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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 21, Number 4 (2009)
Copyright(C) MYU K.K.
pp. 179-189
S&M758 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2009.591
Published: July 21, 2009

Nanoassembled Thin-Film Gas Sensor II. An Intrinsic Highly Sensitive Fibre Optic Sensor for Ammonia Detection [PDF]

Sergiy Korposh, Suguru Kodaira, William Batty, Stephen W. James and Seung-Woo Lee

(Received January 27, 2009; Accepted April 23, 2009)

Keywords: fibre optic sensor, evanescent wave, layer-by-layer adsorption, porphyrin, ammonia

A layer-by-layer approach was used for the deposition of coatings with a nanometre thickness onto a multimode optical fibre, from which the cladding had been removed, with the aim of realizing a fibre optic ammonia sensor. The film was self-assembled with alternate layers of tetrakis-(4-sulfophenyl) porphine (TSPP) and poly(diallyldimethylammonium chloride) (PDDA). The exposure of the assembled film to ammonia induced optical changes in the transmission spectrum of the coated optical fibre, reflecting the characteristic absorption bands (Soret and Q bands) of the assembled TSPP compound. The fibre optic sensor showed a linear sensitivity to ammonia in the concentration range of 0.1–20 ppm and the response and recovery times were less than 3 min with a limit of detection of 0.9 ppm at 706 nm.

Corresponding author: Seung-Woo Lee


Cite this article
Sergiy Korposh, Suguru Kodaira, William Batty, Stephen W. James and Seung-Woo Lee, Nanoassembled Thin-Film Gas Sensor II. An Intrinsic Highly Sensitive Fibre Optic Sensor for Ammonia Detection, Sens. Mater., Vol. 21, No. 4, 2009, p. 179-189.



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