Nitrogen-Modified Carbon Electrode for Sensitive Electrochemical Measurement
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Solution Overview
Problem
Existing carbon electrodes do not provide sufficient sensitivity for electrochemical measurements.
Innovation Solution
The electrode comprises a conductive carbon layer with a nitrogen-to-carbon ratio (N/C) of 0.001 or more on one surface, measured by X-ray photoelectron spectroscopy, and a lower ratio on the other surface, with a metal underlying layer in between, enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional carbon electrode structure is used, then the device is simple and easy to manufacture, but the sensitivity to the object to be measured is insufficient
Solution Approach 1:
The patent applies local quality by creating a nitrogen-modified region specifically at the one-side surface of the conductive carbon layer. This localized modification ensures that only the measurement-facing surface has enhanced sensitivity properties, while the rest of the electrode structure remains simple and conventional. The nitrogen-to-carbon ratio control is applied locally rather than throughout the entire electrode.
Solution Approach 2:
The patent changes the chemical composition parameter of the conductive carbon layer by controlling the nitrogen-to-carbon ratio to be 0.001 or more on the one-side surface. This parameter change fundamentally alters the surface properties to enhance sensitivity without requiring a complete redesign of the electrode structure.
2Measurement precision
If the nitrogen-to-carbon ratio is increased throughout the entire conductive carbon layer, then sensitivity improves, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of uniformly increasing nitrogen content throughout the entire conductive carbon layer, the patent applies nitrogen modification only to the one-side surface that contacts the measurement medium. This localized approach achieves the necessary sensitivity improvement while minimizing manufacturing complexity and cost.
Solution Approach 2:
The patent applies partial action by modifying only the necessary portion (one-side surface) of the conductive carbon layer with nitrogen. This avoids the excessive action of treating the entire layer, thereby reducing manufacturing complexity while achieving sufficient sensitivity enhancement.
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 electrode achieves excellent sensitivity for electrochemical measurements, particularly with glucose, through improved electron transfer efficiency and electrostatic interactions.
Implementation Method 1
a ratio (N/C) of nitrogen to carbon on a one-side surface of the conductive carbon layer in the thickness direction is measured by using X-ray photoelectron spectroscopy
Implementation Method 2
improved electron transfer efficiency and electrostatic interactions
Data Source
Figure 1~2
AI summary
An electrode (1) includes a substrate film (2) and a conductive carbon layer (4) in order toward one side in a thickness direction. A ratio (N/C) of nitrogen to carbon on a one-side surface of the conductive carbon layer in the thickness direction is measured by using X-ray photoelectron spectroscopy, and the ratio is 0.001 or more.