P2.7.5 Sensing Properties of Nano Tin Oxide Gas Sensors for the Detection of NO2 of ppb Level

14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany
P2.7 Nanostructured Metal Oxide-based Sensors
B. Hwang, S. Lee, S. Kim, S. Jung, J. Kim - Department of Chemical Engineering, Kyungpook National University (Republic of Korea), S. Nam - HKC, sucho-gu (Republic of Korea), B. Park, J. Kim - Agency for Defense Development (Republic of Korea), D. Lee - School of Electrical Engineering and Computer Science, Kyungpook National University (Republic of Korea), J. Huh - Department of Materials Science and Metallurgy, Kyungpook National University (Republic of Korea)
1617 - 1618


Sensing behaviors of tin oxide (SnO2)-based gas sensors prepared with various nanomaterials such as nanoparticles, nanochains, flower-like nanoparticles and nanowires were investigated for the detection of a very low concentration of NO2 (ppb level). Various SnO2nanomaterials were prepared by the precipitation and thermal evaporation methods. A SnO2 thick film gas sensor fabricated by screen printing method showed a sensor response of about 20%. On the other hands, tin oxide nanowires (TNW) gas sensor synthesized by the thermal evaporation method showed a very high sensor response in the detection of a low concentration of NO2 at 0.1 ppm.