Abstract
This paper endeavors to answer an important question posed during the fabrication of vapor sensors based on multiwall carbon nanotubes (MWCNTs): How do the preparation and measurement conditions influence the sensor response in real-life situations? A satisfactory answer could be given in view of the effects produced by the surface functionalization of MWCNTs and various solvent vapors. To this end, this case study was designed upon modified-MWCNT-networks (Ns) with alkyl diol (EG) and alkyl diamine (EDA, HDA) treatments, and the sensor responses of these networks were examined in respect of the following vapors: water and different solvents from the groups of paraffinic hydrocarbon, aromatic hydrocarbon, halohydrocarbon, ether, ketone, aldehyde, ester, and nitrogen containing compounds, sulphur containing compounds, alcohols and acids. In addition, an applied sensor based on MWCNT (HDA)-N was evaluated by measuring various alcoholic beverages and vinegar.
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