Synthesis and Morphology Control of Gold/Iron Oxide Magnetic Nanocomposites via a Simple Aqueous Method

Author

Li, Luoqing ; Mak, K.Y. ; Leung, C.W. ; Leung, C.H. ; Ruotolo, Antonio ; Chan, King Yuk ; Chan, W.K. ; Pong, Philip W. T.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

Volume

50

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

1

Lastpage

5

Abstract

Gold/iron oxide nanocomposites offer the promise of combining the unique traits of both gold and iron oxide nanomaterials to enable new applications. In this work, a simple and safe method has been established whereby the morphology of gold material in gold/iron oxide nanocomposites can be controlled to be nanowire or nanosphere by adjusting the initial molar ratio of citrate-coated iron oxide nanoparticles to auric acid. Gold/iron oxide nanowires and nanospheres were synthesized through this method. Their structural, optical, and magnetic properties were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), dynamic light scattering (DLS), ultraviolet-visible spectroscopy (UV-Vis), and vibrating sample magnetometry (VSM). These materials substantially maintained the optical properties of gold nanomaterials and magnetic features of iron oxide magnetic nanoparticles.

Keywords

X-ray chemical analysis; gold; iron compounds; light scattering; magnetic particles; magnetisation; nanocomposites; nanofabrication; nanoparticles; nanowires; transmission electron microscopy; ultraviolet spectra; visible spectra; Au-Fe₂O₃; DLS; EDS; TEM; VSM; auric acid; citrate-coated iron oxide nanoparticles; dynamic light scattering; energy-dispersive X-ray spectroscopy; gold-iron oxide magnetic nanocomposites; gold-iron oxide nanowires; iron oxide magnetic nanoparticles; magnetic properties; morphology control; nanosphere; nanowire; optical properties; saturation magnetization; simple aqueous method; structural properties; transmission electron microscopy; ultraviolet-visible spectroscopy; vibrating sample magnetometry; Gold; Iron; Magnetic resonance imaging; Morphology; Nanocomposites; Nanoparticles; Gold; iron oxide; morphology control; nanosphere; nanowire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2274457

Filename

6693006