Integrated Sensor Combining Electrochemical and Optical Signals
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Solution Overview
Problem
Existing electrochemical and electrical sensors face challenges in detecting low analyte concentrations due to undetectable currents and are often less specific and accurate, especially in complex matrices and environments with high interference.
Innovation Solution
An integrated sensing device that combines electrochemical, electrical, and optical signals to enhance sensitivity and selectivity for real-time analyte detection, utilizing a configuration of electrodes, bridging materials, and electronic circuits to control and measure electrochemical and electrical properties simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrochemical sensors are used to detect analyte concentrations, then detection capability is provided, but sensitivity is insufficient when analyte concentration is low because the current flowing between electrodes becomes undetectable
Solution Approach 1:
The patent combines electrochemical detection with optical detection in an integrated sensor system. The electrochemical component provides initial analyte detection through current measurement between electrodes, while the optical component (using fluorescence or absorbance) provides enhanced sensitivity for low-concentration analytes. This merging of two detection modalities resolves the contradiction by allowing the system to detect both higher concentrations via electrochemical means and lower concentrations via optical means.
2Measurement precision
If electrical sensors are used to detect analyte concentrations by detecting molecular binding-induced conductance changes, then detection is provided, but specificity and accuracy are reduced and the sensor is highly dependent on environmental conditions
Solution Approach 1:
The patent introduces an intermediary layer (such as a recognition element or functional coating) between the electrical/optical detection mechanism and the analyte. This intermediary provides specific molecular recognition capability that enhances specificity and accuracy while reducing direct dependence on environmental conditions. The intermediary layer can be designed to be selective for the target analyte, thereby filtering out environmental interferences.
3Measurement precision
If traditional electrochemical or electrical sensors are used, then simple detection is provided, but selectivity is insufficient in complex matrices with high concentration of interferences
Solution Approach 1:
The patent merges electrochemical and optical detection pathways into an integrated sensor system. The electrochemical component can provide information about electroactive species while the optical component (fluorescence or absorbance) provides complementary information about the analyte. By combining these two independent detection modalities, the system achieves enhanced selectivity in complex matrices, as interferents that affect one detection mode may not affect the other, allowing for discrimination of the target analyte.
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 integrated device achieves improved sensitivity and selectivity for detecting analytes in complex matrices, even at low concentrations, by utilizing a combination of electrochemical, electrical, and optical signals, allowing for precise detection in both liquid and gas phases.
Implementation Method 1
electrochemical sensors have been used in various chemical and medical applications to detect concentrations of biological analyte
Implementation Method 2
electrical sensors have also been used to determine analyte concentrations by detecting molecular binding-induced conductance or impedance changes in electrical materials
Data Source
AI summary
An integrated sensor is capable of detecting analytes using electrochemical (EC), electrical (E), and optical (O) signals or EC and O signals. The sensor introduces synergetic new capabilities and enhances the sensitivity and selectivity for real-time detection of an analyte in complex matrices, including the presence of high concentration of interferences in liquids and in gas phases.