Fiber sensor

A sensor fiber comprising:

• an elongated, unsupported three-dimensional fiber body comprising an electrically insulating polymeric material, the fiber body having a fiber length and an outer fiber body surface along the fiber length;
• at least one transduction element comprising a chemiluminescent material disposed within the fiber body along at least a portion of the fiber, the chemiluminescent material emitting chemiluminescent light upon exposure to a target intake species with a wavelength of chemiluminescence indicative of the target intake species;
• at least one intake microcapillary disposed within the fiber body and extending the fiber length for intake of species to be sensed, the chemiluminescent material being in communication with a microcapillary for exposure of the chemiluminescent material to an intake species;
• at least one photoconducting element comprising a semiconducting material arranged in the fiber body in optical communication with the transduction element to receive chemiluminescent light produced by the chemiluminescent material upon reaction of the chemiluminescent material with the target species to produce a corresponding electrical sensing signal indicative of the target intake species;
• and
• at least one pair of electrically conducting electrodes in electrical connection with the photoconducting element in the fiber body, the pair of electrodes extending the fiber length to transmit the electrical sensing signal to an end of the fiber body.