Carbon Particle Electrode with Cell Membrane Mimetic Layer for Glucose Sensors
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Solution Overview
Problem
Existing glucose sensors face challenges in achieving high manufacturing efficiency, stability, and usability due to limitations in substrate material and shape, which affect electron transfer efficiency and sensor performance.
Innovation Solution
An electrochemical sensor is developed using a carbon particle-based electrically conductive layer combined with a cell membrane mimetic structure layer containing an enzyme, allowing for high orientation immobilization of oxidoreductase enzymes and eliminating the need for toxic mediators, enabling efficient electron transfer and improved long-term stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional substrate materials and shapes are used, then manufacturing simplicity is maintained, but electron transfer efficiency and sensor performance deteriorate
Solution Approach 1:
The patent employs a porous carbon particle layer as the electrode substrate, which provides high surface area and excellent electron transfer properties. The porous structure allows efficient electron transport while maintaining ease of manufacture through simple coating processes, resolving the contradiction between performance and manufacturing complexity.
Solution Approach 2:
The patent uses a composite structure combining carbon particles with a cell membrane mimetic polymer matrix. This composite material provides both the electrical conductivity needed for high electron transfer efficiency and the structural properties for easy manufacturing, simultaneously improving reliability and ease of manufacture.
2Reliability
If enzyme immobilization is attempted without cell membrane mimetic structure, then manufacturing simplicity is maintained, but enzyme orientation and long-term stability deteriorate
Solution Approach 1:
The cell membrane mimetic polymer acts as an intermediary layer between the carbon particle electrode and the oxidoreductase enzyme. This intermediary provides a biocompatible environment that maintains enzyme orientation and activity while simplifying the overall manufacturing process, thus improving long-term stability without significantly increasing device complexity.
Solution Approach 2:
The patent changes the physical and chemical parameters of the immobilization environment by introducing the cell membrane mimetic polymer structure. This creates optimal conditions for enzyme stability and orientation, achieving high reliability while keeping the manufacturing process relatively simple through parameter optimization rather than structural complexity.
3Speed
If traditional electrode materials are used, then manufacturing simplicity is maintained, but responsiveness and electron transfer ability deteriorate
Solution Approach 1:
The porous carbon particle structure provides extensive surface area and numerous electron transfer pathways, enabling rapid responsiveness to glucose detection. The simplicity of coating carbon particles onto the substrate maintains ease of manufacture, thus achieving high speed performance without significant manufacturing complexity.
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 sensor exhibits enhanced response sensitivity and stability, facilitating continuous glucose measurement with improved manufacturing efficiency and in vivo safety, making it suitable for implantable devices.
Implementation Method 1
an electrically conductive layer made of carbon particles which is disposed on the substrate... efficient electron transfer between enzyme and electrode
Implementation Method 2
a cell membrane mimetic structure layer containing an oxidoreductase... a reaction of an enzyme has been widely used as a sensor to specifically detect various physiologically active substances
Implementation Method 3
immobilizing a membrane-associated oxidoreductase... electron transfer pathway from the membrane-associated enzyme to the electrode
Data Source
AI summary
The present invention provides an electrochemical sensor comprising a substrate, an electrically conductive layer made of carbon particles which is disposed on the substrate, a cell membrane mimetic structure layer containing an enzyme at least one of inside the cell membrane mimetic structure layer and on the interface of the cell membrane mimetic structure layer which is disposed on the electrically conductive layer.