Chemical Bonding Specifics of Hybrid Metal-Polymer Nanocomposites Based on Cobalt Nanoparticles and Polyacrylonitrile: X-Ray Spectroscopy Investigation

Abstract

The cobalt-containing polyacrylonitrile (PAN) films were fabricated using IR-pyrolysis under low vacuum conditions. It was found that Co/PAN films have a porous structure and cobalt nanoparticles with size 0.1-0.2 μm embedded into PAN matrix. Besides, as a result of interaction between PAN matrix and Co ions unsaturation in the polymer backbone is observed caused by the transformation of the C≡N triple bond to a C=N double bond. At the same time formation of Co-N bond is observed.

Choice of technological conditions for synthesis of sensing materials based on polyacrylonitrile on flexible substrates

“…Advantage of PAN-based material is the possibility of obtaining films with functional properties and there is no need to use complex technological equipment. Thin cadmium-containing PAN films (h = 0.09 µm -0.17 µm) with a resistance of 7·10 8 to 3·10 10 Ω were obtained by pyrolysis method. It has been found that the temperature dependence of the resistance of the films has an exponential character.…”

“…The technology of fabrication gas sensitive PAN films that does not require high-tech equipment and the ability to exhibit gas-sensing properties at room temperatures opens the prospect of creating flexible sensors. The gas-sensitive metal-containing PAN thin films have been fabricated [6] that are sensors for detecting to CO, NO2, Cl2, NH3, H2S [7][8][9][10].…”