Papers by Author: S. Krutovertsev

Abstract: Comparative study of WO3 thick film sensing features obtained by two different methods to ozone content in the air is presented. The thin films of 0.1-0.3 μ were obtained at evaporation temperature of 1100°C and pressure in chamber 1,33x10-8 bar. Films were formed by thick film technology from WO3 based paste. The films sensitivity to ozone is determined by working temperature of sensors. At the same time the characteristic stability depends on time and magnitude of temperature impulse. It was shown, that measurement sensor samples have high sensitivity to 70 ppb of ozone in the air.

Abstract: Constraction and characteristics of sorption polymeric relative humidity sensors, sorption SiOx microhumidity sensors, and condensation type (dew point) sensors are compared. The characteristics of the sensors are examined in dew point range from -80 to +20oC. An integrated multifunctional humidity sensor, for measurements in wide humidity range at different conditions is developed. The sensors are intended for use in various branches of industry, and in scientific researches.

Abstract: The physicochemical properties and optical characteristics changes of novel synthesized polyphthalocyanines (PPc), containing Zn, Cu, Mn, Fe, Pb were investigated in different gas medium. The paper studies the characteristics changes of PPc nanostructured films, which were deposited on the interdigitated test structures and on the outside of U-shaped multimode cylindrical waveguide. Sensitivity of the films to different gases, such as NH3, NOx, H2S, O2 was investigated.