Sensory device based on pyrolyzed polyacrylonitrile for carbon dioxide test

Modern electronics is characterized by rapid technological progress which leads to reduction of the sizes of objects according to the exponential law and the development of nanotechnologies that deal with nanometer size objects. Modern solid-state electronics is actively using new materials, including nanomaterials. The development of science, the needs of production and consumption require the creation of new devices based on new principles and new technologies with quantum effects. These factors make scientists actively search for new materials possessing the necessary characteristics and demonstrating the new effects, which will form the basis of modern solid state electronics devices. The studies of the interaction between carbon dioxide molecules and the surface of one- and two-layer pyrolized polyacrylonitrile (PPAN) for five locations of the molecules over the different atomic hexagons of PPAN let reveal that the interaction of a molecule of carbon dioxide is implemented only for the case of two-layer PPAN when the orientation of the molecules at the center of a hexagon or middle connection S-S. The results demonstrate the possibility of using PPAN as part of the electronic sensory devices for fixing of the availability and identification of carbon dioxide in the atmosphere, and the established fact of implementation of physical adsorption determines the reusability of this sensor. Touch response can be recorded by changing the potential in the system when PPAN interaction, even with a single molecule that shows extraordinary sensitivity of such a sensor system based on PPAN. Sensory properties of PPAN in the presence of carbon dioxide in the gas atmosphere can be used for the manufacture of fire-based sensor PPAN.