Nanopore Electrode Gas Sensor with Fluorine Coating
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Solution Overview
Problem
Current methods for detecting nitrogen monoxide and oxygen gases in biological systems are complex, costly, and not suitable for real-time analysis, and existing electrochemical sensors face challenges in selectively sensing gases due to electrode composition and morphology.
Innovation Solution
A gas sensor with a nanopore electrode coated with a fluorine compound is developed, which selectively detects diatomic gases based on polarity, enhancing sensitivity and resolution by increasing the electrode's surface area through platinum coating and fluorine compound polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electrochemical sensors are used to detect nitrogen monoxide and oxygen, then real-time detection capability is achieved, but sensor capacity is insufficient due to electrode composition limitations
Solution Approach 1:
The electrode is constructed as a composite material system combining platinum base material with fluorinated photocurable monomer coating. This composite structure leverages the high catalytic activity of platinum for electrochemical reactions while the fluorinated polymer coating provides selective gas permeability and prevents ion absorption, thereby enhancing detection sensitivity without excessive complexity
Solution Approach 2:
The fluorinated photocurable monomer forms a porous polymer coating on the electrode surface. This porous structure allows selective diffusion of diatomic gases (O2, NO) to the platinum surface while blocking larger ions and molecules, achieving high detection sensitivity through size-based and polarity-based selective transport
2Measurement precision
If chemiluminescence method or electron paramagnetic resonance spectroscopy is used to detect nitrogen monoxide, then detection capability is improved, but analysis complexity and cost increase
Solution Approach 1:
The patent replaces complex optical detection systems (chemiluminescence) or resonance spectroscopy systems with a simpler electrochemical sensing system. The electrochemical sensor uses direct electron transfer reactions at the platinum electrode surface, eliminating the need for complex optical paths, photomultipliers, or EPR spectrometers while maintaining real-time detection capability
Solution Approach 2:
The fluorinated photocurable monomer acts as an intermediary layer between the nitrogen monoxide gas and the platinum electrode. It selectively transports NO molecules to the electrode surface while blocking interfering substances, enabling specific detection without complex sample preparation or analysis systems
3Productivity
If ultra microelectrode with nanopore structure is used, then material delivery to electrode surface is enhanced, but selective sensing capability is insufficient without proper surface treatment
Solution Approach 1:
The patent changes the surface properties of the electrode by coating with fluorinated photocurable monomer. This modifies the surface polarity, hydrophobicity, and pore size distribution, creating selective transport pathways that allow fast delivery of diatomic gases while blocking other substances, thereby achieving both high productivity and high selectivity
Solution Approach 2:
The fluorinated coating is applied locally on the electrode surface, creating regions with different properties: the nanopore structure provides fast transport channels while the fluorinated polymer regions provide selective filtration. This local differentiation of properties enables simultaneous achievement of high material delivery speed and high gas selectivity
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 gas sensor achieves high sensitivity and selectivity for oxygen detection while avoiding ion absorption issues, allowing for real-time analysis of diatomic gases like oxygen and nitrogen monoxide, with increased lifespan and improved polarity-dependent sensing capabilities.
Implementation Method 1
wherein the fluorine compound is coated on the nanopore electrode by polymerization with photocuring
Implementation Method 2
measuring an electrochemical oxidation-reduction reaction of a diatomic gas
Data Source
AI summary
The present disclosure relates to a gas sensor including a nanopore electrode and a fluorine compound coated on the nanopore electrode, and also relates to a preparing method of the gas sensor.