Chemical sensors ozone

Korotcenkov G, Cho BK (2011) Chemical sensor selection and application guide. In Korotcenkov G (ed) Chemictil sensors comprehensive sensor technologies, vol 6, 8ensors application. Momentum Press, New York, pp 281-348 Korotcenkov G, Cho BK (2012) Ozone measuring what can limit the application of 8nOj-based gas sensors 8ens Actuators B 161 28-44... 

Ozone can be determined by its reaction with an adsorbed layer of the dye rhodamine B with a silica gel. Another reaction frequently used in chemical sensors is the reaction of oxygen or hydrogen peroxide with luminol (Fig. 2.21). In combination with enzymatic reactions, highly sensitive and extremely selective sensors can be manufactured. Examples are given in Chap. 8. 

Takada, T. (1988) Ozone detection by 1020 thin film gas sensor, in Chemical Sensor Technology, vol. 2 (ed. T. Seiyama), Elsevier, Amsterdam, pp. 

Several studies of phthalocyanines in the presence of strong oxidants, such as chlorine, ozone, and nitrogen dioxide, attribute the primary electronic sensor response to the Sc term (2) where the strong chemical oxidant gasses accept an electron as in (3)-(5) [38, 99, 105-125],... 

Several challenges remain for the ultimate practical use of these sensors. The response time of the solid state sensors are short (seconds) for initial sensing, but recovery times range from minutes to hours at room temperature. The stability of the sensor to drift associated with accumulation of fixed charge at interfaces, as well as the high sensitivity to ubiquitous urban pollutants ozone and N02 are problematic. All MPc OTFTs show some response to moisture, and conductivity is also temperature sensitive so that humidity and temperature compensation are essential. On a basic research level, the detailed characterization of charge trapping states, electronic structure, and the interactions with analytes is not yet fully understood on a quantitative theoretical basis. The time response of sensor initiation and recovery is also not understood in a detailed manner. In spite of these limitations, the intrinsic chemical stability of MPc compounds and their compatibility with microsensor array fabrication make these candidate OTFTs for further research and development. 

The earliest observations of the chemical composition of the middle atmosphere were performed primarily by balloon-borne (stratosphere) and rocket-borne (mesosphere) instrumentation. In recent decades, however, systematic observations have been made by space-borne sensors, and information on chemical processes in the upper troposphere and lower stratosphere has been provided through chemical measurements made from aircraft platforms (e.g., from high-altitude aircraft such as the ER-2, the WB-57 and the Geofysika). Measurements from ground stations, combined with satellite observations, have provided accurate estimates of long-term ozone trends in the different regions of the world. 

Boulmani, R., Bendahan, M., Lambert-Mauriat, C., Gillet, M. and Aguir, K. (2007) Correlation between rf-sputtering parameters and W03 sensor response towards ozone. Sensors and Actuators B-Chemical 125,622-7. 

Industrial Applications Chemical mechanical polish-ing inks adhesives ozone sensor chemical warfare agent detergents coloring fabrics ... 

---