Facile Gold-Coated Maghemite Nanoparticles Fabrication

Author

He, Quanguo ; Huang, Jingke ; Hu, Rong ; Zeng, Lei

Author_Institution

Green Packaging & Biol. Nanotechnol. Lab., Hunan Univ. of Technol., Zhuzhou, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

5

Abstract

The maghemite (γ-Fe₂O₃) nanoparticles were obtained via high temperature pyrolysis with the precursor of magnetite that was synthesized via chemical coprecipitation. Then the (3-aminopropyl) triethoxysilane (APTES) was used for the surface functionalization of γ-Fe₂O₃ nanoparticles. Finally the gold-coated maghemite (γ-Fe₂O₃/Au) nanoparticles are prepared via sonochemical synthesis of a solution mixture of hydrochloroauric acid (HAuCl₄) and APTES-coated γ-Fe₂O₃ nanoparticles with further drop-addition of sodium citrate. The γ-Fe2O3/Au nanoparticles were characterized by X-ray powder diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), transmission electron microscopy (TEM) and superconducting quantumn inteference devices (SQUID). The γ-Fe₂O₃/Au nanoparticles with double properties of magnetism and colloidal gold may have intensive application in immunology, biochemistry, biomedical and molecular biology.

Keywords

X-ray diffraction; coating techniques; gold; iron compounds; nanofabrication; nanoparticles; precipitation; pyrolysis; surface treatment; transmission electron microscopy; ultraviolet spectra; visible spectra; (3-aminopropyl)triethoxysilane; APTES-coated γ-Fe₂O₃ nanoparticles; Fe₂O₃-Au; SQUID; TEM; X-ray powder diffraction; XRD; biochemistry; biomedical; chemical coprecipitation; colloidal gold; double magnetism properties; facile gold-coated maghemite nanoparticle fabrication; high temperature pyrolysis; hydrochloroauric acid; immunology; magnetite precursor; molecular biology; sodium citrate drop-addition; solution mixture; sonochemical synthesis; superconducting quantumn inteference devices; surface functionalization; transmission electron microscopy; ultraviolet-visible spectroscopy; Chemicals; Fabrication; Gold; Nanoparticles; Powders; Spectroscopy; Superconducting magnets; Temperature; X-ray diffraction; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on

Conference_Location

Chengdu

ISSN

2151-7614

Print_ISBN

978-1-4244-4712-1

Electronic_ISBN

2151-7614

Type

conf

DOI

10.1109/ICBBE.2010.5515475

Filename

5515475