By using a modified method of solid-phase pyrolysis of metal-phthalocyanines, we have synthesized ferromagnetic Ni nanoparticles in different carbon structures: amorphous carbon plates, multiwall carbon nanotubes, carbon fibers, and graphitized capsules. The composition, structure and morphology of prepared composite materials have been studied by energy dispersive X-ray microanalysis, scanning and transmission electron microscopy, and X-ray diffraction technique. It has been found that the sizes of nickel nanoparticles (10–500 nm) and the type of carbon structures strongly depend on the pyrolysis conditions. By using the X-band ferromagnetic resonance measurements, we have revealed features of the temperature dependence of resonance spectra of single-domain and multi-domain Ni nanoparticles in Ni/C composites.
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This work was supported by the grants of the International Innovative Nanotechnology Center (ININC) CIS No.10881, ANSEF No. PS-CONDMATEX-1199 and Republic of Armenia No. 65. We are grateful to T. K. Khachatryan for assistance in the measurements.
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Manukyan, A.S., Mirzakhanyan, A.A., Badalyan, G.R. et al. Nickel nanoparticles in carbon structures prepared by solid-phase pyrolysis of nickel-phthalocyanine. J Nanopart Res 14, 982 (2012). https://doi.org/10.1007/s11051-012-0982-6
- Solid-phase pyrolysis
- Nickel nanoparticles
- Carbon nanostructures
- Magnetic properties