Title :
NO2 gas detection characteristics of CuTBP (copper-tetra-tert-butylphthalocyanine) chemiresistor device made by LB technique
Author :
Lee, Chang-Hee ; Koo, Ja-Ryong ; Kim, Tae Wan ; Kim, Jung-Soo
Author_Institution :
Hongik Univ., Seoul, South Korea
Abstract :
We investigated air/200 ppm NO2 gas detection characteristics of CuTBP (Copper-tetra-tert-butylphthalocyanine) chemiresistor devices. The CuTBP films were made by Langmuir Blodgett (LB) techniques. Sensitivity, response time, recovery time, and reproducibility of the devices were measured by current-voltage characteristics. To increase sensitivity, interdigital electrode was used. It was found that a conductance G increases monotonically as the number of interdigital electrode N increases. And the sensitivity and reproducibility are stable. As far as the current is concerned, the current when N=25 is greater than that when N=1 by 70 or so. It indicates that the number of interdigital electrode affects the current, sensitivity and stability. We have also investigated applicability of the CuTBP chemiresistor device as a gas detector
Keywords :
Langmuir-Blodgett films; copper compounds; gas sensors; nitrogen compounds; organic compounds; resistors; CuTBP; Langmuir Blodgett film; NO2; NO2 gas detection; chemiresistor device; conductance; copper-tetra-tert-butylphthalocyanine; current-voltage characteristics; interdigital electrode; recovery time; reproducibility; response time; sensitivity; Current measurement; Delay; Electrodes; Fingers; Gas detectors; Gases; Morphology; Reproducibility of results; Time factors; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-2651-2
DOI :
10.1109/ICPADM.1997.616625
