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Title of Journal: J Nanopart Res

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Abbravation: Journal of Nanoparticle Research

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Springer Netherlands

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DOI

10.1002/dvdy.10402

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1572-896X

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Preparation and characterization of FeSubscript3

Authors: LiHua Fan YanLing Luo YaShao Chen ChangHu Zhang QingBo Wei
Publish Date: 2008/11/19
Volume: 11, Issue: 2, Pages: 449-458
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Abstract

A magnetic core–shelllayered polymer microsphere MPS was successfully synthesized by a dispersion polymerization route where the modified Fe3O4 nanoparticles MFN were used as a core while polymaleic anhydridecomethacrylic acid PMAHcoMAA as a shell was covered on the surface of the Fe3O4 nanoparticles Environmental scanning electron microscope ESME and transmission electron microscope TEM measurements indicate that the magnetic PMAHcoMAA/Fe3O4 composite microspheres assume sphericity and have a novel core–shelllayered structure The crystal particle sizes of the unimproved Fe3O4 and the MFN samples vary from 8 to 16 nm in diameter and the average size is about 106 nm in diameter The core–shell magnetic composite microspheres can be adjusted by changing the stirring speed Since multiple Fe3O4 cores were coated with a proper percentage of PMAHcoMAA copolymers and therefore lower density was acquired for the MPS which improved sedimentation and dispersion behavior The saturated magnetization of pure Fe3O4 nanoparticles reaches 481 emu g−1 and the value for composite nanoparticles was as high as 1735 emu g−1 The nanoparticles show strong superparamagnetic characteristics and can be expected to be used as a candidate for magnetismcontrolled drug release

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