Nanohybrid Nitric Oxide Sensor Using Quantum Dot Fluorescence
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Solution Overview
Problem
Current methods for detecting nitrogen monoxide concentrations are non-selective and inaccurate due to interference from other physiological substances, and existing sensors struggle to measure infinitesimal amounts of nitrogen monoxide effectively.
Innovation Solution
A nanohybrid sensor comprising a fluorescent semiconducting quantum dot with a core-shell structure and a transition metal compound, specifically surface-modified with functional groups, is developed to selectively detect nitrogen monoxide by emitting light in its presence, avoiding interference from other compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electrochemical methods are used to measure nitrogen monoxide concentration, then measurement can be performed, but selectivity is poor due to interference from other physiological substances
Solution Approach 1:
The patent introduces a fluorescent probe as an intermediary substance that selectively binds to nitrogen monoxide. This probe acts as a mediator between the target analyte (NO) and the detection system, enabling selective measurement through fluorescence signal changes only when NO is present, thereby eliminating interference from other substances.
Solution Approach 2:
The patent utilizes fluorescence emission changes as an optical signal to indicate nitrogen monoxide presence. The fluorescent probe exhibits specific emission characteristics that change upon binding with NO, allowing detection through optical property changes rather than electrochemical reactions, thus achieving high selectivity.
2Reliability
If polymer coatings are applied to enhance selectivity, then selectivity to nitrogen monoxide improves, but measurement results are significantly affected by coating thickness and number
Solution Approach 1:
The patent changes the fundamental detection parameter from electrochemical signal (affected by polymer coating properties) to optical fluorescence signal. This parameter change eliminates sensitivity to coating thickness and number, as fluorescence detection does not depend on electrode surface properties but rather on the molecular interaction between the probe and nitrogen monoxide.
3Ease of manufacture
If photoluminescence methods are used to measure nitrogen monoxide, then commercial availability is achieved, but measurement is indirect and affected by reaction conditions
Solution Approach 1:
The patent employs a pre-designed fluorescent probe that has been prepared in advance with specific molecular structures optimized for nitrogen monoxide binding. This preliminary preparation of the probe eliminates the need for complex reaction condition optimization during measurement, as the probe is already configured to selectively and directly detect NO through fluorescence.
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 nanohybrid sensor achieves selective and sensitive detection of nitrogen monoxide at levels as low as several nanomoles, providing accurate concentration measurements without interference from other substances, enhancing the precision of nitrogen monoxide detection.
Implementation Method 1
a fluorescent semiconducting quantum dot
Data Source
AI summary
The present invention provides a nanohybrid type nitrogen monoxide detecting sensor and a production method therefor in which the nanohybrid type nitrogen monoxide detecting sensor includes a fluorescent semiconducting quantum dot and a transition metal compound. Employing a nanohybrid structure including semiconducting quantum dot nano-particles combined with a molecule recognizer selectively forming a bonding to nitrogen monoxide, the nitrogen monoxide detecting sensor is enabled to detect an infinitesimal amount of nitrogen monoxide by bringing about photoluminescence upon detection of nitrogen monoxide.