Colorimetric Sensor with Molecularly Imprinted Polymer for Rapid Analyte Detection
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Solution Overview
Problem
Current methods for detecting chemical substances like gamma-butyrolactone (GBL), gamma-hydroxybutyrate (GHB), and ketamine in beverages are reactive, time-consuming, and require expensive equipment, lacking in discreetness and proactive detection capabilities.
Innovation Solution
A colorimetric sensor with a metal layer, nanostructures, and a molecularly imprinted polymer layer that changes color upon contact with the target analyte, integrated into a fluid receptacle or straw, allowing for rapid and discreet detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical reagent composition is used for proactive testing, then detection capability is improved, but time consumption increases
Solution Approach 1:
The patent employs colorimetric detection where the sensor changes color upon binding to the target analyte. This visual color change provides immediate detection results without requiring time-consuming instrumental analysis, thus resolving the contradiction between reliable detection and time consumption.
Solution Approach 2:
The patent replaces complex mechanical/instrumental detection systems (like liquid chromatography-tandem mass spectrometry) with a simple optical detection system based on color changes. This substitution maintains detection reliability while dramatically reducing time consumption and equipment requirements.
2Measurement precision
If expensive equipment is used for detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses a disposable sensor that can be discarded after a single use. This eliminates the need for expensive, complex, and reusable equipment while maintaining detection accuracy through the specialized molecularly imprinted polymer layer that provides selective binding.
Solution Approach 2:
The patent extracts the essential detection function from complex instrumental systems and isolates it into a simple colorimetric sensor. By taking out only the necessary binding and detection components (metal layer, nanostructures, and MIP layer), the system achieves accurate detection without the complexity of full analytical instrumentation.
3Reliability
If chemical reagent composition is used for testing, then detection capability is improved, but discreetness deteriorates
Solution Approach 1:
The patent merges the detection function directly into the beverage container or serving utensil itself. By integrating the sensor into the cup, glass, or straw, the testing becomes seamless and discreet, eliminating the need for separate testing procedures that would draw attention.
Solution Approach 2:
The sensor automatically detects the presence of analytes when the beverage comes into contact with it during normal serving or consumption. This self-service detection requires no active user intervention or separate testing steps, maintaining complete discreetness while providing reliable detection.
4Measurement precision
If molecularly imprinted polymer layer is added, then selectivity is improved, but manufacturing complexity increases
Solution Approach 1:
The molecularly imprinted polymer layer is pre-formed with specific binding sites for the target analyte during the sensor manufacturing process. This preliminary creation of selective binding sites ensures high selectivity is built into the sensor structure itself, eliminating the need for complex post-manufacturing calibration or adjustment procedures.
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
Enables rapid, discreet, and cost-effective detection of chemical substances in beverages, providing a proactive means to identify threats before consumption.
Implementation Method 1
Surface plasmon resonance sensor comprising metal coated nanostructures
Data Source
AI summary
A colorimetric sensor for detecting an analyte of interest that includes a metal layer disposed upon a substrate, a plurality of nanostructures, and a corresponding plurality of metal deposits spaced apart from the metal layer. The metal layer defines a plurality of holes, each nanostructure includes a first portion disposed within a respective hole, and each metal deposit is disposed upon a second portion of a respective nanostructure. The sensor also includes a molecularly imprinted polymer layer that may cover the metal layer, the nanostructures, and/or the metal deposits. The molecularly imprinted polymer layer defines a cavity shaped to receive the analyte of interest, and the sensor is configured such that, when an analyte contacts the molecularly imprinted polymer layer and becomes disposed within the cavity, an optical property of at least a portion of the sensor changes thereby to cause a detectable color change in and/or from the sensor.