Superparamagnetic Silica Composite Nanospheres (SSCNs) with ultrahigh loading of iron oxide nanoparticles via an oil-in-DEG microemulsion route

Ng Li; Eugene S.G. Choo; Jiabao Yi; Jun Ding; Xiaosheng Tang; Junmin Xue

doi:10.1021/cm8012107

Superparamagnetic Silica Composite Nanospheres (SSCNs) with ultrahigh loading of iron oxide nanoparticles via an oil-in-DEG microemulsion route

Ng Li
, Eugene S.G. Choo
, Jiabao Yi
, Jun Ding
, Xiaosheng Tang
, Junmin Xue^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

A method to prepare superparamagnetic silica composite nanospheres (SSCNs) by using iron oxide nanoparticles with ultrahigh loading through oil-in-DEG (diethylene glycol) microemulsion, was presented. The presented method involved hydrophobic SPIONs (superparamagnetic iron oxide nanoparticles) and tetraethylorthosilicate (TEOS) entrapped in oil droplets. It was observed that the hydrolysis and condensation of TEOS take place after ammonia diffuses through DEG. The use of hydrophobic SPIONs avoid the prior surface modification, while hydrolysis and condensation reaction take place only in presence of SPIONs. It was observed that the synthesized SSCNs produce higher saturation magnetization due to high loading density of SPIONs. This silica technique can be used for encapusalation of hydrophobic nanoparticles and quantum dots.

Original language	English
Pages (from-to)	6292-6294
Number of pages	3
Journal	Chemistry of Materials
Volume	20
Issue number	20
DOIs	https://doi.org/10.1021/cm8012107
State	Published - 28 Oct 2008
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm8012107

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title = "Superparamagnetic Silica Composite Nanospheres (SSCNs) with ultrahigh loading of iron oxide nanoparticles via an oil-in-DEG microemulsion route",

abstract = "A method to prepare superparamagnetic silica composite nanospheres (SSCNs) by using iron oxide nanoparticles with ultrahigh loading through oil-in-DEG (diethylene glycol) microemulsion, was presented. The presented method involved hydrophobic SPIONs (superparamagnetic iron oxide nanoparticles) and tetraethylorthosilicate (TEOS) entrapped in oil droplets. It was observed that the hydrolysis and condensation of TEOS take place after ammonia diffuses through DEG. The use of hydrophobic SPIONs avoid the prior surface modification, while hydrolysis and condensation reaction take place only in presence of SPIONs. It was observed that the synthesized SSCNs produce higher saturation magnetization due to high loading density of SPIONs. This silica technique can be used for encapusalation of hydrophobic nanoparticles and quantum dots.",

author = "Ng Li and Choo, \{Eugene S.G.\} and Jiabao Yi and Jun Ding and Xiaosheng Tang and Junmin Xue",

year = "2008",

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doi = "10.1021/cm8012107",

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T1 - Superparamagnetic Silica Composite Nanospheres (SSCNs) with ultrahigh loading of iron oxide nanoparticles via an oil-in-DEG microemulsion route

AU - Li, Ng

AU - Choo, Eugene S.G.

AU - Yi, Jiabao

AU - Ding, Jun

AU - Tang, Xiaosheng

AU - Xue, Junmin

PY - 2008/10/28

Y1 - 2008/10/28

N2 - A method to prepare superparamagnetic silica composite nanospheres (SSCNs) by using iron oxide nanoparticles with ultrahigh loading through oil-in-DEG (diethylene glycol) microemulsion, was presented. The presented method involved hydrophobic SPIONs (superparamagnetic iron oxide nanoparticles) and tetraethylorthosilicate (TEOS) entrapped in oil droplets. It was observed that the hydrolysis and condensation of TEOS take place after ammonia diffuses through DEG. The use of hydrophobic SPIONs avoid the prior surface modification, while hydrolysis and condensation reaction take place only in presence of SPIONs. It was observed that the synthesized SSCNs produce higher saturation magnetization due to high loading density of SPIONs. This silica technique can be used for encapusalation of hydrophobic nanoparticles and quantum dots.

AB - A method to prepare superparamagnetic silica composite nanospheres (SSCNs) by using iron oxide nanoparticles with ultrahigh loading through oil-in-DEG (diethylene glycol) microemulsion, was presented. The presented method involved hydrophobic SPIONs (superparamagnetic iron oxide nanoparticles) and tetraethylorthosilicate (TEOS) entrapped in oil droplets. It was observed that the hydrolysis and condensation of TEOS take place after ammonia diffuses through DEG. The use of hydrophobic SPIONs avoid the prior surface modification, while hydrolysis and condensation reaction take place only in presence of SPIONs. It was observed that the synthesized SSCNs produce higher saturation magnetization due to high loading density of SPIONs. This silica technique can be used for encapusalation of hydrophobic nanoparticles and quantum dots.

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M3 - Article

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SN - 0897-4756

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IS - 20

ER -

Superparamagnetic Silica Composite Nanospheres (SSCNs) with ultrahigh loading of iron oxide nanoparticles via an oil-in-DEG microemulsion route

Abstract

ASJC Scopus subject areas

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