Piezoelectric Hybridization Detection via Frequency Shift
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Solution Overview
Problem
Current biological detection methods, such as fluorescence-based detection, are cumbersome, expensive, and limited in sensitivity due to the need for complex instrumentation and lack of homogeneity in marker distribution, making them unsuitable for efficient integration with electronic circuits and cost-effective manufacturing.
Innovation Solution
A semiconductor-based hybridization detecting device is developed, integrating a probe cell and electronic high-frequency circuit with a piezoelectric region, allowing for high sensitivity and low manufacturing costs through miniaturization and standard semiconductor manufacturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorescence-based detection is used, then detection capability is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the optical fluorescence detection system with a purely electronic piezoelectric detection system. The piezoelectric element directly converts mass changes on the substrate into electrical signals, eliminating the need for optical markers, light sources, and complex optical reading instrumentation while maintaining detection capability.
Solution Approach 2:
The invention extracts and eliminates the unnecessary optical components (fluorophores, light sources, optical detectors) from the detection system, retaining only the essential mass detection function through the piezoelectric element. This simplifies the overall system while preserving the core detection capability.
2Reliability
If fluorescence-based detection is used, then detection capability is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive optical detection components with a simple piezoelectric element that can be manufactured using standard semiconductor fabrication techniques. This substitution dramatically reduces manufacturing costs while maintaining detection capability through direct electrical signal generation from mass changes.
Solution Approach 2:
The invention uses a disposable or easily replaceable piezoelectric substrate that can be mass-produced at low cost. The simple structure allows for inexpensive manufacturing compared to expensive optical instruments, making the detection system more cost-effective.
3Reliability
If optical markers are introduced, then detection capability is improved, but sensitivity is limited by marker distribution homogeneity
Solution Approach 1:
The invention completely removes optical markers from the detection system. Instead of relying on fluorophore distribution, the piezoelectric element directly measures the mass of bound analytes, eliminating the sensitivity limitations imposed by marker distribution homogeneity and providing more precise measurements.
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
The device achieves high sensitivity and reliability in detecting biological materials by measuring frequency changes with a semiconductor chip, enabling the detection of small mass variations and integration into electronic circuits at reduced costs.
Implementation Method 1
the use of quartz crystal microbalance (QCM) for hybridization detection has been proposed, which avoids the need for radioisotopes or fluorophores. Quartz is one member of a family of crystals that experience the piezoelectric effect (to generate an electric potential in response to applied mechanical stress)
Implementation Method 2
A QCM measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator, wherein the resonance is disturbed by the addition or removal of a small mass
Data Source
AI summary
A hybridization detecting device, wherein a probe cell has a body of semiconductor material forming a diaphragm, a first electrode on the diaphragm, a piezoelectric region on the first electrode, a second electrode on the piezoelectric region and a detection layer on the second electrode. The body accommodates a buried cavity downwardly delimiting the diaphragm.