Nanomembrane Sensor for Rapid Viral Nucleic Acid Detection
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Solution Overview
Problem
Current diagnostic technologies for detecting viruses like dengue virus are time-consuming, expensive, require trained personnel, and are not suitable for field diagnostics, making them cumbersome for point-of-care applications in endemic areas.
Innovation Solution
A microfluidic sensing device with a nanomembrane-based electrokinetic sensor that detects DNA or RNA target sequences without amplification, providing a rapid, sensitive, low-cost, and portable platform for nucleic acid sensing, capable of identifying pathogen-specific nucleic acids in a field-expedient format.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic methods (virus isolation, RT-PCR, ELISA) are used, then detection accuracy is improved, but assay time increases and portability is reduced
Solution Approach 1:
The device segments the diagnostic process into distinct functional modules: sample preparation chamber, nanomembrane sensor chamber, and detection chamber. This modular segmentation allows parallel processing and eliminates time-consuming sequential steps while maintaining detection accuracy through specialized functionality in each segment.
Solution Approach 2:
The system performs preliminary sample preparation and nucleic acid extraction within the integrated microfluidic device before detection. The pre-concentration unit prepares samples in advance, and the automated sample processing occurs before the actual measurement, reducing the time required during the critical detection phase while ensuring accurate results.
2Reliability
If traditional diagnostic methods are used, then detection reliability is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The invention merges multiple complex functions (sample preparation, nucleic acid extraction, concentration, and detection) into a single integrated nanomembrane-based device. This consolidation reduces the number of separate components and interfaces that require management, thereby reducing operational complexity while maintaining reliable detection through the synergistic integration of functions.
Solution Approach 2:
The device incorporates automated sample processing and pre-concentration capabilities that operate without manual intervention. The microfluidic system self-regulates flow and the nanomembrane sensor automatically detects targets, reducing the need for skilled personnel while ensuring consistent, reliable results through standardized automated procedures.
3Measurement precision
If conventional diagnostic systems are deployed, then measurement precision is improved, but cost and resource requirements increase
Solution Approach 1:
The device employs a disposable microfluidic chip with an integrated nanomembrane sensor that can be manufactured at low cost using standard microfabrication techniques. The chip is designed for single-use to eliminate the need for expensive cleaning and calibration equipment, reducing overall system cost while maintaining precise detection through the specialized nanomembrane structure.
Solution Approach 2:
The system replaces complex mechanical amplification and detection mechanisms with an electrochemical nanomembrane sensor that provides direct electrical signals. This substitution eliminates the need for expensive optical systems, thermocyclers, and mechanical actuators, significantly reducing manufacturing costs while maintaining high detection precision through the sensitive nanomembrane transducer.
4Measurement precision
If traditional diagnostic platforms are used, then detection sensitivity is improved, but portability and ease of operation are reduced
Solution Approach 1:
The device is designed as a universal platform that can detect multiple viral targets using the same nanomembrane sensor architecture. By incorporating multiple probes on the nanomembrane, the system achieves high detection sensitivity for various pathogens without requiring separate specialized devices, thereby simplifying operation through a single multi-functional instrument.
Solution Approach 2:
The invention transitions from bulk-phase detection to nanoscale surface-based detection using the nanomembrane. This dimensional change from three-dimensional bulk processing to two-dimensional surface interaction increases detection sensitivity by concentrating targets at the sensor interface, while the miniaturized form factor enhances portability and simplifies operation in field settings.
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 platform enables rapid, accurate, and reliable detection of viral nucleic acids, reducing assay time and cost, improving sensitivity and stability, and facilitating point-of-care diagnostics without the need for lab facilities or trained personnel.
Implementation Method 1
detecting a change in electrical potential across the nanomembrane, wherein the change in electrical potential is related to the target biomolecule binding to the probe
Data Source
AI summary
Disclosed are methods, compositions, and devices for an integrated, heterogeneous ion-exchange membrane-based plastic microfluidic biochip platform that can be used to detect multiple diagnostic markers present in real samples. Its various components can be easily integrated in a modular fashion for different applications. Automated control allows sequential and dynamic activation of different components on the chip. The integrated platform consists of three units and is designed to execute the following functions: (i) separation of the target biomolecules from the real sample, (ii) localizing and concentrating the targeted molecules at a specific location in the microfluidic chip, and (iii) detection of the targeted molecules using hybridization/docking events against a complementary ssDNA oligoprobe sequence or a specific antibody.