Self-Assembled Core-Shell Fe3O4@SiO2 Nanoparticles with High Magnetic Sensitivity from Electrospun Fibers

Li Qiang Tian; Pei Pei Zhang

doi:10.4028/www.scientific.net/AMR.1033-1034.1068

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1033-1034Self-Assembled Core-Shell Fe3O4@SiO2 Nanoparticles...

Self-Assembled Core-Shell Fe₃O₄@SiO₂Nanoparticles with High Magnetic Sensitivity from Electrospun Fibers

Abstract:

Nanofibers composed of the hydrophilic polymer polyvinylpyrrolidone K90 (PVP), cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) and Fe₃O₄ were fabricated using an electrospinning process. As a result of the templating and confinement properties of the nanfibers, silica coated magnetite (Fe₃O₄@SiO₂) core-shell nanoparticles (NPs) with high magnetic sensitivity were spontaneously formed through molecular self-assembly when the fibers were added to 80% aqueous ethanol (PH=9.0). The typical saturation magnetization of the Fe₃O₄@SiO₂ composite particles is up to 43.8 emu/g, with superparamagnetic properties being observed at room temperature. Since the nanoparticles have high magnetic sensitivity and are prepared via a facile and convenient strategy, they have much promise in a range of practical applications.

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Periodical:

Advanced Materials Research (Volumes 1033-1034)

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1068-1071

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https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.1068

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Online since:

October 2014

Authors:

Li Qiang Tian*, Pei Pei Zhang

Keywords:

Electrospinning, High Magnetic Sensitivity, Magnetic Nanoparticles

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