The paper presents a resistance structures with sensor layers based on nanostructures elaborated on the base of TiO₂ and ZnO. The structures were tested concerning their sensitivities to the effects of nitrogen dioxide in the atmosphere of synthetic air. The TiO₂ and ZnO nanostructures played the role of sensor layers. Investigations have proved that the elaborated resistance structures with TiO₂ and ZnO layers are sensitive to the presence of NO2 in the atmosphere of synthetic air. The resistance of the structure amounted to about 20 in the case of ZnO structures and to about 200 in the case of TiO₂ structures. The investigations confirmed that resistance structures with ZnO and TiO₂, exposed to the effect of nitrogen dioxide in the atmosphere of synthetic air changes their resistances relatively fast. This indicates that such structures might be practically applied in sensors of nitrogen dioxide ensuring a short time of response.

The possibilities of producing waveguide structures in glass using the ion-exchange technique are discussed. The modeling of particular sequences of the technological process with respect to planar and strip waveguide structures as well as refraction profile measurement results for these waveguides are presented. An exemplary application of this technique in the construction of planar sensors is also presented. © 1997 Society of Photo-Optical Instrumentation Engineers.