SENSORIZED DEVICE FOR THE ANALYSIS OF A FLUID IN REAL TIME USING ACOUSTIC WAVES

A sensorized device (100) for detecting analytes within a fluid comprising a piezoelectric substrate (105) having an outer surface (105'), at least one R-SAW emitting interdigital transducer (111) arranged on the outer surface (105') and arranged to emit a surface acoustic wave of the Rayleigh type, also-called R-SAW, in response to an electrical input signal, said R-SAW being emitted along a first emission direction x, and at least one SH-SAW emitting interdigital transducer (112) arranged on the outer surface (105') and arranged to emit a surface acoustic wave of the shear-horizontal type, also-called SH-SAW, in response to an electrical input signal, said SH-SAW being emitted along a second emission direction y. In particular, the piezoelectric substrate (105) is made of a material selected from 64° Y-cut lithium niobate and 163° Y-cut lithium niobate, in such a way that the piezoelectric substrate (105) supports as its main mode surface acoustic waves of the shear-horizontal type, the main mode being defined as the surface acoustic wave exhibiting greater electromechanical coupling on the piezoelectric substrate (105). Furthermore, the first emission direction x and the second emission direction y have a relative angle a in such a way that 80° < α < 100°.