NDLI: Facile Synthesis, Phase Transfer, and Magnetic Properties of Monodisperse Magnetite Nanocubes

Content Provider	IEEE Xplore Digital Library
Author	Yang, H. Hasegawa, D. Takahashi, M. Ogawa, T.
Copyright Year	1965
Abstract	The monodisperse Fe₃O₄ nanocubes with controllable sizes from 6.5 to 30.0 nm have been synthesized in organic phase. By the formation of surfactant bilayers with charged hydrophilic ions of alpha -cyclodextrin, Fe₃O₄ nanocubes were successfully ldquopulledrdquo into water from hexane for a possible biomedical application. The Fe₃O₄ nanocubes with the surfactant bilayers show a good stability in aqueous solution compared with those in aqueous solution which were transferred from organic phase by ligand exchange using PVP with strong binding group. The hysteresis loop at 300 K of Fe₃O₄ nanocubes with different sizes reveals that a size-dependent behavior of saturation magnetization and the nanocubes with a size less than 25 nm show a typical superparamagnetic behavior at room temperature. The comparison of magnetization of the hydrophilic Fe₃O₄ nanocubes in CD and PVP aqueous solution reveals that the surfactant bilayers can provide a good stability of magnetization.
Sponsorship	IEEE Magnetics Society
Starting Page	3895
Ending Page	3898
Page Count	4
File Size	1564510
File Format	PDF
ISSN	00189464
Volume Number	44
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic properties Iron Nanobioscience Saturation magnetization Nanoparticles Size control Temperature Magnetic materials Stability Memory synthesis Magnetite nanocubes phase transfer
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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