Polymer-Supported IR Sensor for On-Site Analyte Detection
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Solution Overview
Problem
Current infrared sensing technologies, such as Fourier-transform infrared spectroscopy, are bulky, expensive, and impractical for on-site monitoring and analysis, particularly in fields like farming where frequent soil monitoring over large areas is needed, as they require laboratory settings and generate unnecessary data for full spectral analysis.
Innovation Solution
A polymer-supported infrared sensing apparatus with a waveguide, a sensing layer comprising a metal and polymer layer, and a detector system that uses attenuated total reflection to detect specific analyte molecules, allowing for on-site monitoring without the need for bulky equipment, utilizing a narrow band IR light source and a simple IR detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Fourier-transform infrared spectroscopy apparatus is used for infrared sensing, then measurement precision is improved, but device complexity increases and portability deteriorates
Solution Approach 1:
The patent extracts only the essential sensing function from the complex FTIR spectrometer by using a simple IR detector with a narrowband filter tuned to a specific analyte's absorption wavelength, eliminating the need for complex spectral scanning and processing while maintaining detection precision for targeted analytes
Solution Approach 2:
The invention changes the detection approach from broad spectral analysis to narrowband detection by using a filtered IR detector that monitors only specific wavelengths corresponding to analyte absorption, simplifying the measurement system while preserving precision for the target parameter
2Measurement precision
If Fourier-transform infrared spectroscopy apparatus is used for infrared sensing, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts only the essential sensing function from the complex FTIR spectrometer by using a simple IR detector with a narrowband filter tuned to a specific analyte's absorption wavelength, eliminating the need for complex spectral scanning and processing while maintaining detection precision for targeted analytes
Solution Approach 2:
The invention employs inexpensive, simple components such as uncooled IR detectors and narrowband filters that can be easily manufactured and deployed in the field, replacing expensive laboratory equipment with affordable field-deployable sensors
3Measurement precision
If full spectral analysis is performed, then measurement precision is improved, but loss of information increases due to unnecessary data
Solution Approach 1:
The patent extracts only the essential sensing function from the complex FTIR spectrometer by using a simple IR detector with a narrowband filter tuned to a specific analyte's absorption wavelength, eliminating the need for complex spectral scanning and processing while maintaining detection precision for targeted analytes
Solution Approach 2:
The invention performs only the partial action necessary for detecting specific analytes by monitoring narrow wavelength bands corresponding to their absorption features, rather than performing complete spectral analysis, thus obtaining sufficient information for the intended application without generating unnecessary data
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 cost-effective, scalable, and sensitive on-site monitoring of analytes by enhancing the IR signal and improving selectivity through surface plasmon resonance, allowing for efficient detection of specific analytes in various environments, including soil and groundwater.
Implementation Method 1
enhancing the IR signal and improving selectivity through surface plasmon resonance
Implementation Method 2
The transmission of MIR radiation does not occur through the sample in the case of liquid or solid samples, since the MIR radiation is absorbed into the sample matrix
Implementation Method 3
Molecular structures with a change in dipole moment during molecular vibration can absorb energy from the mid-infrared (MIR) region
Implementation Method 4
The frequency of the absorbed radiation corresponds to the vibrational frequency of the molecular bond that undergoes asymmetric stretching or bending motions
Data Source
AI summary
A sensor apparatus includes a waveguide, a sensing layer, a light source for emitting light onto the waveguide, and a detector for detecting a wavelength transmitted from the waveguide. The sensing layer may include a polymer layer which may come into intimate contact with a sample matrix of the environment.