A gas nanosensor unaffected by humidity.
The fabrication of a gas nanosensor for detecting ammonia gas in air that is unaffected by humidity is demonstrated. On functionalizing single-walled carbon nanotube (SWNT) networks with a precise amount of camphorsulfonic-acid-doped polyaniline (PANI(CSA)), the opposite electrical resistance responses of the CSA-doped PANI and SWNTs to humid air effectively canceled each other, thereby eliminating any effects of humidity during sensing experiments. The approach should be widely applicable for eliminating undesirable interferences for gas nanosensors.
Zhang
Ting
T
Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA.
Mubeen
Syed
S
Yoo
Bongyoung
B
Myung
Nosang V
NV
Deshusses
Marc A
MA
D000641:Ammonia / Q000032:analysis*; D000814:Aniline Compounds / Q000737:chemistry; D002164:Camphor / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D005740:Gases / Q000032:analysis*; D006813:Humidity; D018625:Microscopy, Atomic Force; D037742:Nanotubes, Carbon; D013451:Sulfonic Acids / Q000737:chemistry; D013696:Temperature
D000814:Aniline Compounds; D005740:Gases; D037742:Nanotubes, Carbon; D013451:Sulfonic Acids; C416807:polyaniline; D002164:Camphor; D000641:Ammonia