SERS Substrate with MIM Nanostructures for Pathogen Detection
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Solution Overview
Problem
Current pathogen detection methods are limited by sensitivity, require expensive reagents, and involve complex equipment and lengthy processes, leading to high false negatives and delayed results, particularly in point-of-care settings.
Innovation Solution
A surface-enhanced Raman spectroscopy (SERS) substrate with metal-insulator-metal (MIM) nanostructures, fabricated using nanoimprint lithography and machine learning analysis, for rapid and label-free detection of pathogens like SARS-CoV-2, offering high sensitivity and specificity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RT-PCR assays are used for pathogen detection, then detection sensitivity is improved, but cost and complexity increase due to expensive reagents and complicated equipment requirements
Solution Approach 1:
The patent replaces complex mechanical/chemical RT-PCR systems with optical measurement systems. Instead of using thermal cyclers, enzymes, and complex reagent systems, the invention uses Raman spectroscopy to directly detect pathogen molecular vibrations, eliminating the need for expensive equipment while maintaining detection sensitivity through optical-molecular interaction
Solution Approach 2:
The patent extracts and eliminates unnecessary components from the detection system. By removing RT-PCR specific elements like primers, probes, enzymes, and thermal processing steps, the invention achieves pathogen detection through simplified optical measurement, reducing both cost and equipment complexity while preserving measurement capability
2Measurement precision
If immunoassay-based approaches are used for pathogen detection, then detection capability is improved, but time consumption increases due to lengthy processing requirements
Solution Approach 1:
The patent skips intermediate processing steps required by immunoassays such as incubation, washing, and signal development. By directly measuring Raman scattering from pathogen molecules in the sample, the invention eliminates time-consuming steps while maintaining detection capability, achieving rapid results without sacrificing measurement precision
Solution Approach 2:
The patent performs preliminary molecular identification through Raman spectroscopy before any complex processing. By obtaining spectral fingerprints of pathogen molecules directly from the sample, the system eliminates the need for subsequent immunoassay steps, reducing processing time while preserving detection accuracy
3Loss of time
If immune-chromatography strips are used for rapid pathogen detection, then processing time is reduced, but detection sensitivity deteriorates due to lower limit of detection
Solution Approach 1:
The patent changes the detection parameter from visual signal intensity (as in chromatography strips) to spectral frequency analysis. By measuring Raman shift frequencies and comparing them against reference spectral fingerprints, the system achieves both rapid processing and high sensitivity, overcoming the trade-off between speed and detection limit present in chromatography-based methods
4Reliability
If conventional pathogen detection methods are used, then detection is achieved, but false negative results increase due to sensitivity limitations
Solution Approach 1:
The patent introduces Raman scattering as an intermediary measurement mechanism that directly probes pathogen molecular structure. Instead of relying on indirect immune-based signals that can fail, the system uses optical-molecular interaction to directly detect pathogen presence, eliminating false negatives by providing direct molecular evidence rather than indirect inference
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
Enables rapid, cost-efficient, and accurate detection of pathogens with minimal sample preparation, providing results within a short timeframe and reducing false negatives, suitable for point-of-care applications.
Implementation Method 1
The plurality of MIM nanostructures can exhibit plasmonic activity in response to electromagnetic excitations having a frequency corresponding to a plasmon resonance frequency of the plurality of MIM nanostructures
Implementation Method 2
A surface-enhanced Raman spectroscopy (SERS) substrate with metal-insulator-metal (MIM) nanostructures, fabricated using nanoimprint lithography and machine learning analysis, for rapid and label-free detection of pathogens like SARS-CoV-2
Data Source
AI summary
A surface-enhanced Raman spectroscopy (SERS) substrate, including a substrate base; and a plurality of metal insulator metal (MIM) nanostructures disposed on the substrate base, wherein an average distance between the plurality of MIM nanostructures disposed on the substrate base is from about 1 nm to about 10 nm, and a method of detecting at least one pathogen using the SERS substrate.