Sensing properties of sodium stearate Langmuir-Blodgett films

A.I.Lepikh*, V.A.Smyntyna, V.D.Pronichkin


I.Mechnikov Odessa State University 2 Dvorianskaya str., 65100 Odesa, Ukraine
*NTC "Phonon" SDTB "Element", 29 Acad. Glushko Ave., 65104 Odesa, Ukraine

Received January 28, 1999

Sensing elements have been produced by deposition of Langmuir-Blodgett molecular films of sodium stearate (CH3(CH2)17COONa) onto glass, ceramic or piezoelectric substrates. Changes of the element ohmic resistance and capacity have been investigated in water, ammonia, benzene, isopropyl alcohol and acetic acid vapor atmospheres. The investigation results have revealed a high stability and reproducibility of these characteristics, as well as the relatively fast recovery of the sensor operation ability at room temperature.

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