Amine-Functionalized Fe2O3–SiO2 Core–Shell Nanoparticles With Tunable Sizes

Iron oxide magnetic nanoparticles (MNPs) coated with uniform silica shell were synthesized through thermal decomposition and inverse microemulsion methods. The iron oxide MNPs were further coated with silica shells through hydrolysis reaction. For the resulting core-shell MNPs, size regulation of bo...

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Bibliographic Details
Published inIEEE transactions on nanotechnology Vol. 17; no. 1; pp. 69 - 77
Main Authors Teng, Yun, Jiang, Chengpeng, Ruotolo, Antonio, Pong, Philip W. T.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Core-shell nanoparticle
Core-shell particles
Gold
Heating
Hematite
Iron
Iron oxides
Magnetic cores
magnetic nanoparticle
Magnetic properties
nanoparticle functionalization
nanoparticle size control
Nanoparticles
Silicon compounds
Silicon dioxide
Surface treatment
Thermal decomposition
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Summary:Iron oxide magnetic nanoparticles (MNPs) coated with uniform silica shell were synthesized through thermal decomposition and inverse microemulsion methods. The iron oxide MNPs were further coated with silica shells through hydrolysis reaction. For the resulting core-shell MNPs, size regulation of both the magnetic core and the porous shell were achieved, enabling the modulation of their magnetic properties and magnetic interactions. Core-shell MNPs were finally functionalized with amine groups, and immobilized on gold surface due to charge-neutral amine/gold interactions. It was observed that the immobilization process was enhanced under external magnetic field.
ISSN:1536-125X
1941-0085
DOI:10.1109/TNANO.2016.2636254