SAW Sensor Fluid Analysis Using Acoustic Turbulence
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Solution Overview
Problem
Existing fluid analysis methods for detecting specific analytes are limited by the use of optical sensors, which are difficult to integrate on small chips, and lack effective methodologies using surface acoustic waves to introduce turbulence and enhance detection efficiency.
Innovation Solution
A method utilizing nanostructured devices with SAW sensors, including a substrate with piezoelectric portions, interdigital transducers, and reflector electrodes, to detect analytes by generating surface acoustic waves and introducing turbulence with an auxiliary transducer, allowing for precise analysis and increased molecular bond creation between analytes and probes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors are used for fluid analysis, then detection accuracy is maintained, but device size and integration complexity increase significantly
Solution Approach 1:
The patent replaces optical sensors with surface acoustic wave (SAW) sensors that use mechanical vibrations instead of light. The SAW sensor comprises a piezoelectric substrate with interdigital transducers that generate acoustic waves to detect analytes, eliminating the need for complex optical systems while maintaining detection capability
Solution Approach 2:
The patent changes the detection parameter from optical properties to acoustic properties. By using surface acoustic waves with frequencies in the MHz range, the system achieves analyte detection through mechanical vibrations and mass changes on the sensor surface, providing a simpler integration path for miniaturized devices
2Productivity
If surface acoustic waves are used without turbulence, then device simplicity is maintained, but detection efficiency and molecular bond creation decrease
Solution Approach 1:
The patent introduces a second interdigital transducer that generates surface acoustic waves specifically designed to create turbulence in the fluid. This turbulence enhances mixing and increases the probability of molecular bonds between analytes and probes, directly improving detection efficiency through mechanical vibration
Solution Approach 2:
The patent employs periodic acoustic waves at specific frequencies to create controlled turbulence. By applying surface acoustic waves at optimized frequencies, the system periodically disturbs the fluid to enhance mixing and molecular interaction, improving detection efficiency through rhythmic mechanical action
3Ease of operation
If traditional laboratory analysis equipment is used, then analysis accuracy is maintained, but portability and operational simplicity are reduced
Solution Approach 1:
The patent segments the complex laboratory analysis system into a miniaturized chip-scale device. The SAW sensor integrates multiple functions (wave generation, detection, fluid handling) onto a single substrate, creating a portable unit that performs laboratory-quality analysis without requiring large equipment
Solution Approach 2:
The patent enables the device to perform automated analysis with minimal operator intervention. The SAW sensor system automatically generates acoustic waves, detects analyte presence through frequency shifts, and provides results without requiring complex manual operations, simplifying the user experience while maintaining accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables highly sensitive and precise fluid analysis with a significantly smaller footprint compared to traditional instruments, facilitating portability and reducing costs while enhancing detection efficiency by introducing turbulence.
Implementation Method 1
a substrate having an outer surface comprising at least one piezoelectric portion; at least one emitting interdigital transducer arranged on the piezoelectric portion of the outer surface, said emitting interdigital transducer arranged to emit a surface acoustic wave in response to an input electric signal
Implementation Method 2
at least one reflector electrode arranged on the outer surface, said reflector electrode arranged to reflect the acoustic wave towards said emitting interdigital transducer
Implementation Method 3
the application of the aforementioned acoustic wave biosensors surface is still a pioneering field of research and in this case there are no examples of effective methodologies
Data Source
AI summary
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 (115′), at least one emitting interdigital transducer (111) and at least one reflector electrode (112). There are then the steps of adsorbing a plurality of probe molecules, sending n input electric signals, having respective frequencies fi, and subsequent transmission of at least one surface acoustic wave, reflecting by said or each reflector electrode (112) of said or each surface acoustic wave emitted, identifying at least one resonance frequency fr, conveying said fluid on said outer surface (115′), removal of said fluid by said outer surface (115′), verifying a possible change of value of at least one resonance frequency fr previously identified.