The synthesis, structure, and properties of carbon-containing nanocomposites based on nickel, palladium, and iron

Ермаков, А. Е.; Уймин, М. А.; Локтева, Е. С.; Мысик, А. А.; Kachevskii, S. A.; Turakulova, A. O.; Гавико, В. С.; Лунин, В. В.

doi:10.1134/s0036024409070243

Cited by 23 publications

(15 citation statements)

References 16 publications

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“…[1][2][3][4][5][6][7][8][9][10][11] In order to prevent metallic nanoparticles from oxidation and agglomerations upon thermal treatments, they are encapsulated in carbon. [12][13][14][15] Metallic nanoparticles wrapped in carbon layers can retain the intrinsic properties of metals at nanoscales. Magnetic properties of these systems depend on sizes of the particles as well as their degree of crystallinity and the chemical state.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the combination of carbon coating and metallic cores having 'coreshell' structure provides unusual catalytic properties to these nanocomposites. 13,14 However, up to now, the nature of the catalytic activity of the mentioned nanoparticles is still an open question.…”

Section: Introductionmentioning

confidence: 99%

“…Metallic nanoparticles have potential applications in many technical and biological fields (drug delivery, cancer diagnostics, catalysis, etc. ). − In order to prevent metallic nanoparticles from oxidation and agglomeration upon thermal treatment they are encapsulated in carbon. − Metallic nanoparticles wrapped in carbon layers can retain the intrinsic properties of metals on the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

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Carbon States in Carbon-Encapsulated Nickel Nanoparticles Studied by Means of X-ray Absorption, Emission, and Photoelectron Spectroscopies

et al. 2011

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Electronic structure of nickel nanoparticles encapsulated in carbon was characterized by photoelectron, X-ray absorption, and X-ray emission spectroscopies. Experimental spectra are compared with the density of states calculated in the frame of the density functional theory.The carbon shell of Ni nanoparticles has been found to be multilayer graphene with significant (about 6%) amount of Stone-Wales defects. Results of the experiments evidence protection of the metallic nanoparticles from the environmental degradation by providing a barrier against oxidation at least for two years. Exposure in air for 2 years leads to oxidation only of the carbon shell of Ni@C nanoparticles with coverage of functional groups.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon States in Carbon-Encapsulated Nickel Nanoparticles Studied by Means of X-ray Absorption, Emission, and Photoelectron Spectroscopies

et al. 2011

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“…The preparation technology of nanocomposites was described in detail in [4,5]. The formation of Fe@C nanocomposites can be presented as follows.…”

Section: Features Of the Experiments And Calculation Of The Electronicmentioning

confidence: 99%

X-ray spectroscopy of carbon-encapsulated iron nanoparticles

et al. 2015

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The composition and electronic structure of carbon-encapsulated iron nanoparticles Fe@C are examined by X-ray photoelectron, X-ray absorption, and resonant emission spectroscopy methods. It is found that the core in the Fe@C nanocomposite is in the metallic state with an impurity of iron carbide, which is preserved for two years. Experimentally measured spectra are compared to the calculations of the electronic structure of graphene performed at the density functional theory level. It is revealed that the Fe@C carbon shell can be presented as several graphene layers with Stone-Wales topological defects. Based on the measurements of X-ray resonant emission Kα spectra of carbon, the energy band dispersion of the carbon shell of Fe@C nanoparticles is investigated and the manifestation of Stone-Wales defects in them is shown.

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“…Iron nanoparticles capsulated into carbon were obtained by contactless levitation melting in a high-frequency field and by the evaporation of melted metal in the flow of an inert gas with hydrocarbons [1,13,14]. The size of resulting Fe@C particles was about 10 nm.…”

Section: Features Of the Experiments And Calculationmentioning

confidence: 99%

Electronic structure and resonant X-ray emission spectra of carbon shells of iron nanoparticles

et al. 2013

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The electronic structure of carbon shells of carbon encapsulated iron nanoparticles carbon encapsulated Fe@C has been studied by X-ray resonant emission and X-ray absorption spectroscopy. The recorded spectra have been compared to the density functional calculations of the electronic structure of graphene. It has been shown that an Fe@C carbon shell can be represented in the form of several graphene layers with Stone-Wales defects. The dispersion of energy bands of Fe@C has been examined using the measured C Kα resonant X-ray emission spectra.

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The synthesis, structure, and properties of carbon-containing nanocomposites based on nickel, palladium, and iron

Cited by 23 publications

References 16 publications

Carbon States in Carbon-Encapsulated Nickel Nanoparticles Studied by Means of X-ray Absorption, Emission, and Photoelectron Spectroscopies

Carbon States in Carbon-Encapsulated Nickel Nanoparticles Studied by Means of X-ray Absorption, Emission, and Photoelectron Spectroscopies

X-ray spectroscopy of carbon-encapsulated iron nanoparticles

Electronic structure and resonant X-ray emission spectra of carbon shells of iron nanoparticles

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