Effects of Surfactants and Synthetic Conditions on the Sizes and Self-Assembly of Monodisperse Iron Oxide Nanoparticles

Journal Article · Tue Feb 17 04:00:00 EST 2004 · Journal of Material Chemistry

DOI:https://doi.org/10.1039/b311610g· OSTI ID:821361

Teng, X ^[1]; Yang, H

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY

(B204)Monodisperse iron oxide nanoparticles made from the thermal decomposition of iron carbonyl in octyl ether in the presence of oleic and stearic acids have been examined under various reaction conditions. Monodisperse particles with diameters of 3, 5, 10, 16 and 25 nm have been made. Ostwald ripening could be the key reason for making monodisperse nanoparticles with diameters of up to 25 nm, above the largest sizes that have been reported so far for this class of materials. When stearic acid was used as surfactant, the reaction mixtures can reflux at a lower temperature than the reaction using oleic acid, and monodisperse 3 nm Fe2O3 particles can be made. By controlling the temperatures during the drop casting, different superstructures and superlattices can be created. The nanoparticles and their assembly have been characterized by transmission electron microscopy, electron diffraction, powder X-ray diffraction, and X-ray photoemission spectroscopy.

• Research Organization: Laboratory for Laser Energetics (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 821361
• Report Number(s): DOE/SF-19460-517; 1426; 2003-181
• Journal Information: Journal of Material Chemistry, Journal Name: Journal of Material Chemistry Journal Issue: 4 Vol. 14
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBONYLS
CASTING
ELECTRON DIFFRACTION
ETHYL ETHER
IRON
IRON OXIDES
MIXTURES
OCTADECANOIC ACID
OLEIC ACID
PHOTOEMISSION
PYROLYSIS
RIPENING
SPECTROSCOPY
SUPERLATTICES
SURFACTANTS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION