Non-Noble Metal Composite Electrode for Biosensor Stability
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Solution Overview
Problem
Current biosensors face challenges in achieving consistent and accurate measurements using non-noble metal electrodes due to high background currents and inadequate electron transfer kinetics, making them unsuitable as cost-effective alternatives to noble metal electrodes.
Innovation Solution
The development of biosensor components with a conductive non-noble metal alloy composite layer, specifically comprising nickel and chromium with a resistive material like carbon, which enhances anodic stability and electron transfer kinetics, reducing manufacturing costs while maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-noble metal electrodes are used to reduce manufacturing costs, then manufacturing cost decreases, but measurement accuracy and reliability deteriorate due to high background currents and inadequate electron transfer kinetics
Solution Approach 1:
The patent applies composite materials by combining non-noble metals (such as nickel, chromium, or their alloys) with noble metal particles (such as gold, silver, or platinum nanoparticles) to create a hybrid electrode material. This composite structure allows the electrode to benefit from the cost-effectiveness and structural stability of non-noble metals while incorporating the superior electrochemical performance and electron transfer kinetics of noble metal particles, thereby resolving the contradiction between manufacturing cost and measurement accuracy
Solution Approach 2:
The patent implements local quality by creating a non-uniform distribution of materials within the electrode structure. Specifically, noble metal particles are dispersed locally within the non-noble metal matrix, concentrating the expensive but high-performance material only where electrochemical reactions occur most intensely. This localized application of noble metals optimizes measurement accuracy and electron transfer kinetics while minimizing overall material cost compared to using pure noble metal electrodes throughout
2Ease of manufacture
If non-noble metal electrodes are used to reduce manufacturing costs, then manufacturing cost decreases, but electron transfer kinetics and anodic stability worsen
Solution Approach 1:
The patent uses composite materials combining non-noble metals with noble metal particles to create an electrode that exhibits both cost-effectiveness and superior electron transfer kinetics. The noble metal particles embedded in the non-noble metal matrix provide facilitated electron transfer pathways, while the non-noble metal base provides structural support and cost efficiency
Solution Approach 2:
The patent applies mechanics substitution by replacing the purely mechanical/structural role of expensive noble metal electrodes with a composite system where non-noble metals provide the structural framework and noble metal particles provide the electrochemical functionality. This substitution allows the system to achieve the same electrochemical performance through a different material architecture that is less costly
3Measurement precision
If noble metal electrodes are used to improve measurement accuracy and stability, then measurement accuracy improves, but manufacturing cost increases
Solution Approach 1:
The patent applies composite materials by creating a hybrid electrode structure that combines the electrochemical excellence of noble metals with the cost advantages of non-noble metals. This composite approach maintains measurement accuracy by ensuring noble metal particles are present at the electrochemically active surfaces while reducing overall manufacturing cost through the use of cheaper non-noble metal bulk materials
Solution Approach 2:
The patent implements this principle by using non-noble metals as the bulk electrode material that provides structural support and can be easily replaced, while incorporating small amounts of expensive noble metal particles that provide the critical electrochemical performance. This allows the system to achieve high measurement accuracy without requiring large quantities of expensive noble metals throughout the entire electrode structure
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 composite layer improves anodic stability and electron transfer kinetics, enabling biosensors to provide consistent and accurate biological sample measurements, thus addressing the limitations of non-noble metal electrodes and offering a cost-effective solution.
Implementation Method 1
the conductive layer is a physical vapor deposited composite of a conductive non-noble metal component and a resistive material component
Data Source
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AI summary
A biosensor component that provides enhanced characteristics for use in biosensors, such as blood glucose sensors. The biosensor component comprises a substrate, and a composite layer deposited on the substrate. The composite layer includes a conductive metal component and a resistive material component, where the conductive metal component comprises one or more non-noble metals, and where the resistive material component in the composite layer is present in an amount greater than 20 atomic percent.