A Simple Method To Construct Bifunctional Fe3O4/Au Hybrid Nanostructures and Tune Their Optical Properties in the Near-Infrared Region

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• 作者：Yang Wang ; Yuhua Shen ; Anjian Xie ; Shikuo Li ; Xiufang Wang ; Yan Cai
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：March 18, 2010
• 年：2010
• 卷：114
• 期：10
• 页码：4297-4301
• 全文大小：208K
• 年卷期：v.114,no.10(March 18, 2010)
• ISSN：1932-7455

文摘

In this paper, we have developed a simple, facile, and efficient approach to synthesize bifunctional Fe₃O₄/Au hybrid nanostructure using l-cysteine as a linker. The morphology, composition, crystallinity, and magnetism of the as-prepared nanocomposites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), powder X-ray diffraction (XRD), and superconducting quantum interference device (SQUID). The results indicated that the spherical composite particles showed a monodispersity and supermagnetism. The surface of the composite spheres contained plentiful Au nanoparticles (NPs) smaller than 10 nm. And the absorption peak of the composite spheres could be conveniently tuned over a broad spectral range spanning from the visible to the near-infrared (NIR) by simply controlling the diameter of Fe₃O₄. This novel bifunctional hybrid nanostructure will open up an exciting opportunity in biomedical applications.