Tin oxide-carbon nanotube composite for NOx sensing.
Tin oxide-single wall carbon nanotube (SWCNT) nano composites are synthesized for gas sensor application. The fabrication includes deposition of porous SWCNTs on thermally oxidized SiO2 substrates followed by rheotaxial growth of Sn and thermal oxidation at 300, 400, 500, and 600 degrees C in air. The effects of oxidation temperature on morphology, microstructure, and gas sensing properties are investigated for process optimization. The tin monoxide oxidized at 400 degrees C showed the highest response at the operating temperature of 200 degrees C. Under the optimized test condition, the composite structure showed better response than both structures of SWCNTs and thin film SnO.
Department of Materials Science and Engineering and Center for NanoBioEngineering and Spintronics, Chungnam National University, Daejeon, 305-764, Republic of Korea.
Dong Mi
DM
Jang
Hyuck
H
Jung
Nguyen Duc
ND
Hoa
Dojin
D
Kim
Soon-Ku
SK
Hong
Hyojin
H
Kim
D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon; D009589:Nitrogen Oxides / Q000032:analysis*; D017971:Tin Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
D037742:Nanotubes, Carbon; D009589:Nitrogen Oxides; D017971:Tin Compounds; C045358:stannic oxide