title: A bio-inspired two-layer multiple-walled carbon nanotube-polymer composite sensor array and a bio-inspired fast-adaptive readout circuit for a portable electronic nose.
abstract: We report a fully integrated, portable, battery-operated electronic nose system comprising a bio-inspired two-layer multiple-walled carbon nanotube (MWNT)-polymer composite sensor array, a bio-inspired fast-adaptive readout circuit, and a microprocessor embedded with a pattern recognition algorithm. The two-layer MWNT-polymer composite sensor is simple to operate, and the membrane quality can be easily controlled. These two-layer membranes have improved sensitivity and stability. The fast-adaptive readout circuit responds to the sensor response, while tuning out the long-term constant background humidity, temperature, and odors. This portable electronic nose system successfully classified four complex alcohol samples 40 times for each sample; these samples were sake, sorghum liquor, medical liquor, and whisky.
authors.affiliation: Department of Materials Science and Engineering, National Chiao Tung University, Taiwan.
authors.forename: L C
authors.initials: LC
authors.lastname: Wang
authors.forename: K T
authors.initials: KT
authors.lastname: Tang
authors.forename: S W
authors.initials: SW
authors.lastname: Chiu
authors.forename: S R
authors.initials: SR
authors.lastname: Yang
authors.forename: C T
authors.initials: CT
authors.lastname: Kuo
mesh_terms: D000465:Algorithms; D040761:Biomimetic Materials; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000706:statistics & numerical data; D004867:Equipment Design; D000431:Ethanol / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000648:ultrastructure; D009812:Odorants / Q000032:analysis*; D011108:Polymers
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers; D000431:Ethanol