Влияние размерного эффекта на проводимость наночастиц NiO плазмохимического синтеза

Abstract

Nickel oxide nanoparticles were obtained by condensation from a vacuum arc discharge plasma and subsequent deposition on a substrate at various temperatures (300–700 K). The samples were characterized using X-ray diffraction and transmission electron microscopy. The formation of a phase of stoichiometric NiO, whose crystallite size increases with increasing substrate temperature, is confirmed. Electrophysical properties are investigated by measuring DC and AC conductivity and dielectric properties as a function of temperature. The frequency and temperature dependences of the dielectric permittivity and conductivity in alternating current demonstrate the behavior characteristic of dielectrics with a predominance of charge carriers.