This article is cited in 14 papers

Spectroscopy of condensed matter

Effect of non-equilibrium synthesis conditions on structure and optical properties of amorphous carbon films

A. P. Ryaguzov^a, R. R. Nemkayeva^ab, O. I. Yukhnovets^a, N. R. Guseinov^a, S. L. Mikhailova^c, F. Bekmurat^c, A. R. Asembayeva<sup>ad

a</sup> National Nanotechnology Open Laboratory, Al-Farabi Kazakh National University, Almaty, Kazakhstan
^b Engineering Laboratory, Al-Farabi Kazakh National University, Almaty
^c Department of Solid State Physics and Nonlinear Physics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
^d Kazakh National Technical University after K. I. Satpaev

Abstract: Amorphous carbon (a-C) thin films were synthesized by non-equilibrium method of ion-plasma sputtering of graphite target in Ar atmosphere at constant value of plasma current. Studies of the local structure of the carbon films were carried out using Raman spectroscopy method. Using normal distribution for Raman spectra decomposition it was revealed that at synthesis temperatures below 150 C a peak at about 1260 cm$^{-1}$ occurred, which is characteristic for phonon density of states with $sp^{3}$-hybridized bonds. In addition, it was shown the dependence of the optical bandgap on the sizes of $sp^{2}$-site nanostructures and correlation of it with the results of X-ray photoelectron spectroscopy (XPS) in the a-C films.

Keywords: carbon film, synthesis, optical properties.

Received: 29.01.2019
Revised: 29.01.2019
Accepted: 09.04.2019

DOI: 10.21883/OS.2019.08.48037.33-19

 English version: Optics and Spectroscopy, 2019, 127:2, 251–259

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