Journal article
Microscopic Evaluation of Acid-Etched Optical Fibers
Analytical letters, Vol.24(12), pp.2123-2145
12/01/1991
DOI: 10.1080/00032719108053040
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.
Details
- Title: Subtitle
- Microscopic Evaluation of Acid-Etched Optical Fibers
- Creators
- Maureen Stuever Kaltenbach - Department of Chemistry , University of IowaAbigail S Barber - Department of Chemistry , University of IowaGilda V Diaz - Department of Chemistry , University of IowaMark A Arnold - Department of Chemistry , University of Iowa
- Resource Type
- Journal article
- Publication Details
- Analytical letters, Vol.24(12), pp.2123-2145
- Publisher
- Taylor & Francis Group
- DOI
- 10.1080/00032719108053040
- ISSN
- 0003-2719
- eISSN
- 1532-236X
- Language
- English
- Date published
- 12/01/1991
- Academic Unit
- Fraternal Order of Eagles Diabetes Research Center; Center for Biocatalysis and Bioprocessing; Chemistry
- Record Identifier
- 9984217447202771
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