Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer

Optical fiber sensors have been gaining popularity on a wide scale over the past two decades as the call for highly efficient, miniaturised and versatile sensing devices are rapidly becoming a necessity. This research focused on the design and analysis of a standard multi-mode fiber optic to be u...

Full description

Saved in:

Bibliographic Details
Main Author:	Ali, Ali Mohammed
Format:	Thesis
Language:	English
Published:	2017
Subjects:	Optical fiber detectors - Design and construction - Research Nanocomposites (Materials)
Online Access:	http://psasir.upm.edu.my/id/eprint/71207/1/FK%202017%2071%20-%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.71207
record_format	uketd_dc
spelling	my-upm-ir.712072019-08-29T08:34:55Z Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer 2017-08 Ali, Ali Mohammed Optical fiber sensors have been gaining popularity on a wide scale over the past two decades as the call for highly efficient, miniaturised and versatile sensing devices are rapidly becoming a necessity. This research focused on the design and analysis of a standard multi-mode fiber optic to be used as a sensor for the detection of aqueous ethanol. Using multi-mode fiber optic (MMF) sensor in the process of detecting liquid required a process to amend the fiber by mode of tapering in order to increase the effectiveness of the sensor for sensing. The focus of this project is to increase the evanescent waves of the sensor and to increase the absorption rate and sensitivity of the sensor. It was done by using Au (gold) and Pd (palladium) as the nanocomposite coating layer. In this thesis, the effect of Au layer on the fiber, Pd layer on the fiber and the combination of both of Au and Pd as a nanocomposite are investigated for the sensor performance. Au and Pd have emerged as leading materials in a wide variety of applications, including chemical sensors, due to their exceptional thermal, optical and mechanicalproperties. The combination of Au and Pd are able to enhance the chemical reaction with ethanol, resulting in sensing capability of the sensor. Moreover, increments of the sensitivity were observed by coating a nanocomposite layer of the Au and Pd on the tapered fiber. The study dealt with five sensors with different coating ratios. The first sensor was coated by nanocomposite layer of Au and Pd with ratio 2 to 1 respectively. The second sensor was coated with a compound of 1 to 0.7 ratio of Au to Pd. The third sensor was coated with 1 to 1 ratio of the compound Au and Pd respectively. The fourth sensor is coated by 1 to 2 ratio of Au to Pd. The last sensor was coated with Au and Pd ratio of 1 to 3 respectively. All the nanoparticle layer were deposited on the tapering region using drop casting technique, after the sensors were annealed at 70C. The developed sensors demonstrated high sensitivity at 0.074/vol % and response and recovery times of approximately 13 and 9 seconds, respectively. The achievements of this study are to use a large diameter tapered as a sensitive sensor toward ethanol and to apply Au and Pd mixture to tapered fiber toward ethanol detection. Optical fiber detectors - Design and construction - Research Nanocomposites (Materials) 2017-08 Thesis http://psasir.upm.edu.my/id/eprint/71207/ http://psasir.upm.edu.my/id/eprint/71207/1/FK%202017%2071%20-%20IR.pdf text en public masters Universiti Putra Malaysia Optical fiber detectors - Design and construction - Research Nanocomposites (Materials)
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Optical fiber detectors - Design and construction - Research Nanocomposites (Materials)
spellingShingle	Optical fiber detectors - Design and construction - Research Nanocomposites (Materials) Ali, Ali Mohammed Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
description	Optical fiber sensors have been gaining popularity on a wide scale over the past two decades as the call for highly efficient, miniaturised and versatile sensing devices are rapidly becoming a necessity. This research focused on the design and analysis of a standard multi-mode fiber optic to be used as a sensor for the detection of aqueous ethanol. Using multi-mode fiber optic (MMF) sensor in the process of detecting liquid required a process to amend the fiber by mode of tapering in order to increase the effectiveness of the sensor for sensing. The focus of this project is to increase the evanescent waves of the sensor and to increase the absorption rate and sensitivity of the sensor. It was done by using Au (gold) and Pd (palladium) as the nanocomposite coating layer. In this thesis, the effect of Au layer on the fiber, Pd layer on the fiber and the combination of both of Au and Pd as a nanocomposite are investigated for the sensor performance. Au and Pd have emerged as leading materials in a wide variety of applications, including chemical sensors, due to their exceptional thermal, optical and mechanicalproperties. The combination of Au and Pd are able to enhance the chemical reaction with ethanol, resulting in sensing capability of the sensor. Moreover, increments of the sensitivity were observed by coating a nanocomposite layer of the Au and Pd on the tapered fiber. The study dealt with five sensors with different coating ratios. The first sensor was coated by nanocomposite layer of Au and Pd with ratio 2 to 1 respectively. The second sensor was coated with a compound of 1 to 0.7 ratio of Au to Pd. The third sensor was coated with 1 to 1 ratio of the compound Au and Pd respectively. The fourth sensor is coated by 1 to 2 ratio of Au to Pd. The last sensor was coated with Au and Pd ratio of 1 to 3 respectively. All the nanoparticle layer were deposited on the tapering region using drop casting technique, after the sensors were annealed at 70C. The developed sensors demonstrated high sensitivity at 0.074/vol % and response and recovery times of approximately 13 and 9 seconds, respectively. The achievements of this study are to use a large diameter tapered as a sensitive sensor toward ethanol and to apply Au and Pd mixture to tapered fiber toward ethanol detection.
format	Thesis
qualification_level	Master's degree
author	Ali, Ali Mohammed
author_facet	Ali, Ali Mohammed
author_sort	Ali, Ali Mohammed
title	Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
title_short	Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
title_full	Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
title_fullStr	Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
title_full_unstemmed	Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
title_sort	development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer
granting_institution	Universiti Putra Malaysia
publishDate	2017
url	http://psasir.upm.edu.my/id/eprint/71207/1/FK%202017%2071%20-%20IR.pdf
_version_	1747812991535939584

Development of multimode fiber optic-based ethanol sensor using nanocomposite sensitive layer

Similar Items