Nanocomposite ECL Immunosensor for Trace Shrimp Tropomyosin
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biosensors and immunosensors have low sensitivity in detecting trace amounts of tropomyosin, a heat-stable allergen found in marine food, which poses a risk for individuals with food allergies, as even small amounts can cause severe reactions.
Innovation Solution
A nanocomposite film comprising carbon nanohorns, Nafion perfluorinated resin solution, and iron oxide-palladium nanoparticles is used to create an electrochemiluminescence immunosensor that enhances detection sensitivity by immobilizing antibodies on a screen-printed electrode, allowing for the detection of tropomyosin in the range of 100 ng/mL to 1 fg/mL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional biosensors are used for tropomyosin detection, then the detection can be performed, but the sensitivity is low and cannot detect trace amounts
Solution Approach 1:
The patent employs a composite nanomaterial consisting of carbon nanohorns, Nafion perfluorinated resin, and Fe3O4@Pd magnetic nanoparticles. This composite structure synergistically combines the high surface area of carbon nanohorns for antibody immobilization, the stability and selectivity of Nafion resin, and the magnetic properties of Fe3O4@Pd nanoparticles for enhanced signal detection and separation, thereby achieving ultra-sensitive detection of trace tropomyosin
Solution Approach 2:
The patent functionalizes specific regions of the carbon nanohorns with carboxyl groups to create localized high-density antibody binding sites. The Nafion resin is applied as a thin film coating on the electrode surface to provide localized stability and selectivity, while Fe3O4@Pd nanoparticles are distributed at specific locations to enhance magnetic separation and detection sensitivity, optimizing each region for its specific function
2Measurement precision
If existing immunosensors are used, then tropomyosin detection is possible, but they cannot detect trace amounts below 1 fg/mL with high specificity
Solution Approach 1:
The patent optimizes multiple parameters including the concentration of carbon nanohorns (0.1-1.0 mg/mL), Nafion resin (0.1-1.0%), and Fe3O4@Pd nanoparticles (0.1-1.0%) in the composite film. The antibody immobilization conditions, electrochemical deposition parameters, and magnetic separation fields are systematically adjusted to achieve maximum detection sensitivity and specificity for trace tropomyosin at concentrations below 1 fg/mL
3Measurement precision
If magnetic beads functionalized with carboxyl groups are used, then antibody immobilization is achieved, but the detection sensitivity remains low
Solution Approach 1:
The patent merges multiple functional components into a single integrated nanocomposite film: carbon nanohorns provide high surface area for antibody immobilization, Nafion resin provides stability and selectivity, and Fe3O4@Pd nanoparticles provide magnetic separation capability and signal enhancement. This consolidation of functions into one composite material achieves high detection sensitivity without requiring multiple separate processing steps or complex device assembly
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 immunosensor demonstrates high specificity and repeatability in detecting tropomyosin, capable of identifying trace amounts as low as less than 1 fg/mL, making it effective for monitoring in food products with distinguished accuracy.
Implementation Method 1
The carbon nanohorns are dispersed in the Nafion perfluorinated resin solution, thereby getting oxidized
Implementation Method 2
An antibody may be entrapped on the film via electrostatic interaction and physical adsorption
Implementation Method 3
An antibody may be entrapped on the film via electrostatic interaction and physical adsorption
Implementation Method 4
A redox reaction of electron transfer takes place between the modified electrode's surface and [Ru(bpy)3]2+/TPrA ECL system
Implementation Method 5
A redox reaction of electron transfer takes place between the modified electrode's surface and [Ru(bpy)3]2+/TPrA ECL system
Implementation Method 6
The polymeric solution is further stabilized by magnetic nanoparticles
Data Source
AI summary
The present application discloses an electrochemiluminescence immunosensor. The immunosensor includes an electrode functionalized by a nanocomposite film. The film further includes carbon nanohorns dispersed in Nafion® perfluorinated resin solution. The polymeric solution is further stabilized by magnetic nanoparticles. The immunosensor is a Point of care (POC)-based. The immunosensor is configured to work in the range from 100 ng/mL to 1 fg/mL, and has tendency to detect even traces of the tropomyosin. The immunosensor is capable to detect traces even less than 1 fg/mL, hence having high specificity for Tro-Ag detection in food products with distinguished repeatability.