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- W2011837211 abstract "Abstract Optical and scanning electron microscopy were used to examine the changes in the surface morphology of optical fibers as a result of acid etching. The resulting surface modifications are modeled and the resulting structures are considered as alternatives to conventional fibers for chemical sensor development. Hydrofluoric acid (HF) etching has been performed on the tips of flat-end graded index fibers, and spherical-end graded and step index fibers. The acid treatment caused the formation of a cone-shaped hollow in the center of graded index fiber tips. This structure provides a surface area enhancement of up to 5.3-fold over untreated fibers. In addition, this cone-shaped cavity provides a sub-nanoliter reservoir in which reagent can be held at the sensing tip of the fiber. Spherical-end fibers provide surface area increases of up to 35-fold compared to flat-end fibers. With spherical-end step index fibers, HF etches the cladding, but not the core, thereby providing an even greater surface area for reagent immobilization. The potential utility of these acid etched fibers for the development of fiber-optic chemical sensors (FOCS) is discussed." @default.
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- W2011837211 date "1991-12-01" @default.
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- W2011837211 title "Microscopic Evaluation of Acid-Etched Optical Fibers" @default.
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- W2011837211 doi "https://doi.org/10.1080/00032719108053040" @default.
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