Исследование фазового состава наночастиц в углеродной оболочке Ni@C методом ЯМР

Abstract

The NMR, X-ray diffraction and magnetization data of Ni@C nanoparticles (d = 8 nm) in the carbon shell (2 nm) synthesized by gas-phase method have been obtained. Analysis of the Ni61 NMR spectra obtained in the local field at T=4.2 K have shown that Ni@C nanoparticles contain phases of metallic Ni (12 %), solid solution Ni-C (8 %), and carbide Ni3C (1.5 %). According to C13 NMR in the external field at T=300 K, the shell does not contain graphene layers.