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Combined imaging and chemical sensing using a single optical imaging fiber
K S Bronk1, K L Michael, P Pantano
1Max Tishler Laboratory for Organic Chemistry, Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA.
Analytical Chemistry
|September 1, 1995
Summary
This study introduces a novel fiber-optic sensor capable of simultaneous imaging and chemical detection. The innovative approach uses a modified coherent imaging fiber for real-time chemical analysis and visual data acquisition.
Area of Science:
- Biomedical Engineering
- Optical Sensing
- Chemical Analysis
Background:
- Traditional fiber-optic chemical sensors lack imaging capabilities.
- Coherent imaging fibers are limited to image transmission.
- A need exists for integrated visual and chemical sensing.
Purpose of the Study:
- To develop a fiber-optic sensor for simultaneous sample viewing and chemical detection.
- To demonstrate the application of modified coherent imaging fibers for chemical sensing.
- To create high-density sensor arrays for detailed analysis.
Main Methods:
- Deposition of an analyte-sensitive polymer layer on a coherent imaging fiber's distal surface.
- Development of pH and acetylcholine biosensor arrays (approx. 6000 optical sensors each).
- Integration with epifluorescence microscopy and a charge-coupled device for imaging and analysis.
Main Results:
- Successful demonstration of simultaneous visual and chemical sensing.
- Achieved 4-micron spatial resolution for visual information.
- Acetylcholine biosensor exhibited a 35 microM detection limit and <1s response time.
Conclusions:
- The developed technique enables combined histological imaging and chemical analysis.
- Modified coherent imaging fibers offer a versatile platform for advanced sensing applications.
- This technology advances remote sensing by providing integrated visual and chemical data.