On-line Magazine 'Sensors & Transducers' (S&T e-Digest)
(ISSN 1726- 5479)
Vol. 39, Issue 1, January 2004, pp. 106-111
Lanthanide Doping Bis[octakis(octyloxy)phthalocyaninato] Complexes Based Langmuir-Blodgett Films
for NO2 Gas Sensors Application
Yadong Jiang1, Dan Xie2,
1School of Optoelectronic Information, University of Electronic Science and Technology of China,
Chengdu, 610054 P.R.China
2Institute of Microelectronics, Tsinghua University, Beijing 100084, P. R. China
Phone: ++86-28-83202616, e-mail: email@example.com
Received: 16 December 2003 /Accepted: 14 January 2004 /Published: 18 January 2004
Abstract: A new series of sandwich-like lanthanide doping bis[2,3,9,10,16,17,23,24-octakis(octyloxy)phthalocyaninato] complexes Ln[Pc*]2 (Pc*=Pc(OC8H17)8, Ln=Sm, Pr, Er) were used as NO2 gas-sensing materials is described in the article. The gas-sensing films of Ln[Pc*]2 were prepared by Langmuir-Blodgett (LB) technique and the NO2 gas-sensing properties of Ln[Pc*]2 LB films were studied. The sensitive properties of Ln[Pc*]2 LB films to NO2 gas was monitored by the change of conductivity during gas exposure. Therein, Sm[Pc*]2 has the best sensitivity and responsivity to NO2 gas. The detecting range is from 0~100ppm, and the response and recovery time of 11-layer Sm[Pc*]2 LB film to 20ppm NO2 at room temperature is 16 s and 80 s, respectively. The thinner the film, the faster the response and recovery become. Recovery time in air is longer than that in pure N2.
Keywords: Gas sensor, NO2 gas, Bis[phthalocyaninato] complexes, Langmuir-Blodgett film
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