Quartz crystal microbalance determination of vapors of volatile organic compounds on carbon nanotubes under batch conditions |
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| Authors: | Yu Kh Shogenov T A Kuchmenko S S Grazhulene A N Red’kin |
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| Institution: | 1.Faculty of Ecology and Chemical Technology,Voronezh State Technological Academy,Voronezh,Russia;2.Institute of Microelectronics Technology and High-Purity Materials,Russian Academy of Sciences,Chernogolovka, Moscow oblast,Russia |
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| Abstract: | Specific features of the sorption of vapors of monoatomic aliphatic alcohols and aromatic compounds on coatings formed from
carbon nanotubes of various genesis studied by the method of piezoelectric micro weighing are considered. The morphology of
the coatings is considered in dependence on the conditions of synthesis and aftertreatment of carbon nanotubes. A new method
of the processing of signals from an array piezoelectric sensors is proposed; it allows an increase in the selectivity of
the determination of volatile organic compounds in an equilibrium gas phase by 2–2.5 times. The advantages of the application
of carbon nanotubes as sorption coatings in comparison to the standard polymeric sorbents for piezoelectric micro weighing
are demonstrated: the detection limit decreases by 4–15 times and the duration of measurement by 5–55 times. |
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