Toward the nanoscopic "electronic nose": hydrogen vs carbon monoxide discrimination with an array of individual metal oxide nano- and mesowire sensors.
The array of chemiresistors made of individual pristine SnO2, surface doped (Ni)-SnO2 nanowires, and TiO2 and In2O3 mesoscopic whiskers was fabricated on a Si/SiO2 wafer. Their conductance was measured under pulses of H2 and CO reducing gases in oxygen as background gas. The nanostructures were shown to be n-type semiconductors possessing high sensitivity to the target gases. Following the "electronic nose" concept, correlation analysis of response of three-chemiresistor array is shown to be sufficient to discriminate between H2 and CO signals.
Sysoev
Victor V
VV
Department of Physics, Saratov State Technical University, Saratov 410054, Russia.
Button
Bradly K
BK
Wepsiec
Kelly
K
Dmitriev
Serghei
S
Kolmakov
Andrei
A
D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D002245:Carbon Dioxide / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004581:Electronics / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis; D006859:Hydrogen / Q000032:analysis*; D008839:Microelectrodes; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012666:Semiconductors; D012680:Sensitivity and Specificity; D017971:Tin Compounds / Q000737:chemistry*; D014159:Transducers
D005740:Gases; D017971:Tin Compounds; D002245:Carbon Dioxide; D006859:Hydrogen; C045358:stannic oxide