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Journal of Nanophotonics

Applied light-side coupling with optimized spiral-patterned zinc oxide nanorod coatings for multiple optical channel alcohol vapor sensing
Author(s): Hazli Rafis Bin Abdul Rahim; Muhammad Quisar Bin Lokman; Sulaiman Wadi Harun; Gabor Louis Hornyak; Karel Sterckx; Waleed Soliman Mohammed; Joydeep Dutta
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Paper Abstract

The width of spiral-patterned zinc oxide (ZnO) nanorod coatings on plastic optical fiber (POF) was optimized theoretically for light-side coupling and found to be 5 mm. Structured ZnO nanorods were grown on large core POFs for the purpose of alcohol vapor sensing. The aim of the spiral patterns was to enhance signal transmission by reduction of the effective ZnO growth area, thereby minimizing light leakage due to backscattering. The sensing mechanism utilized changes in the output signal due to adsorption of methanol, ethanol, and isopropanol vapors. Three spectral bands consisting of red (620 to 750 nm), green (495 to 570 nm), and blue (450 to 495 nm) were applied in measurements. The range of relative intensity modulation (RIM) was determined to be for concentrations between 25 to 300 ppm. Methanol presented the strongest response compared to ethanol and isopropanol in all three spectral channels. With regard to alcohol detection RIM by spectral band, the green channel demonstrated the highest RIM values followed by the blue and red channels, respectively.

Paper Details

Date Published: 8 August 2016
PDF: 17 pages
J. Nanophoton. 10(3) 036009 doi: 10.1117/1.JNP.10.036009
Published in: Journal of Nanophotonics Volume 10, Issue 3
Show Author Affiliations
Hazli Rafis Bin Abdul Rahim, Univ. of Malaya (Malaysia)
Univ. Teknikal Malaysia Melaka (Malaysia)
Muhammad Quisar Bin Lokman, Univ. of Malaya (Malaysia)
Sulaiman Wadi Harun, Univ. of Malaya (Malaysia)
Gabor Louis Hornyak, Asian Institute of Technology (Thailand)
Karel Sterckx, Bangkok Univ. (Thailand)
Waleed Soliman Mohammed, Bangkok Univ. (Thailand)
Joydeep Dutta, KTH Royal Institute of Technology (Sweden)

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