Title :
NO2 gas sensing characteristics of octa(2 ethylhexyloxy)Cu-Pc films prepared by Langmuir-Blodgett method
Author :
Yim, Jun-Seok ; Kim, Young-Kwan ; Kim, Jung-Soo
Author_Institution :
Hong Ik Univ., Seoul, South Korea
Abstract :
It is well known that the metallo-phthalocyanines (MPcs) are sensitive to toxic gaseous molecules such as NO2 and are also chemically and thermally stable. Therefore, lots of MPcs have been studied for the potential chemical sensor for NO2 gas using quartz crystal microbalance (QCM) or electrical conductivity. In this study, thin films of octa (2-ethylhexyloxy)copper-phthalocyanine were prepared by Langmuir-Blodgett method and characterized by using UV/Vis absorption spectroscopy and ellipsometry. Optimal transfer condition of LB films was investigated and preliminary results of current-voltage (I-V) characteristics of these films exposed to NO2 gas as a function of film thickness, temperature and NO2 concentration were discussed
Keywords :
Langmuir-Blodgett films; ellipsometry; gas sensors; microbalances; nitrogen compounds; organic semiconductors; semiconductor thin films; ultraviolet spectroscopy; visible spectroscopy; Langmuir-Blodgett method; NO2; UV/Vis absorption spectroscopy; current-voltage characteristics; ellipsometry; film thickness; gas concentration; gas sensing characteristics; metallo-phthalocyanines; octa(2 ethylhexyloxy)Cu-Pc films; quartz crystal microbalance; toxic gaseous molecules; Chemical sensors; Conductivity; Electromagnetic wave absorption; Ellipsometry; Magnetic materials; Photonic crystals; Spectroscopy; Temperature; Toxic chemicals; Transistors;
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.1997.616633
