Electrical Biomolecule Detection via Metal Dissolution
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Solution Overview
Problem
Current biomolecule detection methods, particularly in medical diagnostics and molecular biology, are often expensive, large, and reliant on optical systems, which are not convenient for point-of-care testing and can struggle with detecting small concentrations due to the need for amplification and the use of radioactivity or complex setups.
Innovation Solution
A method using enzyme-labelled detection biomolecules that catalyze metal dissolution, allowing for the measurement of electrical properties such as conductivity or resistance to detect target molecules, eliminating the need for optical systems and enabling direct and indirect detection in a smaller, more cost-effective format.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical detection methods (ELISA, fluorescence, absorption) are used to detect target molecules, then detection sensitivity and versatility are improved, but device complexity, cost, and size increase
Solution Approach 1:
The patent replaces optical detection systems with an electrical detection system. Instead of using optical sensors, light sources, and complex optical paths to detect target molecules, the invention uses electrodes to measure electrical properties (current, voltage, impedance) that change in response to target molecule binding. This substitution of optical detection with electrical detection simplifies the overall system architecture while maintaining detection sensitivity.
Solution Approach 2:
The invention extracts and eliminates the optical detection components from the assay system. By removing the need for optical units, light sources, and associated complex infrastructure, the patent creates a streamlined system that relies on electrical measurements alone, thereby reducing device complexity and cost while preserving the core detection function.
2Measurement precision
If optical systems and amplification are used to detect small concentrations of biomolecules, then detection capability is improved, but cost and device size increase
Solution Approach 1:
The patent replaces bulky optical detection systems with compact electrical detection using electrodes. The electrical measurement system requires minimal space compared to optical systems, which need light sources, lenses, and sensors. This substitution enables detection of small biomolecule concentrations in a compact device suitable for point-of-care settings.
3Measurement precision
If radioactivity is used for detection, then detection sensitivity is improved, but safety requirements and operational complexity increase
Solution Approach 1:
The patent converts the potentially harmful radioactive detection method into a safe electrical detection method. Instead of using radioactive isotopes that require special handling, shielding, and waste disposal, the invention uses electrical measurements that are inherently safe. The detection sensitivity is maintained through the use of electrodes that respond to electrical properties of the bound complexes.
4Measurement precision
If multiple electrodes and reference electrodes are used for amperometric measurements, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the functions of multiple electrodes into a single integrated electrode structure. Instead of using separate working electrodes, reference electrodes, and counter electrodes as in traditional amperometric systems, the invention employs a single electrode that performs multiple functions, thereby simplifying the device while maintaining measurement accuracy.
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 allows for qualitative and quantitative detection of biomolecules without the need for optical units, providing a more convenient, cost-effective, and efficient method for biomolecule detection, suitable for various assays including immunoassays and ELISA formats.
Implementation Method 1
whereby the target molecule is bound to an enzyme-labelled detection biomolecule and whereby the enzyme catalyses a reaction which produces a reactive species dissolving metal of the wire
Implementation Method 2
produces a reactive species dissolving metal of the wire (as defined in claim 1), thereby altering the conductivity of the wire
Implementation Method 3
measuring the conductivity or resistivity of said wire allows detecting and/or quantifying said analyte
Data Source
Figure 1
Figure 2A~2C
Figure 3~4
AI summary
The present invention relates to a method for detecting a target molecule in a sample by metal dissolution as described in the specification, said method using an electrical readout; to kits adapted for this method and to electrodes suitable for such kits and methods.