A dual fiber-optic sensor for oxygen and carbon dioxide

Area of Science:

• * Materials Science and Engineering
• * Analytical Chemistry
• * Biomedical Sensing

Background:

• * Accurate real-time monitoring of oxygen and carbon dioxide is crucial for clinical diagnostics and environmental monitoring.
• * Existing sensors often require multiple layers or separate detection mechanisms, increasing complexity and cost.
• * Development of integrated sensing platforms for multiple analytes is an active area of research.

Purpose of the Study:

• * To report a newly designed dual fiber optical sensor for simultaneous gas phase detection of oxygen and carbon dioxide.
• * To demonstrate the efficacy of a single sensing layer incorporating specific fluorescent dyes for dual-analyte detection.
• * To evaluate the sensor's resolution and performance within clinically relevant detection ranges.

Main Methods:

• * Fabrication of a dual fiber optical sensor utilizing a single sensing layer.
• * Immobilization of fluorescent dyes Pyrene Butyric Acid (PBA) and Hydroxy Pyrene Trisulphonate (HPTS) within the same matrix.
• * Characterization of the sensor's response to varying concentrations of oxygen and carbon dioxide in the gas phase.

Main Results:

• * Successful simultaneous detection of both oxygen and carbon dioxide using a single sensing layer.
• * Achieved a resolution of 0.1% for carbon dioxide detection.
• * Achieved a resolution of 0.5% for oxygen detection, within the clinical detecting range.

Conclusions:

• * The developed dual fiber optical sensor offers a novel and integrated approach for simultaneous oxygen and carbon dioxide sensing.
• * The use of a single sensing layer with immobilized fluorescent dyes (PBA and HPTS) provides an efficient platform for dual-analyte detection.
• * The sensor demonstrates promising performance with high resolution suitable for clinical applications.