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In this paper, a mobile electronic nose (E-nose) based on novel hybrid carbon nanotube-SnO2 gas sensors is described. The instrument combines new feature extraction techniques including integral and primary derivative, which leads to higher classification performance comparing with the classical features ( Delta R and Delta R/R0). The results show that doping of carbon nanotube (CNT) improves the...
Humidity strongly effects the sensitivity of odor sensors. It is therefore a major problem in the use of electronic nose (E-nose) for most applications including detecting human body odor from armpits, where humidity at the armpits can varies to a large extent due to various human activities. In this paper, we propose both hardware and software approaches to correct the humidity effect. The E-nose...
The interactions between various single-walled carbon nanotubes (SWNTs) and water molecules have been studied using first principles calculations and molecular dynamics (MD) simulations. The SWNTs were modeled by varying the diameter ranging from the chiral vector (6,0) to (9,0), and by modifying the terminal ends with hydroxyl (-OH) and carboxyl (-COOH) functional groups for the nanotubes having...
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