Graphene Nanoelectronic Sensor for DNA Sequencing
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Solution Overview
Problem
Current diagnostic technologies for detecting viral or bacterial infections, such as Lyme disease, lack sensitivity and require significant time, expertise, and expensive equipment, making them ineffective for early detection and prone to operator-dependent variance.
Innovation Solution
An electronic biological sample analysis system using nanoelectronic circuits with sp3 hybridized Carbon scattering sites and sequencing probes that measure changes in electrical properties to detect DNA binding, allowing for sensitive and efficient identification of DNA sequences in biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic technologies (ELISA, gel electrophoresis, blood culture) are used to detect infections, then the tests can identify the presence of antibodies or pathogens, but the tests require significant time (several hours to several days), expertise, and expensive automation equipment
Solution Approach 1:
The patent replaces traditional mechanical and chemical diagnostic systems (ELISA, gel electrophoresis) with a nanoelectronic sensing system that uses carbon nanotube field-effect transistors (CNT-FETs) to directly detect DNA sequences. This substitution enables real-time electrical signal detection instead of time-consuming chemical reactions and manual analysis, achieving both high sensitivity and rapid results within minutes
Solution Approach 2:
The patent changes the detection parameter from measuring antibody presence (indirect) to directly measuring DNA sequence binding events (direct). By using CNT-FETs that transduce DNA binding into electrical conductance changes, the system achieves rapid detection without the multi-step processes required by traditional methods, reducing testing time while maintaining or improving sensitivity
2Measurement precision
If traditional diagnostic technologies are used, then the tests can detect infections, but they require significant expertise and expensive automation equipment to run properly
Solution Approach 1:
The patent replaces complex mechanical and chemical操作流程 with a simplified nanoelectronic sensing system where DNA binding events are directly transduced into electrical signals. This eliminates the need for skilled operators to perform complex manual procedures, reducing operator dependence while maintaining detection accuracy through direct physical measurement
Solution Approach 2:
The CNT-FET sensor system performs self-detection by directly transducing DNA binding events into electrical conductance changes without requiring external intervention or interpretation. The system automatically generates measurable signals from molecular binding events, eliminating the need for expert operators to interpret complex test results
3Measurement precision
If reporter molecules or molecular labels are used in diagnostic tests, then the tests can generate measurable signals, but the tests require multiple steps and specialized reagents that increase complexity and cost
Solution Approach 1:
The patent replaces chemical reporter molecules and molecular labels with a direct nanoelectronic sensing mechanism. The CNT-FETs detect DNA sequences through direct binding-induced conductance changes, eliminating the need for fluorescent labels, enzymatic reporters, or colorimetric indicators. This substitution simplifies the test procedure from multiple steps to a single direct measurement
Solution Approach 2:
The patent extracts and removes the complex reporter molecule system from the diagnostic test. By using CNT-FETs that directly transduce binding events into electrical signals, the system eliminates the need for separate reporter addition, incubation, and detection steps, reducing procedural complexity while maintaining signal detection capability
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 system provides extraordinary sensitivity and reduces the need for expensive equipment and expertise, enabling early detection of diseases like Lyme disease with improved accuracy and reduced operator dependence.
Implementation Method 1
measuring changes in electrical properties of the electronic circuit system. The changes in electrical properties are analyzed to determine the presence of binding DNA subjugates based on the changes in pH associated with such binding process
Data Source
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AI summary
A DNA sequencing and blood chemistry analysis device is provided including one or more sensor chips and one or more sample wells, wherein each sample well is configured to form a seal with one of the sensors. The one or more sensor chips may comprise Graphene transistors, and each transistor having an associated sequencing probe. The sensor chips interact with a biological sample introduced into the sample well, wherein changes in the current, transconductance, and resistance of the Graphene transistors are indicative of a DNA binding process. Based on the associated sequencing probes, the DNA sequence present in a biological sample can be identified.