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

ByungWook Hwang, SooChool Lee, SeongYeol Kim, Suk Yong Jung, Jae Chang Kim, Sung Man Nam, Byeong Hwang Park, Ju Hyun Kim, Duk Dong Lee & JeungSoo Huh
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...