Photonic Colorimetric Sensor Using MIP Layers for Visible Analyte Detection
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Solution Overview
Problem
Existing methods for detecting colorless and odorless incapacitating agents in beverages are reactive, time-consuming, and require expensive equipment or discreet but awkward testing, lacking proactive and discreet detection solutions.
Innovation Solution
A colorimetric sensor using lamellar photonic materials with alternating polymer layers, including molecularly imprinted polymers, that change color upon exposure to target analytes, integrated into fluid receptacles or straws, utilizing refractive index changes and chromophore indicators for visible detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical reagent composition is used for proactive testing, then detection capability is improved, but testing time increases and discretion is reduced
Solution Approach 1:
The patent employs colorimetric sensors that undergo visible color changes when exposed to target analytes. The photonic crystal structure changes its optical properties upon analyte binding, producing an immediate visual signal that eliminates waiting time for results while maintaining high detection capability through specific molecular recognition.
Solution Approach 2:
The invention replaces complex mechanical testing equipment (such as liquid chromatography-tandem mass spectrometry) with a simple optical detection system. The colorimetric response provides immediate visual feedback without requiring expensive instrumentation or lengthy analysis procedures, thus reducing testing time while preserving reliability.
2Reliability
If chemical reagent composition is used for proactive testing, then detection capability is improved, but device complexity increases
Solution Approach 1:
The patent uses intrinsic color changes of photonic crystal sensors upon analyte binding, eliminating the need for complex chemical reagent compositions. The structural color change provides direct detection capability without requiring additional chemical additives or complex reaction systems, thus reducing device complexity while maintaining detection reliability.
Solution Approach 2:
The photonic crystal sensor performs self-detection through its inherent optical properties that change upon analyte binding. The sensor automatically produces a visible colorimetric signal without requiring external reagents, complex processing steps, or specialized equipment, thereby simplifying the overall device while preserving detection capability.
3Measurement precision
If molecularly imprinted polymers are used in photonic material, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines molecularly imprinted polymers with photonic crystal structures to create a composite material that integrates high-specificity analyte recognition with enhanced optical properties. The MIP provides precise molecular recognition while the photonic crystal amplifies the detection signal through structural color changes, achieving high measurement precision without requiring extremely tight manufacturing tolerances on individual components.
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
Provides rapid, discreet, and cost-effective detection of target analytes with visible color changes, enabling proactive identification of substances like GBL, GHB, and ketamine in beverages without specialized equipment.
Implementation Method 1
a refractive property of the photonic material changes, causing a detectable color change in the sensor
Implementation Method 2
The first polymer layer that is molecularly imprinted may contain a chromophore-containing polymer such as poly(urea-naphthalimide), poly(thiourea-naphthalimide), poly(styrene-urea-naphthalimide) or poly(styrene-thiourea-naphthalimide)
Data Source
AI summary
A colorimetric sensor for detecting an analyte of interest in a fluid sample includes a photonic structure comprising a first receptor, wherein the photonic structure may be configured such that, when an analyte contacts the first receptor within the photonic structure, a refractive property of the photonic structure changes thereby to cause a detectable color change in the photonic structure. The first receptor may comprise an optical absorber indicator, wherein a second receptor is part of a structure of the optical absorber indicator, such that, when the analyte contacts the second receptor, the analyte causes a photo-induced electron transfer to induce a color change of the optical absorber indicator.