Characterization of Carbon-Encapsulated Nickel and Iron Nanoparticles by Means of X-ray Absorption and Photoelectron Spectroscopy

• Published in: Journal of physical chemistry. C Vol. 114; no. 51; pp. 22413 - 22416
• Main Authors: Galakhov, V. R, Shkvarin, A. S, Semenova, A. S, Uimin, M. A, Mysik, A. A, Shchegoleva, N. N, Yermakov, A. Ye, Kurmaev, E. Z
• Format: Journal Article
• Language: English
• Published: American Chemical Society 30-12-2010
• Subjects: C: Nanops and Nanostructures
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp106612b

Nickel and iron nanoparticles encapsulated in carbon were synthesized by contactless levitation melting of metal drops and their evaporation in a flow of an inert gas containing a hydrocarbon. The products were characterized by means of transmission electron microscopy, photoelectron spectroscopy, and X-ray absorption spectroscopy. It was established that carbon coating protects the metallic nanoparticles from the environmental degradation by providing a barrier against oxidation and ensures stability of the ferromagnetic core metal inside that provides their extremely high catalytic activity, biocompatibility, and nontoxicity.