Sensor Receptor Layer Composite for Tunable Sensitivity
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Solution Overview
Problem
Existing sensors face challenges in optimizing both sensitivity and selectivity due to the limitations of single base materials, which require simultaneous optimization of physical and chemical properties, but effective methods for achieving this have not been established.
Innovation Solution
A sensor with a receptor layer composed of a base material and particulate material composite, where the particulate material has different physical and chemical properties, allowing for adjustable Young's modulus and functional groups to enhance sensitivity and selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single base material is used for the receptor layer, then the chemical selectivity can be optimized through functional group design, but the sensitivity is limited by the fixed physical properties of the base material
Solution Approach 1:
The patent uses a composite receptor layer consisting of a base material and particulate material. The base material provides chemical selectivity through functional groups, while the particulate material adjusts physical properties such as Young's modulus. This composite structure allows independent optimization of both sensitivity (through physical property adjustment) and selectivity (through chemical functional group design), resolving the contradiction between fixed physical properties and adjustable performance.
2Measurement precision
If the Young's modulus of the receptor layer is increased to improve sensitivity, then the deflection signal increases, but the chemical selectivity and stability of functional groups may be compromised
Solution Approach 1:
The patent divides the receptor layer into two functional segments: the base material that maintains chemical selectivity and functional group stability, and the particulate material that adjusts physical properties like Young's modulus. This segmentation allows the base material to preserve functional group integrity while the particulate material independently controls sensitivity, preventing compromise between reliability and measurement precision.
3Measurement precision
If the receptor layer thickness is decreased to improve sensitivity by shifting optimal Young's modulus to larger values, then the signal increases, but the amount of functional groups available for selective adsorption is reduced
Solution Approach 1:
The patent changes the physical parameters of the receptor layer by incorporating particulate material with different mechanical properties. This allows the optimal Young's modulus to be achieved through material composition rather than solely through thickness reduction, thereby maintaining functional group quantity while improving sensitivity. The particulate material enables parameter adjustment without the trade-off of reduced functional group availability.
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
This approach enables high sensitivity and selectivity by varying the Young's modulus and adding particulate materials with specific functional groups, allowing for broad adjustment of sensitivity and selective detection of analytes without modifying the base material's structure or coating conditions.
Implementation Method 1
a receptor layer of a composite containing a base material and a particulate material
Implementation Method 2
the sensor detects a variation in a physical parameter caused on adsorption of a molecule of an analyte to the receptor layer
Data Source
AI summary
As a receptor layer, a film of a composite material of a base material such as a polymer and particles that adsorb an analyte is used. When the present invention is applied to a surface stress sensor or the like, the Young's modulus of the receptor layer, which significantly affects detection sensitivity, can be preset with a high degree of freedom, by independently selecting particles that adsorb a desired analyte and a base material that disperses said particles therein.