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Magnetic resonance study of carbon encapsulated Ni nanoparticles |
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| Authors: | Marta Bobrowska Janusz Typek Grzegorz Zolnierkiewicz Kamil Wardal Niko Guskos Iwona Pelech Marcin Podsiadly Urszula Narkiewicz | |
| Institution: | 1. Department of Chemistry and Environmental Engineering, Faculty of Maritime Engineering, Maritime University of Szczecin, 70-500, Szczecin, Poland 2. Institut of Physics, West Pomeranian University of Technology, 70-311, Szczecin, Poland 3. Solid State Section, Department of Physics, University of Athens, 15 784, Panepistimiopolis, Greece 4. Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, 70-322, Szczecin, Poland |
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| Abstract: | Magnetic resonance study of six samples consisting of carbon encapsulated nickel nanoparticles or carbon nanotubes ended with such nickel nanoparticles was carried out at room temperature. Samples of Ni/C were prepared by carburization of nanocrystalline nickel by ethylene (C2H4) and methane (CH4). Hydrocarbons decomposition on nickel nanoparticles was done at temperatures 500, 600 and 700°C. Magnetic resonance spectra of samples designated as CH4/500, CH4/600, CH4/700, C2H4/500, C2H4/600 and C2H4/700 were obtained by Bruker E 500 spectrometer. The integrated intensities of the resonance spectra were correlated with the carburization conditions (temperature, type of hydrocarbon) during samples preparation. A core-shell model of the investigated samples allowed rough estimation of appropriate shell sizes.  | |
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