Title :
Functional design of semiconductor gas sensors for measurement of smell and freshness
Author :
Egashira, Makoto
Author_Institution :
Dept. of Mater. Sci. & Eng., Nagasaki Univ., Japan
Abstract :
Some important results of our research on semiconductor gas/odor sensors are reviewed. Our research is focused on observation of nonlinear I-V characteristics of sensors, elucidation of influences of reactivity and diffusivity of both objective and oxygen gases in a porous sensing layer, optimization of catalytic activity of sensing materials to objective gases, control of oxygen readsorption, and so on. Based on the important findings obtained, sensors are designed for fish smells such as trimethylamine and dimethylamine to measure freshness of fish
Keywords :
Schottky barriers; adsorption; catalysis; food processing industry; gas sensors; O2; SnO2; catalytic activity; diffusivity; dimethylamine; fish freshness; fish smells; functional design; nonlinear I-V characteristics; objective gases; odor sensors; oxygen gases; oxygen readsorption; porous sensing layer; reactivity; semiconductor gas sensors; Conducting materials; Design engineering; Gas detectors; Gases; Grain boundaries; Marine animals; Semiconductor materials; Sensor phenomena and characterization; Varistors; Voltage;
Conference_Titel :
Solid State Sensors and Actuators, 1997. TRANSDUCERS '97 Chicago., 1997 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-3829-4
DOI :
10.1109/SENSOR.1997.635496
