For the biosensors based on electromagnetic waves, the material deposited as biosensitive element essentially determines the functioning characteristics. Ag/ZnO/ITO/glass and Ag/ZnO/SiO2/Si mesostructures were analyzed in order to use ZnO as bioactives surface. This paper presents the results obtained at the testing of metallic strip gratings, deposited on different substrates, using the electromagnetic sensor with metamaterials (MM) lens in order to prove its capability to gather the evanescent waves appeared on the edge of strips when the slits are filled with immobilized enzymes.
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