A method for the detection of analytes within a fluid, said method comprising the steps of prearranging a sensorized device (100) comprising at least one SAW sensor (110), said or each SAW sensor (110) comprising a substrate (115) having an outer surface (IIS′) comprising at least one piezoelectric portion, at least one emitting interdigital transducer (111) arranged on said piezoelectric portion of said outer surface (115′), said emitting interdigital transducer (111) arranged to emit a surface acoustic wave in response to an input electric signal, at least one reflector electrode (112) arranged on said outer surface (115′), said reflector electrode (112) arranged to reflect said acoustic wave towards said emitting interdigital transducer (111). There are then the steps of adsorbing a plurality of probe molecules on said outer surface (IIS′) of said substrate (115) and/or on said or each emitting interdigital transducer (111) and/or on said or each reflector electrode (112), sending n input electric signals, having respective frequencies fi, with i=1, to said emitting interdigital transducer (111) and subsequent transmission by said or each emitting interdigital transducer (111) of at least one surface acoustic wave, reflecting by said or each reflector electrode (112) of said or each surface acoustic wave emitted, identifying, between said n frequencies/j of said input electric signals, at least one resonance frequency fr corresponding to the generation of a surface acoustic wave having power exceeding a predetermined threshold PT, conveying said fluid on said outer surface (115) and/or on said or each emitting interdigital transducer (111) and/or on said or each reflector electrode (112), removal of said fluid by said outer surface (115) and/or by said or each emitting interdigital transducer (111) and/or by said or each reflector electrode (112), verifying a possible change of value of at least one resonance frequency fr previously identified.
SENSORIZED DEVICE FOR THE ANALYSIS OF A FLUID BY MEANS OF ACOUSTIC WAVES
CECCHINI MARCO;AGOSTINI Matteo
2020
Abstract
A method for the detection of analytes within a fluid, said method comprising the steps of prearranging a sensorized device (100) comprising at least one SAW sensor (110), said or each SAW sensor (110) comprising a substrate (115) having an outer surface (IIS′) comprising at least one piezoelectric portion, at least one emitting interdigital transducer (111) arranged on said piezoelectric portion of said outer surface (115′), said emitting interdigital transducer (111) arranged to emit a surface acoustic wave in response to an input electric signal, at least one reflector electrode (112) arranged on said outer surface (115′), said reflector electrode (112) arranged to reflect said acoustic wave towards said emitting interdigital transducer (111). There are then the steps of adsorbing a plurality of probe molecules on said outer surface (IIS′) of said substrate (115) and/or on said or each emitting interdigital transducer (111) and/or on said or each reflector electrode (112), sending n input electric signals, having respective frequencies fi, with i=1, to said emitting interdigital transducer (111) and subsequent transmission by said or each emitting interdigital transducer (111) of at least one surface acoustic wave, reflecting by said or each reflector electrode (112) of said or each surface acoustic wave emitted, identifying, between said n frequencies/j of said input electric signals, at least one resonance frequency fr corresponding to the generation of a surface acoustic wave having power exceeding a predetermined threshold PT, conveying said fluid on said outer surface (115) and/or on said or each emitting interdigital transducer (111) and/or on said or each reflector electrode (112), removal of said fluid by said outer surface (115) and/or by said or each emitting interdigital transducer (111) and/or by said or each reflector electrode (112), verifying a possible change of value of at least one resonance frequency fr previously identified.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
