In this study, we reported facile sonochemical synthesis of CuS nanoparticles by using CuCl₂ and Na₂S in aqueous medium without using any organic solvent and surfactant. Structural characterization of synthesized product using X-ray diffraction study revealed the formation of hexagonal structure of CuS in covellite phase. Crystallite size of ~13 nm and ~11 nm were determined using Debye-Scherrer and Williamson-Hall methods, respectively. Field emission scanning electron microscopy micrographs revealed the particulate morphology of CuS nanostructures. The optical properties of CuS nanoparticles were investigated by ultra violet & visible (UV-V_is), photoluminescence (PL), and Fourier transform infrared spectroscopy. The band gap was calculated by Tauc's relation and found to be 3 eV. The PL spectrum showed a strong green emission at wavelength 505 nm. The electrical conductivity of CuS nanoparticles was found to be in semiconducting range, i. e. 550 S/cm. Impedance analysis of CuS nanoparticles revealed 7.55 MHz as the resonant frequency. Keywords: CuS nanoparticles, sonochemical synthesis, impedance spectroscopy, band gap, electrical conductivity.

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Дата начала обработки статистических данных - 27 января 2016 г.