Synthesis and properties of Au－Fe3O4 and Ag－Fe3O4 heterodimeric nanoparticles

doi:10.1088/1674-1056/19/6/066102

Abstract Monodisperse Au--Fe₃O₄ heterodimeric nanoparticles (NPs) were prepared by injecting precursors into a hot reaction solution. The size of Au and Fe₃O₄ particles can be controlled by changing the injection temperature. UV--Vis spectra show that the surface plasma resonance band of Au--Fe₃O₄ heterodimeric NPs was evidently red-shifted compared with the resonance band of Au NPs of similar size. The as-prepared heterodimeric Au--Fe₃O₄ NPs exhibited superparamagnetic properties at room temperature. The Ag--Fe₃O₄ heterodimeric NPs were also prepared by this synthetic method simply using AgNO₃ as precursor instead of HAuCl₄. It is indicated that the reported method can be readily extended to the synthesis of other noble metal conjugated heterodimeric NPs.

Keywords: heterodimeric structure monodisperse Au--Fe₃O₄ nanoparticles

Received: 10 September 2009
Accepted manuscript online:

PACS:	81.16.-c	(Methods of micro- and nanofabrication and processing)
	61.46.Df	(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
	78.40.Ha	(Other nonmetallic inorganics)
	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)
	73.22.Lp	(Collective excitations)
	75.20.Ck	(Nonmetals)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~60571045 and 50872147) and the National High-Tech. Research and Development Program of China (Grant No.~2007AA03Z035).

Cite this article:

Ding Hao(丁皓), Shen Cheng-Min(申承民), Hui Chao(惠超), Xu Zhi-Chuan(徐梽川), Li Chen(李晨), Tian Yuan(田园), Shi Xue-Zhao(时雪钊), and Gao Hong-Jun (高鸿钧) Synthesis and properties of Au－Fe₃O₄ and Ag－Fe₃O₄ heterodimeric nanoparticles 2010 Chin. Phys. B 19 066102

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Synthesis and properties of Au－Fe3O4 and Ag－Fe3O4 heterodimeric nanoparticles

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Synthesis and properties of Au－Fe₃O₄ and Ag－Fe₃O₄ heterodimeric nanoparticles