Nucleophilic Indicator Sensor Arrays for Electrophile Detection
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Solution Overview
Problem
Existing colorimetric sensor arrays face limitations in detecting electrophilic analytes such as aldehydes, ketones, and organophosphates with high sensitivity and selectivity, particularly due to the instability of indicators and limited shelf-life, and the sol-gel technique not being suitable for all indicators.
Innovation Solution
A colorimetric sensor array comprising nucleophilic indicators immobilized in various host materials, including sol-gel matrices, to enhance sensitivity and shelf-life, with a method of detecting analytes by analyzing spectral responses in the ultraviolet range, allowing for the detection of volatile organic compounds, cancer biomarkers, and other electrophilic molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional colorimetric indicators are used in sensor arrays, then the array can detect analytes, but the indicators exhibit instability and limited shelf-life
Solution Approach 1:
The patent introduces host materials as intermediary matrices to immobilize the colorimetric indicators. These host materials protect the indicators from degradation while maintaining their sensing functionality, thereby extending shelf-life and improving reliability without compromising detection capability.
Solution Approach 2:
The patent modifies the physical and chemical environment of the indicators by embedding them in host materials with specific properties (porosity, hydrophobicity, mechanical strength). This changes the stability parameters of the indicators, enabling them to maintain functionality longer while resisting degradation from environmental factors.
2Reliability
If sol-gel technique is used to immobilize indicators, then the array gains improved stability, but the technique is not suitable for all indicators
Solution Approach 1:
The patent develops a family of host materials with varying compositions and properties that can accommodate different types of colorimetric indicators. This universal platform approach allows the same immobilization strategy to work across multiple indicator types, expanding adaptability while maintaining the stability benefits of immobilization.
Solution Approach 2:
The patent tailors the local properties of host materials to match specific indicator requirements. Different host materials are designed with specific porosity, hydrophobicity, and chemical compatibility to optimize performance for particular indicator types, thereby solving the compatibility issue while maintaining overall versatility.
3Measurement precision
If multiple different host materials are used for different indicators, then the array achieves optimal sensitivity and extended shelf-life, but the manufacturing complexity increases
Solution Approach 1:
The patent divides the sensor array into discrete sensing elements, each consisting of an indicator-immobilized in a host material. This segmentation allows independent optimization of each element while maintaining modular assembly, reducing overall manufacturing complexity despite the diversity of materials used.
Solution Approach 2:
The patent pre-characterizes and pre-optimizes the relationships between indicator types and host materials before array assembly. This preliminary work establishes standardized protocols for material selection and assembly procedures, simplifying the actual manufacturing process while maintaining optimal sensitivity and shelf-life performance.
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 solution provides improved sensitivity and selectivity for detecting electrophilic analytes, including formaldehyde and organophosphates, with the ability to discriminate between different analytes, and extends the operational life of the sensor arrays.
Implementation Method 1
nucleophilic indicators that have a distinct spectral response to at least one distinct analyte... Both indicators have a distinct spectral response to this analyte
Data Source
AI summary
Sensors arrays that include indicators arranged in a pattern on a substrate. The indicators include nucleophilic indicators. In some examples, the sensor arrays with multiple nucleophilic indicators provide superior detection and identification of microorganisms, cancer biomarkers, formaldehyde, organophosphates, and aldehydes.