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http://dx.doi.org/10.3740/MRSK.2003.13.12.796

Effect of Humidity and Operating Temperature of Polymer Sensor to Methanol Gas  

Lee, K.M. (Department of Materials Science and Metallurgy Kyungpook National University)
Hoh, Y.S. (Department of Materials Science and Metallurgy Kyungpook National University)
Jun, H.K. (Department of Materials Science and Metallurgy Kyungpook National University)
Sohn, S.O. (Department of Materials Science and Metallurgy Kyungpook National University)
Huh, J.S. (Department of Materials Science and Metallurgy Kyungpook National University)
Publication Information
Korean Journal of Materials Research / v.13, no.12, 2003 , pp. 796-800 More about this Journal
Abstract
The polypyrrole prepared with pyrrole monomer, APS and DBSA was synthesized by chemical Polymerization at $V^{\circ}C$ under atmosphere conditions. After dissolving polypyrrole powder to the chloroform including DBSA, polypyrrole film was prepared on the alumina substrate with an interdigitated electrode by using the dip-coating method. This film was soaked in methanol solvent for 1 h at room temperature and heated to $70^{\circ}C$ for 4 h in $N_2$. Initial resistance was increased with the increasing humidity and decreasing temperature. The sensitivity was increased with lower humidity and decreasing temperature. The best linearity was achieved at $25^{\circ}C$ and low humidity of 0%.
Keywords
polypyrrole gas sensor; humidity effect; absorption site;
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