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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Uranyl-specific binding at a functionalised interface: a chemophotonic fibre optic sensor platform.

Neil W Hayes¹, Clare J Tremlett, Patricia J Melfi

¹EvanesCo Ltd, Forde Court, Forde Road, Newton Abbot, Devon, UK.

|April 23, 2008

Summary

A novel fiber optic sensor detects uranyl ions (UO(2)(2+)) in solution using a color-changing complex. This chemical sensing method offers high sensitivity and specificity for radiological material detection.

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Last Updated: Jul 5, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

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Implementation of a Reference Interferometer for Nanodetection

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Published on: April 26, 2014

Area of Science:

Analytical Chemistry
Materials Science
Environmental Science

Background:

Conventional radiation-counting techniques face limitations in detecting radiological materials in solution due to extreme attenuation.
Chemical sensing offers an alternative approach for detecting specific radiological species, such as uranyl ions (UO(2)(2+)).

Purpose of the Study:

To develop a sensitive and specific method for detecting uranyl ions (UO(2)(2+)) in solution.
To utilize fiber optic technology for real-time chemical sensing of radiological species.

Main Methods:

A dihydroxy isoamethryin complex was immobilized on a plastic or glass fiber optic surface.
The complex exhibits a large extinction coefficient and undergoes a color change upon binding UO(2)(2+).
Spectral responses were monitored in red, green, and blue detector bands for optical power change measurement.

Main Results:

The fiber optic sensor demonstrated spectral changes greater on the surface compared to solution.
Binding of UO(2)(2+) was specific, with minimal interference from Gd(3+).
Detection sensitivities of 1 millidecibel (mdB) allowed confident detection of UO(2)(2+) at 50-100 parts per billion (ppb) levels.

Conclusions:

The developed fiber optic chemical sensor provides a sensitive and specific method for detecting uranyl ions in solution.
Real-time kinetic analysis enhances the discrimination between target species and potential interferents.
This approach overcomes limitations of conventional radiation-counting techniques for solution-phase radiological material detection.