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Proceedings Paper

Fiber-Optic Chemical Sensors Based On Energy Transfer
Author(s): Ping Yuan; D. Jordan; F. P. Milanovich; David R. Walt
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Paper Abstract

The development of energy transfer based fiber-optic sensors provides a new approach to optical sensing and offers greater flexibility in the choice of analyte specific dyes. We have successfully constructed a physiological pH fiber-optic chemical sensor based on energy transfer from a pH insensitive fluorophore, eosin, to a pH sensitive absorber, phenol red. As the pH increases, phenol red's absorption increases in the spectral region that overlaps with the emission spectrum of eosin. Since the extent of energy transfer is proportional to the spectral overlap integral, the amount of energy transfer increases as the pH increases resulting in a diminished fluorescence intensity. Our present efforts are aimed at preparing pH sensitive dyes based on intramolecular energy transfer. Since the energy transfer efficiency is inversely proportional to the sixth power of the distance between the donor and acceptor, the small intramolecular distance should lead to very efficient energy transfer. Several types of intramolecular systems are being investigated.

Paper Details

Date Published: 21 June 1988
PDF: 2 pages
Proc. SPIE 0906, Optical Fibers in Medicine III, (21 June 1988); doi: 10.1117/12.945250
Show Author Affiliations
Ping Yuan, Tufts University (United States)
D. Jordan, Tufts University (United States)
F. P. Milanovich, Tufts University (United States)
David R. Walt, Tufts University (United States)

Published in SPIE Proceedings Vol. 0906:
Optical Fibers in Medicine III
Abraham Katzir, Editor(s)

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