title: A gas nanosensor unaffected by humidity.
abstract: 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.
authors.affiliation: Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA.
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.forename: Syed
authors.initials: S
authors.lastname: Mubeen
authors.forename: Bongyoung
authors.initials: B
authors.lastname: Yoo
authors.forename: Nosang V
authors.initials: NV
authors.lastname: Myung
authors.forename: Marc A
authors.initials: MA
authors.lastname: Deshusses
mesh_terms: 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
chemical_list: D000814:Aniline Compounds; D005740:Gases; D037742:Nanotubes, Carbon; D013451:Sulfonic Acids; C416807:polyaniline; D002164:Camphor; D000641:Ammonia