ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this paper we report results for an intrinsic evanescent field sensor based on nonregularplastic optical fiber with smart polymer film containing Malachite GreenMG+([PhC(C6H4NMe2)3]+) as an absorption reagent, which coats the fiber's thermally imperfectedarea. Thermal imperfections were created by touching the fiber with a heated metal rounded tip.The changes in color and absorption characteristics of the polymer film depend on the acidic andbasic environmental properties of the sensing area. An imperfected plastic optical fiber withMalachite Green coating has been presented for the detection of ammonia vapor. We discuss someexperimental results that confirm our theoretical predictions. The combination of different thermalimperfection topologies and film’s thickness enabled the design of a bio-chemical sensor with highsensitivity and linearity over a wide measurement range. Additional increase of the evanescent fieldinteraction can be achieved by implementing the imperfection area on a bent fiber
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.343.pdf
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