Growth Mechanisms and Oxidation Resistance of Gold-Coated Iron Nanoparticles
By Sung-Jin Cho, J. Idrobo, J. Olamit, Kai Liu, N. Browning, S. Kauzlarich. 2005
216 citations recorded by the source corpus.
We report the chemical synthesis of Fe-core/Au-shell nanoparticles by a reverse micelle method and the investigation of their growth mechanisms and oxidation-resistant characteristics. The core−shell structure and the presence of the Fe and Au phases have been confirmed by transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Mossbauer spectroscopy, and inductively coupled plasma techniques. Additionally, atomic-resolution Z-contrast imaging and electron energy loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM) have been used to study details of the growth processes. The Au shell grows by nucleating on the Fe-core surface before coalescing. The magnetic moments of such nanoparticles, in the loose powder form, decrease over time due to oxidation. The less than ideal oxidation resistance of the Au shell may have been caused by the rough Au surfaces. However, in pressed pellet form, electrical transport measurements show that the particles are fairly...
Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/9bee23af6aacdcafab6255890c97c8ae5e1475af
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In Atomic and Molecular Physics, and Optics
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In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Magnetic nanocomposites for environmental remediation (2013, background): “To protect the magnetic NPs against oxidation, a shell structure is often introduced, including silica [56–59], polymer [52,60,61], carbon [27] and noble metals [62–64].”
- Synthesis of magnetic core–shell Fe3O4–Au nanoparticle for biomolecule immobilization and detection (2010, background): “The well-known surface chemistry of gold has been proven that it exhibits good surface for subsequent functionalization and it may provide not only the stability to the magnetic nanoparticles in solution but also helps in binding the various chemical and biological agents (Lin et al. 2001; Cho et a”