Nickel-Chromium-Iron Biosensor Electrode via PVD
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biosensors using non-noble metal electrodes face challenges in achieving consistent and accurate glucose measurements due to deviations in electrochemical responses and inadequate electron transfer kinetics, making them unsuitable replacements for noble metal electrodes, while also being cost-prohibitive.
Innovation Solution
A biosensor electrode comprising a substrate with a conductive layer made of a nickel-chromium alloy, with specific weight percent ranges of nickel and chromium, and optionally including iron, manganese, copper, and silicon, coated via physical vapor deposition, which provides improved electrochemical properties and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-noble metal electrodes are used to reduce manufacturing costs, then cost is reduced, but electrochemical response consistency and measurement accuracy deteriorate
Solution Approach 1:
The patent changes the compositional parameters of the electrode material from pure noble metals to non-noble metal alloys with specific compositions. By carefully controlling the alloy composition (e.g., nickel-chromium-iron with specific weight percentages), the electrode achieves both cost reduction and maintained measurement accuracy through optimized material parameters.
Solution Approach 2:
The patent employs composite alloy materials combining multiple non-noble metals (nickel, chromium, iron, and trace elements) to create an electrode that replicates the electrochemical properties of noble metals. This composite approach allows cost reduction while maintaining or improving electrochemical response consistency through synergistic material combinations.
2Ease of manufacture
If non-noble metal electrodes are used to reduce manufacturing costs, then cost is reduced, but electron transfer kinetics deteriorate
Solution Approach 1:
The patent optimizes the compositional parameters of the non-noble metal alloy to enhance electron transfer kinetics. By adjusting the ratios of nickel, chromium, iron, and trace elements, the electrode achieves reliable electron transfer rates comparable to noble metals, resolving the kinetics deficiency while maintaining cost advantages.
Solution Approach 2:
The patent introduces trace elements (manganese, copper, silicon) at specific concentrations to locally enhance electron transfer properties at the electrode surface. These localized compositional adjustments improve electron transfer kinetics without significantly increasing overall manufacturing cost.
3Ease of manufacture
If non-noble metal electrodes are used to reduce manufacturing costs, then cost is reduced, but anodic stability deteriorates
Solution Approach 1:
The patent uses composite alloy materials where chromium and iron components provide corrosion resistance and anodic stability. The synergistic combination of nickel-chromium-iron with trace elements creates a stable electrochemical interface that resists oxidation and maintains composition stability, matching noble metal performance at lower cost.
Solution Approach 2:
The patent controls the compositional parameters, particularly chromium and iron content, to enhance anodic stability. By optimizing these parameters within specific ranges, the electrode achieves improved resistance to anodic dissolution and oxidation, ensuring long-term stability without requiring expensive noble metals.
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 nickel-chromium alloy electrodes offer consistent and accurate glucose measurements with enhanced electron transfer kinetics and anodic stability, reducing manufacturing costs and improving the reliability of biosensors.
Implementation Method 1
coated via physical vapor deposition
Data Source
AI summary
A biosensor component is provided that provides enhanced characteristics for use in biosensors, such as blood glucose sensors. The biosensor component comprises a substrate and a conductive layer coated on the substrate. The conductive layer includes nickel, chromium, and iron, such that a combined weight percent of the nickel and chromium in the conductive layer is in the range of 80 to less than 95 weight percent, and the weight percent of iron in the conductive layer is greater than 5 weight percent and less than 12 weight percent.