Optode Sensor Microparticle Interference Suppression
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Solution Overview
Problem
Optical detection of analytes is often marred by background physical interferences such as sample color, intrinsic fluorescence, or turbidity, which can hinder the accurate detection of optical changes in optode sensors.
Innovation Solution
Incorporating a plurality of microparticles, such as Teflon or TiO2 nanoparticles, within the optode sensor or its selectively-permeable membrane to suppress background physical interference by filtering out or reducing the impact of such interferences during detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical detection is used without interference suppression, then the detection system remains simple, but background physical interferences (sample color, intrinsic fluorescence, turbidity) mar the detection accuracy
Solution Approach 1:
The patent introduces an interference suppression layer as an intermediary component between the sample and the optode sensor. This layer contains microparticles (such as TiO2, SiO2, ZrO2, or Teflon) that act as a mediator to scatter and reflect background light, preventing it from reaching the optode and causing interference. The microparticles serve as a physical barrier that selectively blocks harmful light while allowing the detection of analyte-induced optical changes.
Solution Approach 2:
The sensor structure employs composite materials by combining the optode layer with an interference suppression layer containing dispersed microparticles in a transparent matrix material. This composite structure integrates the optical detection functionality of the optode with the light-scattering properties of the microparticle-containing layer, creating a multi-functional sensor that simultaneously detects analytes and suppresses background interferences.
2Reliability
If microparticles are added to suppress background interference, then detection accuracy improves, but the device complexity increases due to additional components and layers
Solution Approach 1:
The patent merges the interference suppression function with the sensor structure by integrating the microparticle-containing layer as an inherent part of the sensor assembly. Rather than using separate external filters or shields, the suppression layer is combined with the optode substrate or housing, creating a unified structure where multiple functions (detection and interference suppression) are accomplished within a single integrated device.
Solution Approach 2:
The microparticles in the interference suppression layer utilize optical scattering and reflection properties to alter the path and intensity of background light. The particles create optical effects that change the apparent color or intensity of interfering light, effectively filtering it out before it reaches the optode sensor, thereby improving detection reliability without requiring complex electronic filtering systems.
3Measurement precision
If no interference suppression is used, then the sensor structure remains simple, but background physical interferences hinder accurate detection of optical changes
Solution Approach 1:
The patent modifies the optical parameters of the sensor system by introducing a layer with specific light-scattering properties. The microparticles are selected and sized to optimize scattering of background light wavelengths while maintaining transparency or appropriate response to the analyte detection wavelengths. This parameter-based approach allows tuning of the suppression effect by adjusting particle size, material, and concentration during manufacturing.
Solution Approach 2:
The interference suppression layer can be implemented as a porous or particulate composite material where microparticles are dispersed in a transparent matrix. This porous structure allows the layer to be fabricated using techniques such as dip-coating, spray-coating, or infiltration, where the porous matrix is formed first and then filled with microparticles, simplifying the manufacturing process compared to creating dense homogeneous layers.
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 use of microparticles effectively reduces background interference, allowing for more accurate and reliable detection of optical changes indicative of analyte presence, enhancing the sensitivity and dynamic range of optode sensors.
Implementation Method 1
Incorporating a plurality of microparticles, such as Teflon or TiO2 nanoparticles, within the optode sensor or its selectively-permeable membrane to suppress background physical interference by filtering out or reducing the impact of such interferences during detection
Data Source
AI summary
One aspect of the present disclosure relates to an analyte sensor device. The analyte sensor device can include an optode layer that undergoes an optical change in the presence of an analyte. The analyte sensor device can also include a selectively-permeable membrane encapsulating the optode layer to form a stable membrane that that minimizes fouling of the analyte sensor device. The analyte sensor device can also include a plurality of microparticles that suppress a background physical interference on a detection of the optical change of the optode layer.