Presented here are the preliminary results concerning a cadmium sulfide(CdS) thin films investigations in a Surface Acoustic Wave dual-delay line systems. The CdS films has been prepared by an open-boat, physical vapor deposition (PVD) process using chemically prepared CdS powder as starting material. The thicknesses of the CdS films was about 115nm and 268nm. These CdS films have been investigated from the point of view their sensitivity towards: nitrogen dioxide, sulphur dioxide, ammonia and H2S gases with different concentrations in dry air.
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