Synthesis and characterization of multilayered sol–gel based plastic-clad fiber optic pH sensor
The fabrication and characterization of an optical fiber pH sensor for the detection range 3-11 are described. The sensing element consists of a combination of indicators encapsulated in mesoporous surfactant based hybrid matrix, which are deposited onto an uncladed plastic optical fiber. Stable, de...
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| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier B.V.
2015
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/58858/ http://dx.doi.org/10.1016/j.jiec.2014.08.007 |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | The fabrication and characterization of an optical fiber pH sensor for the detection range 3-11 are described. The sensing element consists of a combination of indicators encapsulated in mesoporous surfactant based hybrid matrix, which are deposited onto an uncladed plastic optical fiber. Stable, dense and uniform sol-gel cladding with more than 90% transparency in the visible range are observed. Roughness value 9.7-6.57 nm is obtained by AFM. Film thickness, refractive index, and porosity are found to vary with number of coatings, 70% porosity is determined with 116 nm thickness. The response of the sensor with third layer is observed in acid and basic medium. |
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