Monosized core-shell Fe 3O 4(Fe)/Au multifunctional nanocrystals

Hong Ling Liu; Jun Hua Wu; Ji Hyun Min; Ju Hun Lee; Young Keun Kim

doi:10.1166/jnn.2009.C018

Monosized core-shell Fe ₃O ₄(Fe)/Au multifunctional nanocrystals

Hong Ling Liu, Jun Hua Wu, Ji Hyun Min, Ju Hun Lee, Young Keun Kim

Department of Materials Science and Engineering

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

21 Citations (Scopus)

Abstract

We have synthesized highly crystalline, monosized Fe ₃O ₄(Fe)/Au magnetic-optic multifunctional nanocrystals using a modified polyol process. The formation of the core-shell structure was achieved in two consecutive steps, seeding the Fe ₃O ₄(Fe) core followed by coating the gold shell. The characterization demonstrates the core-shell nanostructure and provides particle size and distribution of the nanocrystals. The spectroscopic analysis gives three Fe oxidation states (Fe ⁰, Fe ⁺² and Fe ⁺³) in the core and the surface plasmon characteristic of the Au nanoshell, while the magnetic measurements show excellent susceptibility of the nanocrystals.

Original language	English
Pages (from-to)	754-758
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	9
Issue number	2
DOIs	https://doi.org/10.1166/jnn.2009.C018
Publication status	Published - 2009 Feb

Keywords

Core-Shell
Magnetic
Multifunctional
Nanoparticles
Optical

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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abstract = "We have synthesized highly crystalline, monosized Fe 3O 4(Fe)/Au magnetic-optic multifunctional nanocrystals using a modified polyol process. The formation of the core-shell structure was achieved in two consecutive steps, seeding the Fe 3O 4(Fe) core followed by coating the gold shell. The characterization demonstrates the core-shell nanostructure and provides particle size and distribution of the nanocrystals. The spectroscopic analysis gives three Fe oxidation states (Fe 0, Fe +2 and Fe +3) in the core and the surface plasmon characteristic of the Au nanoshell, while the magnetic measurements show excellent susceptibility of the nanocrystals.",

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AU - Kim, Young Keun

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AB - We have synthesized highly crystalline, monosized Fe 3O 4(Fe)/Au magnetic-optic multifunctional nanocrystals using a modified polyol process. The formation of the core-shell structure was achieved in two consecutive steps, seeding the Fe 3O 4(Fe) core followed by coating the gold shell. The characterization demonstrates the core-shell nanostructure and provides particle size and distribution of the nanocrystals. The spectroscopic analysis gives three Fe oxidation states (Fe 0, Fe +2 and Fe +3) in the core and the surface plasmon characteristic of the Au nanoshell, while the magnetic measurements show excellent susceptibility of the nanocrystals.

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KW - Optical

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