AIE Fluorescent Nanoparticles for Quench-Free Lateral Flow Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluorescent labels for lateral flow assays suffer from low sensitivity, narrow detection range, and fluorescence quenching effects, limiting their effectiveness in quantitative analysis and point-of-care diagnostics.
Innovation Solution
Development of aggregation-induced emission (AIE) fluorescent nanoparticles with high quantum yield and tunable emission wavelengths, encapsulated in polymer matrices to prevent quenching, allowing for wide detection ranges and stable performance in various environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fluorescent labels are used in lateral flow assays, then the detection can be performed with simple equipment, but the sensitivity and detection range are limited due to fluorescence quenching effects
Solution Approach 1:
The patent introduces AIE-active luminophores as an intermediary material that replaces conventional fluorescent labels. These AIE luminophores exhibit the opposite effect of traditional fluorophores: instead of quenching at high concentrations, they enhance emission when aggregated. This intermediary material resolves the contradiction by eliminating fluorescence quenching while maintaining ease of use in lateral flow assays
Solution Approach 2:
The patent changes the fundamental photophysical parameter of the labeling material from conventional fluorescent dyes to AIE-active luminophores. This parameter change transforms the concentration-dependent behavior from quenching to enhanced emission, enabling high sensitivity detection without the harmful quenching effect that limits conventional fluorescent labels
2Reliability
If quantum dots are used to achieve high quantum yields and photostability, then fluorescence properties are improved, but toxicity and complicated synthesis procedures arise
Solution Approach 1:
The patent replaces expensive, complex-to-synthesize quantum dots with simpler, more accessible AIE luminophore-based nanoparticles. These AIE nanoparticles can be synthesized through straightforward polymerization methods using common monomers, eliminating the need for complex quantum dot synthesis while maintaining photostability and reducing toxicity concerns
Solution Approach 2:
The patent creates composite nanoparticle systems where AIE luminophores are encapsulated within polymer matrices (such as polyacrylonitrile, polyacrylic acid, or polymethyl methacrylate). This composite structure protects the luminophores while enabling simple synthesis through polymerization, avoiding the complexity of quantum dot shell formation and stabilization
3Reliability
If direct immunolabeling method is used, then species cross-reactivity is minimized, but detection sensitivity is lower compared to indirect method
Solution Approach 1:
The patent combines the advantages of both direct and indirect immunolabeling methods by using AIE nanoparticle-conjugated primary antibodies. The high emission intensity of AIE nanoparticles provides signal amplification similar to indirect methods, while the direct conjugation to primary antibodies maintains species specificity. This merging approach achieves both high sensitivity and high specificity simultaneously
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 AIE nanoparticles enhance detection sensitivity and enable quantitative analysis with a broader detection range, maintaining stability and sensitivity over time, suitable for point-of-care diagnostics and multiplexed assays.
Implementation Method 1
AIE-active luminophores, which exhibit aggregation-induced emission, are used in the fluorescent nanoparticles. These luminophores show enhanced emission in aggregated states, preventing the self-quenching that plagues conventional fluorophores.
Implementation Method 2
The fluorescent nanoparticles exhibit high solid-state absolute quantum yield and tunable emission color, maintaining stable fluorescence signals over time without quenching effects.
Implementation Method 3
The invention uses polymerizable monomers such as styrene, methyl methacrylate, and acrylic acid to create polymer matrices that encapsulate the AIE luminophores, stabilizing the nanoparticles and controlling their emission properties.
Data Source
AI summary
Provided are fluorescent nanoparticles and their conjugates and methods of using the same for in vivo and in vitro diagnostics and other applications. In some embodiments, provided are fluorescent nanoparticles with high solid-state absolute quantum yield. In some embodiments, provided are methods of manufacturing such nanoparticles. Nanoparticles may comprise monomers, such as styrene, and fluorophores, such as AlEgen™ Bright Green.