NDLI: Low-cost fiber optic HS gas sensor

Content Provider	IEEE Xplore Digital Library
Author	Neri, A. Parvis, M. Perrone, G. Grassini, S. Angelini, E. Mombello, D.
Copyright Year	2008
Description	Author affiliation: Dept. of Electron., Politec. di Torino, Torino (Neri, A.; Parvis, M.; Perrone, G.) \|\| Dept. of Mater. Sci. & Chem. Eng., Politec. di Torino, Torino (Grassini, S.; Angelini, E.; Mombello, D.)
Abstract	In this paper the realization and characterization of a new plastic optical fiber sensor for the detection of $H_{2}S$ and other sulfide compounds is described. The sensor is specifically tailored for applications in cultural heritage preservation, where the capability to evaluate the total exposure even to small quantities of pollutants is required. The substitution of plastic for glass optical fibers accounts for the possibility of having all the advantages of a fiber-based device, while lowering the cost of the final device and furthermore improving the sensitivity for evanescent field sensing. The transducer exploits the variation of the optical absorption of Ag when exposed to the sulfide atmosphere and is fabricated by a preliminary chemical etching of the cladding in ethyl-acetate, followed by deposition of the Ag thin film by plasma sputtering. Some sensors prototypes have been developed and tested in a climatic chamber to assess their response in the presence of sulfide vapors. In addition chemical and morphological characterization of the plastic fibers have been carried out by means of infrared spectroscopy and scanning electron microscopy. The prototypes exposed to $H_{2}S$ have shown a very fast response achieving a 90% decay in the transmitted power in 900 seconds upon exposure to a 0.1 M $H_{2}S$ solution; such a decay has been found to be nearly wavelength independent, and is correlated to the transformation of the metallic Ag into $Ag_{2}S.$
Starting Page	313
Ending Page	316
File Size	487003
Page Count	4
File Format	PDF
ISBN	9781424425808
ISSN	19300395
DOI	10.1109/ICSENS.2008.4716444
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fibers Plastics Optical fiber sensors Sensor phenomena and characterization Chemical transducers Optical films Sputtering Prototypes Cultural differences Pollution
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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