Nickel-Chromium Alloy Biosensor Electrodes via Physical Vapor Deposition
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Solution Overview
Problem
Current biosensors, particularly glucometers, face challenges in achieving accurate and consistent glucose measurements due to the high cost of noble metal electrodes and the inadequacy of non-noble metal electrodes in replicating their electrochemical responses.
Innovation Solution
Development of biosensor components featuring a conductive layer composed of nickel and chromium alloys, with specific weight percent ratios, applied via physical vapor deposition on a substrate, which mimics the performance of noble metal electrodes while reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If noble metals (gold, palladium, platinum) are used for electrode coating, then measurement precision and chemical resistance are improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent changes the material composition parameters by using non-noble metal alloys (nickel-chromium, nickel-cobalt, nickel-iron, or copper-chromium) with specific compositional ratios instead of pure noble metals. This parameter change maintains adequate electrochemical performance while dramatically reducing manufacturing costs, directly resolving the contradiction between measurement precision and manufacturing cost.
Solution Approach 2:
The patent employs composite alloy materials combining non-noble metals (nickel with chromium, cobalt, or iron; or copper with chromium) to create electrodes that exhibit improved electrochemical response characteristics compared to pure non-noble metals. These composite materials provide a cost-effective alternative to noble metals while maintaining measurement accuracy, addressing both cost and performance requirements.
2Ease of manufacture
If non-noble metals are used for electrode coating, then manufacturing cost is reduced, but electrochemical response consistency deteriorates
Solution Approach 1:
The patent optimizes the compositional parameters of non-noble metal alloys, specifying particular weight percentage ranges for each element (e.g., nickel 60-80%, chromium 10-30%; or nickel 70-85%, cobalt 10-20%). These precise parameter specifications ensure consistent electrochemical responses across different production batches, resolving the reliability issue while maintaining cost advantages.
Solution Approach 2:
The patent uses composite alloy structures where non-noble metals are combined in specific ratios to create materials with enhanced and consistent electrochemical properties. The alloying elements work synergistically to provide stable electrochemical responses, overcoming the inconsistency problem of pure non-noble metals while maintaining cost-effectiveness.
3Ease of manufacture
If pure non-noble metals are used for electrode coating, then manufacturing cost is reduced, but dose-response accuracy deviates significantly from noble metal standards
Solution Approach 1:
The patent employs composite alloy materials where non-noble metals are combined with specific elements in controlled ratios. These composite structures produce electrochemical responses that closely match noble metal dose-response characteristics, achieving manufacturing precision requirements while maintaining cost advantages through the use of non-noble base metals.
Solution Approach 2:
The patent optimizes alloy composition parameters to control electrochemical behavior, specifying precise weight percentage ranges that tune the dose-response characteristics to match noble metal standards. This parameter optimization enables cost-effective electrodes to achieve the required measurement accuracy and dose-response linearity.
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 provide consistent and accurate electrochemical responses, deviating minimally from noble metal dose-response slopes, thus enabling cost-effective and reliable glucose measurement in biosensors.
Implementation Method 1
Physical vapor deposited biosensor components
Data Source
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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 and chromium, such that a combined weight percent of the nickel and chromium in the conductive layer is in the range of 50 to 99 weight percent.