Archives of Acoustics, 31, 4(S), pp. 47-52, 2006

Ultrasonic chemical sensor with organic monomolecular layer

Andrzej Balcerzak
Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa
Poland

Feliks Rejmund
Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa
Poland

Piotr Gutkiewicz
Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa
Poland

Bogusław Zienkiewicz
Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa
Poland

G. Zhavnerko
Institute of Chemistry of New Materials, Belarus National Academy of Sciences, Staroborisovsky Trakt 36, Minsk 220141
Belarus

In this work a structure of a ultrasonic chemical sensor with organic monomolecular layer
as well as introductory measurement with the help of a set-up constructed in IFTR PAS are
presented. Chemical composition of this layer is an equimolar mixture of 5-[[1,3-dioxo-3- [4-
(1-oxooctadecyl) phenyl] propyl] amino] – 1,3 – benzenedicarboxylic acid (DA) and cetylamine
(CA). The thickness of this layer is equal to dimension of one molecule. The sensor
layer was deposited on one channel of the bi-channel sensor delay line (made from lithium
niobiate) by means of the Langmuir–Blodgett method. The chemical sensitivity of this sensor
to some mixtures of air with vapor of volatile organic compounds has been investigated.
Keywords: ultrasonic chemical sensor, Langmuir–Blodgett layers, air-organic vapor mixtures, volatile organic compounds.
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