Optical Detection Chip Layer Structure for Fast Sulfur Gas Sensing
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Solution Overview
Problem
Existing detection methods for gases in oral breath, such as hydrogen sulfide and methyl mercaptan, face challenges in accuracy and speed due to the complexity of oral gases, which contain multiple volatile organic compounds, and are influenced by humidity, making practical application difficult.
Innovation Solution
An optical detection chip with a translucent substrate and a layer structure containing a dye layer with specific organic dye molecules and metal ions, capable of changing color in response to hydrogen sulfide or methyl mercaptan, combined with a particle layer and organic compound layer to enhance sensitivity and separation of ammonia and phenol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional colorimetric analysis with copper ion and DCIP is used to detect hydrogen sulfide in oral gas, then detection sensitivity is improved, but measurement time increases significantly and humidity interference worsens
Solution Approach 1:
The patent extracts and separates the detection of specific gases (hydrogen sulfide and methyl mercaptan) from the complex oral gas mixture by using selective chemical reactions with copper ions and DCIP. The layer structure is designed to specifically capture these target gases while excluding other volatile organic compounds, enabling focused detection without interference from the full complexity of oral gas composition.
Solution Approach 2:
The patent employs a porous support structure (such as porous glass or polymer membranes) to hold the copper ion-DCIP reagent layer. This porous structure provides high surface area for gas interaction, enhancing detection sensitivity while maintaining rapid gas diffusion through the layer, thus reducing measurement time compared to traditional bulk reagent systems.
2Measurement precision
If oral gas is collected for analysis, then detection of periodontal disease markers is enabled, but sample quantity is limited and measurement time increases
Solution Approach 1:
The porous support structure provides extremely high surface area to volume ratio, allowing the limited oral gas sample to interact with maximum reagent surface area. This enhances the efficiency of gas capture and enables accurate detection even with minute sample quantities that would be insufficient for traditional bulk reagent methods.
Solution Approach 2:
The patent creates a composite structure combining copper ions, DCIP, and porous support material. This composite provides both high sensitivity for trace gas detection and rapid response, enabling accurate measurement of periodontal disease markers from limited oral gas samples without requiring extensive sample collection or concentration steps.
3Adaptability or versatility
If multiple volatile organic compounds are present in oral gas, then comprehensive diagnostic information is available, but separation and individual measurement of specific gases becomes difficult
Solution Approach 1:
The patent applies local quality by creating a layer structure with specific chemical properties localized at the detection interface. The copper ion-DCIP layer is positioned and configured to provide selective affinity for hydrogen sulfide and methyl mercaptan, while the porous support structure provides physical separation capabilities. This localized functional design enables specific gas detection within the complex mixture without requiring separation of all volatile organic compounds.
Solution Approach 2:
The patent utilizes parameter changes in the form of selective chemical reactions - copper ions form specific complexes with sulfur-containing gases (hydrogen sulfide and methyl mercaptan) that cause distinct color changes. This chemical parameter selectivity allows differentiation and measurement of specific target gases from the broader volatile organic compound mixture based on their unique reaction characteristics.
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 optical detection chip accurately measures hydrogen sulfide and methyl mercaptan in a short time, overcoming the limitations of existing methods by providing high sensitivity and specificity.
Implementation Method 1
the dye layer including an organic dye molecule including an amino group, a ketone group, or a quinone, and any one or two metal ions selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn, Cd, Hg, Ag, Pb and Tl, and the dye layer capable of changing color by reacting with a gas subject to detection including at least one of hydrogen sulfide or methyl mercaptan
Implementation Method 2
a dehumidifying filter and multiple optical detection devices to separate and measure these gases accurately
Data Source
AI summary
Provided is an optical detection chip that makes it possible to accurately measure, in a short time, hydrogen sulfide and methyl mercaptan contained in a gas subject to detection. An optical detection chip is provided with: an optically transparent substrate; and a layer structure provided with a pigment layer that is formed on the optically transparent substrate, that includes organic pigment molecules containing amino groups, ketone groups, or quinones, as well as metal ions of at least one kind selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn, Cd, Hg, Ag, Pb, and Tl, and that exhibits a color change in response to a gas subject to detection including at least one of hydrogen sulfide and methyl mercaptan.