Transition Metal Oxide Sensor Array for Breath Gas Specificity
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Solution Overview
Problem
Current sensor technologies, such as electronic noses, lack specificity in recognizing particular gaseous compounds, which is a limitation in their medical applications for detecting diseases through breath analysis.
Innovation Solution
An apparatus with a probe containing one or more sensor elements made of transition metal oxides like WO3, beta-MoO3, and UO2, which selectively change conductivity in response to specific gaseous compounds, allowing for a unique signature output that can be analyzed to identify the type and amount of analytes in breath, employing an array of sensors with different transition metal oxides to enhance specificity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor technologies are used for breath analysis, then the detection capability is achieved, but the specificity in recognizing particular gaseous compounds deteriorates
Solution Approach 1:
The sensor system is segmented into multiple individual sensor elements, each containing a different transition metal oxide material (WO3, beta-MoO3, UO2). Each sensor element responds to specific gaseous compounds, and the combined responses form a unique signature pattern that enables highly specific identification of target analytes in breath samples.
Solution Approach 2:
Each sensor element in the array possesses distinct local quality through the use of different transition metal oxide materials. This local differentiation in material composition gives each sensor element specific sensitivity to particular gaseous compounds, allowing the system to distinguish between different analytes based on their characteristic response patterns.
2Reliability
If a single sensor element is used, then the device complexity is reduced, but the ability to selectively recognize particular analytes deteriorates
Solution Approach 1:
The system employs a composite approach by integrating multiple sensor elements with different transition metal oxide materials (WO3, beta-MoO3, UO2) into a single probe array. This composite structure leverages the complementary sensing characteristics of each material to achieve reliable and selective analyte recognition that would be impossible with a single sensor element.
Solution Approach 2:
The sensor array achieves multi-functionality by enabling detection of multiple different gaseous compounds simultaneously using a single integrated probe system. Each transition metal oxide material contributes its specific sensing capability, making the overall system universally applicable to detect various analytes including NO2, ammonia, and other breath biomarkers.
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 apparatus achieves selective detection of gaseous compounds, providing information about medical conditions by analyzing the characteristic responses of the sensor array, improving the specificity and accuracy of disease diagnosis through breath analysis.
Implementation Method 1
one or more sensor elements having a conductivity which is responsive to the presence of selected gaseous compounds, at least one sensor element containing a transition metal oxide selected from the group consisting of WO3, beta-MoO3 and UO2
Data Source
AI summary
An apparatus is for detecting the presence of selected gaseous compounds indicative of a medical condition includes a probe having one or more sensor elements having a conductivity which is responsive to the presence of selected gaseous compounds, at least one sensor element containing a transition metal oxide selected from the group consisting of WO3, beta-MoO3 and UO2; and means for measuring the conductivity of each said sensor element.