Archives of Acoustics, 34, 3, pp. 245–352, 2009

Adsorption properties of porous Langmuir-Blodgett layer used in SAW sensor for vapors of some chlorinated hydrocarbons

Institute of Fundamental Technological Research, Polish Academy of Sciences

The porous Langmuir-Blodgett film has been fabricated from
an equimolar mixture of 5-[[1,3-dioxo-3- [4- (1-oxooctadecyl) phenyl] propyl]
amino] - 1,3 - benzenedicarboxylic acid (DA) with cetylamine (CA) and
subsequently removing of cetylamine after a layer deposition. This film has been
investigated as the sensing layer of the surface acoustic waves (SAW) sensor of
vapors of some chlorinated hydrocarbons in air. From the experimental results
the values of the number of adsorbed molecules of chlorinated hydrocarbons per
surface of sensing layer, NM/A, for this porous Langmuir-Blodgett layer has been
calculated. An attempt to explain the observed differences in the adsorption of
chlorinated hydrocarbons has been undertaken.
Keywords: monomolecular Langmuir-Blodgett organic layers; chlorinated hydrocarbons; surface acoustic wave sensors
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