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Proceedings Paper

Sol-gel coating-based fiber O2/DO sensors
Author(s): Mahmoud R. Shahriari; Jack Y. Ding; J. Tong; George H. Sigel Jr.
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Paper Abstract

An intrinsic fiber optic environmental sensor has been developed for on-line monitoring of oxygen gas and dissolved oxygen (DO). In this O2/DO sensor, a highly stable compound [Tris-(4,7-Diphenyl-1, 10-phenanthroline) Ruthenium (II) complex] is synthesized and selected as a chemical indicator for oxygen. A hybrid matrix is designed by a sol-gel process and used as a stable substrate for the immobilization of Ru compound. The microporous nature of the nondensified sol-gel coating, in which the photochemical dye is immobilized, provides a unique local structure that is environmentally stable and immune to photochemical bleaching and chemical leaching. The doped hybrid material is then coated on a porous optical fiber substrate used as the sensing component. The oxygen penetrates into the interconnective porous core and interacts with the immobilized Ru compound in which in-line dynamic luminescence quenching takes place. The use of Ru(ph2phen)3[2+] as a highly stable, reagent sensing indicator and also the use of the sol-gel coating technique for the immobilization and incorporation of Ru compound to porous core optical fibers have resulted in the development of an intrinsic O2/DO sensor with high sensitivity, reproducibility, and long-term stability.

Paper Details

Date Published: 10 March 1994
PDF: 17 pages
Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); doi: 10.1117/12.170670
Show Author Affiliations
Mahmoud R. Shahriari, Rutgers Univ. (United States)
Jack Y. Ding, Rutgers Univ. (United States)
J. Tong, Rutgers Univ. (United States)
George H. Sigel Jr., Rutgers Univ. (United States)

Published in SPIE Proceedings Vol. 2068:
Chemical, Biochemical, and Environmental Fiber Sensors V
Robert A. Lieberman, Editor(s)

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