Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications

Tungsten disulphide (WS<sub>2</sub>) is a two-dimensional transition-metal dichalcogenide material that can be used to improve the sensitivity of a variety of sensing applications. This study investigated the effect of WS<sub>2</sub> coating on tapered region microfiber (MF)...

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Autores principales:	Norazida Ali, Saaidal Razalli Azzuhri, Md Ashadi Md Johari, Haroon Rashid, Muhammad Imran Mustafa Abdul Khudus, Mohd. Zulhakimi Ab. Razak, Zhe Chen, Norbahiah Misran, Norhana Arsad
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	tapered microfiber humidity sensor transition-metal dichalcogenide tungsten disulphide (WS<sub>2</sub>) Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/196a21e24f0744b28e256fd1fce2787e
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id	oai:doaj.org-article:196a21e24f0744b28e256fd1fce2787e
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spelling	oai:doaj.org-article:196a21e24f0744b28e256fd1fce2787e2021-11-11T19:08:06ZEffects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications10.3390/s212171321424-8220https://doaj.org/article/196a21e24f0744b28e256fd1fce2787e2021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7132https://doaj.org/toc/1424-8220Tungsten disulphide (WS<sub>2</sub>) is a two-dimensional transition-metal dichalcogenide material that can be used to improve the sensitivity of a variety of sensing applications. This study investigated the effect of WS<sub>2</sub> coating on tapered region microfiber (MF) for relative humidity (RH) sensing applications. The flame brushing technique was used to taper the standard single-mode fiber (SMF) into three different waist diameter sizes of MF 2, 5, and 10 µm, respectively. The MFs were then coated with WS<sub>2</sub> via a facile deposition method called the drop-casting technique. Since the MF had a strong evanescent field that allowed fast near-field interaction between the guided light and the environment, depositing WS<sub>2</sub> onto the tapered region produced high humidity sensor sensitivity. The experiments were repeated three times to measure the average transmitted power, presenting repeatability and sensing stability. Each MF sample size was tested with varying humidity levels. Furthermore, the coated and non-coated MF performances were compared in the RH range of 45–90% RH at room temperature. It was found that the WS<sub>2</sub> coating on 2 µm MF had a high sensitivity of 0.0861 dB/% RH with linearity over 99%. Thus, MF coated with WS<sub>2</sub> encourages enhancement in the evanescent field effect in optical fiber humidity sensor applications.Norazida AliSaaidal Razalli AzzuhriMd Ashadi Md JohariHaroon RashidMuhammad Imran Mustafa Abdul KhudusMohd. Zulhakimi Ab. RazakZhe ChenNorbahiah MisranNorhana ArsadMDPI AGarticletapered microfiberhumidity sensortransition-metal dichalcogenidetungsten disulphide (WS<sub>2</sub>)Chemical technologyTP1-1185ENSensors, Vol 21, Iss 7132, p 7132 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tapered microfiber humidity sensor transition-metal dichalcogenide tungsten disulphide (WS<sub>2</sub>) Chemical technology TP1-1185
spellingShingle	tapered microfiber humidity sensor transition-metal dichalcogenide tungsten disulphide (WS<sub>2</sub>) Chemical technology TP1-1185 Norazida Ali Saaidal Razalli Azzuhri Md Ashadi Md Johari Haroon Rashid Muhammad Imran Mustafa Abdul Khudus Mohd. Zulhakimi Ab. Razak Zhe Chen Norbahiah Misran Norhana Arsad Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
description	Tungsten disulphide (WS<sub>2</sub>) is a two-dimensional transition-metal dichalcogenide material that can be used to improve the sensitivity of a variety of sensing applications. This study investigated the effect of WS<sub>2</sub> coating on tapered region microfiber (MF) for relative humidity (RH) sensing applications. The flame brushing technique was used to taper the standard single-mode fiber (SMF) into three different waist diameter sizes of MF 2, 5, and 10 µm, respectively. The MFs were then coated with WS<sub>2</sub> via a facile deposition method called the drop-casting technique. Since the MF had a strong evanescent field that allowed fast near-field interaction between the guided light and the environment, depositing WS<sub>2</sub> onto the tapered region produced high humidity sensor sensitivity. The experiments were repeated three times to measure the average transmitted power, presenting repeatability and sensing stability. Each MF sample size was tested with varying humidity levels. Furthermore, the coated and non-coated MF performances were compared in the RH range of 45–90% RH at room temperature. It was found that the WS<sub>2</sub> coating on 2 µm MF had a high sensitivity of 0.0861 dB/% RH with linearity over 99%. Thus, MF coated with WS<sub>2</sub> encourages enhancement in the evanescent field effect in optical fiber humidity sensor applications.
format	article
author	Norazida Ali Saaidal Razalli Azzuhri Md Ashadi Md Johari Haroon Rashid Muhammad Imran Mustafa Abdul Khudus Mohd. Zulhakimi Ab. Razak Zhe Chen Norbahiah Misran Norhana Arsad
author_facet	Norazida Ali Saaidal Razalli Azzuhri Md Ashadi Md Johari Haroon Rashid Muhammad Imran Mustafa Abdul Khudus Mohd. Zulhakimi Ab. Razak Zhe Chen Norbahiah Misran Norhana Arsad
author_sort	Norazida Ali
title	Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
title_short	Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
title_full	Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
title_fullStr	Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
title_full_unstemmed	Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications
title_sort	effects of tungsten disulphide coating on tapered microfiber for relative humidity sensing applications
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/196a21e24f0744b28e256fd1fce2787e
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Effects of Tungsten Disulphide Coating on Tapered Microfiber for Relative Humidity Sensing Applications

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