Synthesis and Characterization of Au/Fe3O4 Nanocomposite

Xiu Pei Yang; Zhi Jing Tan; Yu Li Fu; Gu Li; Hua Xu

doi:10.4028/www.scientific.net/AMR.1082.6

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1082Synthesis and Characterization of Au/Fe3O4...

Synthesis and Characterization of Au/Fe₃O₄ Nanocomposite

Abstract:

A new kind of surface-functionalized magnetic nanoparticles was fabricated by surface modification of ferroferric oxide with monolayer-protected gold nanoparticles. Ferroferric oxide nanoparticles were firstly synthesized by co-precipitating Fe²⁺ and Fe³⁺ ions in base solution, and then coated with a layer of 3-aminopropyltriethoxysilane by silanization reaction. Gold nanoparticles were surface-attached with 2-mercapto-4-methyl-5-thiazoleacetic acid which were subsequently linked to the modified ferroferric oxide nanoparticles to produce Au/Fe₃O₄ composite materials. The outer layer of ligand (2-mercapto-4-methyl-5-thiazoleacetic acid) on Au/Fe₃O₄ can function as binding sites for drugs and biomolecules, whereas the innermost magnetic cores are able to respond to an externally applied magnetic field. The as-synthesized Au/Fe₃O₄ nanocomposite is superparamagnetic (31.4 emu/g), thus rendering it potentially applicable in magnetic drug delivery and bioseparation.

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Advanced Materials Research (Volume 1082)

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6-9

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https://doi.org/10.4028/www.scientific.net/AMR.1082.6

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December 2014

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Xiu Pei Yang*, Zhi Jing Tan, Yu Li Fu, Gu Li, Hua Xu

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Chemical Synthesis, Electron Microscopy, Magnetic Materials, Magnetic Property, X-Ray Diffraction

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