Synthesis and characterization of silica-encapsulated iron oxide nanoparticles

Yimeng Du; Li Li; Chi Wah Leung; P. T. Lai; Philip W.T. Pong

doi:10.1109/TMAG.2013.2272215

Synthesis and characterization of silica-encapsulated iron oxide nanoparticles

Yimeng Du, Li Li, Chi Wah Leung, P. T. Lai, Philip W.T. Pong

Research output: Journal article publication › Journal article › Academic research › peer-review

8 Citations (Scopus)

Abstract

The properties of magnetic core-shell nanoparticles greatly depend on their core sizes and shell materials. Silica shell can prevent the magnetic nanoparticles from corrosion and agglomeration. In addition, the hydrolyzed silica can provide silanol groups to facilitate surface biofunctionalization. In this paper, superparamagnetic Fe3O4nanoparticles coated with SiO2shell were prepared by a one-pot water-in-oil microemulsion method. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM) were utilized to characterize the morphology and magnetic properties of the synthesized nanoparticles. The results indicated that by tuning the water/surfactant molar ratio (Wo) of the microemulsion system, core size of the resulting Fe3O4nanoparticles can be altered. The size-controllable silica-encapsulated Fe3O4superparamagnetic nanoparticles have great potential to be applied as multifunctional tracer materials for magnetic particle imaging (MPI).

Original language	English
Article number	2272215
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	1
DOIs	https://doi.org/10.1109/TMAG.2013.2272215
Publication status	Published - 1 Jan 2014

Keywords

Core-shell nanoparticles
Iron oxide nanoparticles
Magnetic particle imaging (MPI)
Microemulsion

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

More information

10.1109/TMAG.2013.2272215

Cite this

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title = "Synthesis and characterization of silica-encapsulated iron oxide nanoparticles",

abstract = "The properties of magnetic core-shell nanoparticles greatly depend on their core sizes and shell materials. Silica shell can prevent the magnetic nanoparticles from corrosion and agglomeration. In addition, the hydrolyzed silica can provide silanol groups to facilitate surface biofunctionalization. In this paper, superparamagnetic Fe3O4nanoparticles coated with SiO2shell were prepared by a one-pot water-in-oil microemulsion method. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM) were utilized to characterize the morphology and magnetic properties of the synthesized nanoparticles. The results indicated that by tuning the water/surfactant molar ratio (Wo) of the microemulsion system, core size of the resulting Fe3O4nanoparticles can be altered. The size-controllable silica-encapsulated Fe3O4superparamagnetic nanoparticles have great potential to be applied as multifunctional tracer materials for magnetic particle imaging (MPI).",

keywords = "Core-shell nanoparticles, Iron oxide nanoparticles, Magnetic particle imaging (MPI), Microemulsion",

author = "Yimeng Du and Li Li and Leung, {Chi Wah} and Lai, {P. T.} and Pong, {Philip W.T.}",

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AU - Li, Li

AU - Leung, Chi Wah

AU - Lai, P. T.

AU - Pong, Philip W.T.

PY - 2014/1/1

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N2 - The properties of magnetic core-shell nanoparticles greatly depend on their core sizes and shell materials. Silica shell can prevent the magnetic nanoparticles from corrosion and agglomeration. In addition, the hydrolyzed silica can provide silanol groups to facilitate surface biofunctionalization. In this paper, superparamagnetic Fe3O4nanoparticles coated with SiO2shell were prepared by a one-pot water-in-oil microemulsion method. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM) were utilized to characterize the morphology and magnetic properties of the synthesized nanoparticles. The results indicated that by tuning the water/surfactant molar ratio (Wo) of the microemulsion system, core size of the resulting Fe3O4nanoparticles can be altered. The size-controllable silica-encapsulated Fe3O4superparamagnetic nanoparticles have great potential to be applied as multifunctional tracer materials for magnetic particle imaging (MPI).

AB - The properties of magnetic core-shell nanoparticles greatly depend on their core sizes and shell materials. Silica shell can prevent the magnetic nanoparticles from corrosion and agglomeration. In addition, the hydrolyzed silica can provide silanol groups to facilitate surface biofunctionalization. In this paper, superparamagnetic Fe3O4nanoparticles coated with SiO2shell were prepared by a one-pot water-in-oil microemulsion method. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM) were utilized to characterize the morphology and magnetic properties of the synthesized nanoparticles. The results indicated that by tuning the water/surfactant molar ratio (Wo) of the microemulsion system, core size of the resulting Fe3O4nanoparticles can be altered. The size-controllable silica-encapsulated Fe3O4superparamagnetic nanoparticles have great potential to be applied as multifunctional tracer materials for magnetic particle imaging (MPI).

KW - Core-shell nanoparticles

KW - Iron oxide nanoparticles

KW - Magnetic particle imaging (MPI)

KW - Microemulsion

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Synthesis and characterization of silica-encapsulated iron oxide nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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