Raman Detection Agent for Reliable Analyte Measurement
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Solution Overview
Problem
Existing diagnostic assay platforms using Raman spectroscopy face challenges with reliability and reproducibility, particularly in detecting analytes across various disease applications, due to variability in results when reading from different regions of the same reaction zone.
Innovation Solution
The method involves using a diagnostic substrate with a capture agent and a Raman detection agent comprising a Raman signal-enhancing metal nanoparticle and an affinity component to bind with the analyte, allowing for reliable and reproducible analyte detection through Surface-Enhanced Raman Spectroscopy (SERS) by exposing the sample to either the substrate or the detection agent sequentially or simultaneously, enhancing signal intensity and detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Raman spectroscopy is used for analyte detection in diagnostic assays, then sensitivity and versatility are improved, but reliability and reproducibility deteriorate due to variability in results from different regions of the same reaction zone
Solution Approach 1:
The patent applies local quality by incorporating Raman signal-enhancing metal nanoparticles specifically at the reaction zone where analyte detection occurs. This localized enhancement ensures that the SERS effect is concentrated where needed, improving signal intensity and measurement precision in the critical detection area without affecting other regions of the diagnostic substrate.
Solution Approach 2:
The patent uses Raman signal-enhancing metal nanoparticles as intermediary agents that mediate between the analyte and the detection system. These nanoparticles serve as SERS substrates that enhance the Raman signal from the analyte, enabling more reliable and reproducible detection while maintaining the versatility of the diagnostic platform.
2Measurement precision
If Surface-Enhanced Raman Spectroscopy (SERS) is used to enhance signal intensity, then detection sensitivity is improved, but device complexity increases due to the need for metal nanoparticle integration
Solution Approach 1:
The patent merges the Raman signal-enhancing metal nanoparticles with the diagnostic substrate into a single integrated component. This combination allows the SERS effect to be built-in to the diagnostic platform, improving detection sensitivity while minimizing the increase in device complexity through consolidation of functions.
Solution Approach 2:
The patent designs the diagnostic substrate to serve multiple functions: it acts as the diagnostic medium, the SERS substrate, and the carrier for the metal nanoparticles. This multi-functionality reduces device complexity by eliminating separate components while maintaining high detection sensitivity through the integrated SERS 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
This approach enables reliable and reproducible analyte detection across different regions of the diagnostic assay, improving the sensitivity and quantitation of analytes, thereby addressing the limitations of existing Raman spectroscopy-based diagnostic assays.
Implementation Method 1
Surface-Enhanced Raman spectroscopy (SERS) techniques are in development to provide excellent sensitivity through enhanced signal intensity and/or detection
Implementation Method 2
a Raman detection agent comprising a Raman signal-enhancing metal nanoparticle carrying both a Raman reporter and an affinity component for binding the analyte (or a complex formed between the analyte and the capture agent)
Data Source
AI summary
Methods and Raman detection agents for detecting an analyte in a sample are provided. Methods described herein may comprise steps of providing a 3D diagnostic substrate presenting a capture agent for the analyte or an analyte complex; exposing the sample to the substrate and to a Raman detection agent, allowing analyte in the sample to bind to the capture agent of the diagnostic substrate and an affinity component of the Raman detection agent; and detecting the Raman detection agent bound to the 3D diagnostic substrate by Raman spectroscopy, thereby detecting the presence of the analyte in the sample. Raman detection agents described herein may comprise a Raman signal-enhancing metal nanoparticle carrying both a Raman reporter and an affinity component for binding to the analyte or the complex formed between the analyte and the capture agent on the 3D diagnostic substrate.