Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure

Accurate monitoring of concentration changes in saline solution is prerequisite to control and minimize the negative effect of salt in water resources. A highly sensitive refractive index (RI) sensor is fabricated via coating a novel zinc oxide/silver (ZnO/Ag) bi-layer having different ZnO nanostruc...

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Main Authors: Samavati, Z., Samavati, A., Fauzi Ismail, A., Yahya, N., Rahman, M.A., Hafiz Dzarfan Othman, M.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23753 /
Published: Elsevier Ltd 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096381528&doi=10.1016%2fj.optlastec.2020.106722&partnerID=40&md5=f5f5db1983f81b4ef06a91eb7cd6b508
http://eprints.utp.edu.my/23753/
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spelling utp-eprints.237532021-08-19T10:01:56Z Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure Samavati, Z. Samavati, A. Fauzi Ismail, A. Yahya, N. Rahman, M.A. Hafiz Dzarfan Othman, M. Accurate monitoring of concentration changes in saline solution is prerequisite to control and minimize the negative effect of salt in water resources. A highly sensitive refractive index (RI) sensor is fabricated via coating a novel zinc oxide/silver (ZnO/Ag) bi-layer having different ZnO nanostructure shapes as an outer layer on partially unclad silica fiber. When the ZnO layer contact to different saline concentrations, its band-gap is altered and modifies the RI of the ZnO layer. The coupling of the evanescent light with surface plasmon resonance (SPR) wave and absorption of evanescent light by the external medium are responsible for observing wavelength shift and intensity changes in the detected spectrum. For vertically oriented ZnO nanorods sample when IR light is used as a light source, by increasing the saline concentration from 0 to 20, the wavelength is shifted from 1564.4 nm to 1573.3 nm and the intensity is dropped to 77 of its maximum value. The superior sensitivity obtained for vertically oriented ZnO sample is attributed to the larger surface area, higher average dispersion relation, better crystallinity, larger surface roughness and greater adhesion (interaction) with salt molecules compare to the other samples. The experimentally demonstrated highest intensity and wavelength sensitivity are 36 dB/RIU and 255 nm/RIU respectively. © 2020 Elsevier Ltd Elsevier Ltd 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096381528&doi=10.1016%2fj.optlastec.2020.106722&partnerID=40&md5=f5f5db1983f81b4ef06a91eb7cd6b508 Samavati, Z. and Samavati, A. and Fauzi Ismail, A. and Yahya, N. and Rahman, M.A. and Hafiz Dzarfan Othman, M. (2021) Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure. Optics and Laser Technology, 136 . http://eprints.utp.edu.my/23753/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Accurate monitoring of concentration changes in saline solution is prerequisite to control and minimize the negative effect of salt in water resources. A highly sensitive refractive index (RI) sensor is fabricated via coating a novel zinc oxide/silver (ZnO/Ag) bi-layer having different ZnO nanostructure shapes as an outer layer on partially unclad silica fiber. When the ZnO layer contact to different saline concentrations, its band-gap is altered and modifies the RI of the ZnO layer. The coupling of the evanescent light with surface plasmon resonance (SPR) wave and absorption of evanescent light by the external medium are responsible for observing wavelength shift and intensity changes in the detected spectrum. For vertically oriented ZnO nanorods sample when IR light is used as a light source, by increasing the saline concentration from 0 to 20, the wavelength is shifted from 1564.4 nm to 1573.3 nm and the intensity is dropped to 77 of its maximum value. The superior sensitivity obtained for vertically oriented ZnO sample is attributed to the larger surface area, higher average dispersion relation, better crystallinity, larger surface roughness and greater adhesion (interaction) with salt molecules compare to the other samples. The experimentally demonstrated highest intensity and wavelength sensitivity are 36 dB/RIU and 255 nm/RIU respectively. © 2020 Elsevier Ltd
format Article
author Samavati, Z.
Samavati, A.
Fauzi Ismail, A.
Yahya, N.
Rahman, M.A.
Hafiz Dzarfan Othman, M.
spellingShingle Samavati, Z.
Samavati, A.
Fauzi Ismail, A.
Yahya, N.
Rahman, M.A.
Hafiz Dzarfan Othman, M.
Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
author_sort Samavati, Z.
title Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
title_short Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
title_full Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
title_fullStr Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
title_full_unstemmed Role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with ZnO/Ag nano-heterostructure
title_sort role of outer layer configuration on saline concentration sensitivity of optical fiber probe coated with zno/ag nano-heterostructure
publisher Elsevier Ltd
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096381528&doi=10.1016%2fj.optlastec.2020.106722&partnerID=40&md5=f5f5db1983f81b4ef06a91eb7cd6b508
http://eprints.utp.edu.my/23753/
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score 11.62408

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