Self-Actuating Redox Assay Detection for Power-Free Field Sensing
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Solution Overview
Problem
Existing detection technologies face challenges in achieving accurate, selective, sensitive, and rapid analysis of target substances, particularly in field applications, with limitations in multiplexing, enzyme reliance, and the need for external power sources.
Innovation Solution
Self-actuating signal-producing (SASP) detection devices and methods that utilize biocatalytic reactions to generate signals without relying on the target analyte as a substrate, using enzymes and electrodes to produce RF, electrical, or photo-electronic signals, suitable for field applications without external power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional detection methods are used, then detection accuracy can be achieved, but the devices require external power sources and are not suitable for field applications
Solution Approach 1:
The detection device uses self-actuating signal-producing reagents that generate their own signal without requiring external power sources. The reagents contain both the signal-producing component and the energy source, allowing the device to function autonomously in field applications.
Solution Approach 2:
The patent combines the signal-producing reagent, energy source, and detection mechanism into a single integrated device. This merging eliminates the need for separate power sources and external instrumentation, enabling portable field use.
2Measurement precision
If high sensitivity detection is implemented, then low concentration targets can be detected, but background noise increases and selectivity decreases
Solution Approach 1:
The patent uses specific binding agents (antibodies, aptamers, or receptors) as intermediaries that selectively bind to target analytes before the signal-producing reagent interacts with them. This selective binding ensures that only target molecules trigger the signal, maintaining high selectivity even at low concentrations.
Solution Approach 2:
The signal-producing reagent is designed to activate only at specific locations where target analytes are bound, creating localized signal generation. This prevents background noise from non-specific areas and maintains signal-to-noise ratio.
3Productivity
If rapid detection is achieved, then analysis time is reduced, but detection accuracy and sensitivity may be compromised
Solution Approach 1:
The detection device performs preliminary binding of the target analyte to specific binding agents before signal generation. This pre-concentration step ensures that even low concentrations of target are captured and concentrated at the detection site, maintaining sensitivity while enabling rapid readout.
Solution Approach 2:
The self-actuating signal-producing reagents continuously generate signal as long as target analyte is present, eliminating the need for separate measurement steps. This continuous signal generation maintains accuracy while reducing total analysis time.
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
These devices provide high selectivity, sensitivity, and rapid analysis with low background noise, enabling accurate detection of target analytes in various environments, including field settings, without the need for external power.
Implementation Method 1
a biocatalytic reaction capable of generating electrons and/or electric potential
Implementation Method 2
the biocatalytic reaction capable of generating electrons and/or electric potential
Implementation Method 3
an electrode or other means for detecting said electric potential
Data Source
AI summary
An assay system is provided of great sensitivity and portability where the presence of a specific target in a sample, as well as its concentration (qualification and quantification) is detected by reason of a potential or voltage in a closed circuit, built up a redox reaction. The reaction is produced by binding a capture moiety to an enzymatic redox reaction partner, allowing the capture moiety to bind to any target in the sample, and washing any such bound target. The bound target, if not immobilized, may be immobilized through use of a second capture moiety. Substrate for the enzyme is then added. The action of the enzyme upon the substrate frees electrons, creating a potential across an anode and cathode which may be separated by a membrane.