IR Spectroscopic and Electrophysical Studies of Adsorptive and Electronic Interactions on the Surface of GaSb(ZnTe) Semi-conductors, Sensors Materials

To find innovative materials for the sensors, direct (piezoquartz microweighing) as well as IR spectroscopic and electrophysical studies were conducted on the adsorption of the gases, the components of the surrounding and process media (NH3, CO). The investigation was performed with fine powders and nanofilms of the GaSb – ZnTe system binary (GaSb, ZnTe) and multicomponent ((GaSb)х (ZnTe)1-х) semiconductors.Based on the analysis of the experimental dependence of adsorption, IR spectra and electrical conductivity changes nature under adsorption conditions, the conclusion was made that the electrical conductivity has mainly chemical activated nature and donor-acceptor pattern at the temperatures higher than 313, 323К.Several laws explaining the mechanisms of adsorption and electronic interactions were specified, including the compliance of the state diagrams “adsorption value - composition” and “electrical conductivity change value - composition” used to find the most active towards NH3 and CO components of GaSb-ZnTe system, the materials of the sensors for the stated gases micro-impurities.