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Preparation of pH sensors by covalent linkage of dye molecules to the surface of polystyrene optical fibers

Authors

  • B. S. Rao,

    1. Department of Medicine, Renal-Electrolyte Division, 1191 Scaife Hall, School of Medicine, University of Pittsburgh, Pennsylvania 15261
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  • J. B. Puschett,

    1. Department of Medicine, Renal-Electrolyte Division, 1191 Scaife Hall, School of Medicine, University of Pittsburgh, Pennsylvania 15261
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  • K. Matyjaszewski

    Corresponding author
    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
    • Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
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Abstract

Functional Bromothymol Blue dyes containing amino groups in position 3 have been immobilized on the surface of chlorosulfonated polystyrene fibers and characterized by ESCA. Upon laser irradiation, a modified fiber has been used as an antenna fiber in a twisted pair of plastic optical fibers immersed in aqueous solutions having various pH. The light transmitted to the receiving fiber depends on pH values. This device can be used as a pH sensor.

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