Synthesis and characterization of multifunctional silica core-shell nanocomposites with magnetic and fluorescent functionalities

Zhiya Ma; Dosi Dosev; Mikaela Nichkova; Randy K. Dumas; Shirley J. Gee; Bruce D. Hammock; Kai Liu; Ian M. Kennedy

doi:10.1016/j.jmmm.2009.02.040

Synthesis and characterization of multifunctional silica core-shell nanocomposites with magnetic and fluorescent functionalities

Zhiya Ma, Dosi Dosev, Mikaela Nichkova, Randy K. Dumas, Shirley J. Gee, Bruce D. Hammock, Kai Liu, Ian M. Kennedy

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

47 Scopus citations

Abstract

Multifunctional core-shell nanocomposites with a magnetic core and a silica shell doped with lanthanide chelate have been prepared by a simple method. First, citric acid-modified magnetite nanoparticles were synthesized by a chemical coprecipitation method. Then the magnetite nanoparticles were coated with silica shells doped with terbium (Tb³⁺) complex by a modified Stöber method based on hydrolyzing and condensation of tetraethyl orthosilicate (TEOS) and a silane precursor. These multifunctional nanocomposites are potentially useful in a variety of biological areas such as bio-imaging, bio-labeling and bioassays because they can be simultaneously manipulated with an external magnetic field and exhibit unique phosphorescence properties.

Original language	English (US)
Pages (from-to)	1368-1371
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	321
Issue number	10
DOIs	https://doi.org/10.1016/j.jmmm.2009.02.040
State	Published - May 2009

Keywords

Core-shell structure
Lanthanide chelate
Magnetite nanoparticle
Multifunctional nanocomposite
Silica

ASJC Scopus subject areas

Condensed Matter Physics
Electronic, Optical and Magnetic Materials

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Synthesis and characterization of multifunctional silica core-shell nanocomposites with magnetic and fluorescent functionalities. / Ma, Zhiya; Dosev, Dosi; Nichkova, Mikaela; Dumas, Randy K.; Gee, Shirley J.; Hammock, Bruce D.; Liu, Kai; Kennedy, Ian M.

In: Journal of Magnetism and Magnetic Materials, Vol. 321, No. 10, 05.2009, p. 1368-1371.

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

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abstract = "Multifunctional core-shell nanocomposites with a magnetic core and a silica shell doped with lanthanide chelate have been prepared by a simple method. First, citric acid-modified magnetite nanoparticles were synthesized by a chemical coprecipitation method. Then the magnetite nanoparticles were coated with silica shells doped with terbium (Tb3+) complex by a modified St{\"o}ber method based on hydrolyzing and condensation of tetraethyl orthosilicate (TEOS) and a silane precursor. These multifunctional nanocomposites are potentially useful in a variety of biological areas such as bio-imaging, bio-labeling and bioassays because they can be simultaneously manipulated with an external magnetic field and exhibit unique phosphorescence properties.",

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AU - Hammock, Bruce D.

AU - Liu, Kai

AU - Kennedy, Ian M.

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