscopic investigations for 1C sample were carried out in the laboratory “Transmission electron microscopy” of Kazan National Research Technological University. Electron microscopy characterization of 1D sample was performed in the Department of Structural Studies of Zelinsky Institute of Organic Chemistry, Moscow.
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