Development of transparent and flexible graphene coated electrode

Conductive graphene coated film of rubber silicone polymer was prepared using the facile and simple spin coating technique. Graphene coated films have been studied tremendously worldwide and attracted much attention as they have great potential in flexible optoelectronic applications. Traditionally,...

Full description

Saved in:

Bibliographic Details
Main Author:	Ismail, Nur Suhaili
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/78878/1/NurSuhailiIsmailMFKM2017.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.78878
record_format	uketd_dc
spelling	my-utm-ep.788782018-09-17T07:15:52Z Development of transparent and flexible graphene coated electrode 2017 Ismail, Nur Suhaili TJ Mechanical engineering and machinery Conductive graphene coated film of rubber silicone polymer was prepared using the facile and simple spin coating technique. Graphene coated films have been studied tremendously worldwide and attracted much attention as they have great potential in flexible optoelectronic applications. Traditionally, Indium Tin Oxide (ITO) have been used for decades as electrodes but high mechanical brittleness of ITO makes it unsuitable for flexible devices. Thus, studies on finding the alternatives for ITO increase by time. In this present work, rubber silicone polymer was used as substrate due to its high transparency and flexibility while graphene was used as coating layer as it has great properties. The main aims of this project include to develop high conductivity electrode together with optimum aforementioned properties. Deposition of graphene solution was varied from 1 to 8 drop. Several parameters were used; dispersion duration (1 & 2.5 hours) and coating speed (500 & 1000rpm) obtain the best sample. Longer sonication time produced better dispersed graphene while lower coating speed resulted in better scattered graphene coating. In the present work, Sample 3 with 3 drops of graphene solution was found to have the best properties among all. Conductivity was set to be the most important property, hence was set as the first screening. The highest current value recorded was 0.2 x 102 A at V=10 meanwhile for flexibility test, current value dropped by 100 times as resistivity increased. As drop number increased, the deposition of graphene on substrate increased causing the formation of graphite from graphene. This resulted in very low conductivity for Sample 6, 7, and 8 with current value ~1 x 10-9A which closed to reference sample with current value ~1 x 1010A. However, results obtained are respectively low compared to electrical properties of graphene from literature which will be further discussed in this report. Optical microscope image shows the presence of graphene but agglomeration was spotted on the substrate which explains the low current value in most samples. 2017 Thesis http://eprints.utm.my/id/eprint/78878/ http://eprints.utm.my/id/eprint/78878/1/NurSuhailiIsmailMFKM2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:107066 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ismail, Nur Suhaili Development of transparent and flexible graphene coated electrode
description	Conductive graphene coated film of rubber silicone polymer was prepared using the facile and simple spin coating technique. Graphene coated films have been studied tremendously worldwide and attracted much attention as they have great potential in flexible optoelectronic applications. Traditionally, Indium Tin Oxide (ITO) have been used for decades as electrodes but high mechanical brittleness of ITO makes it unsuitable for flexible devices. Thus, studies on finding the alternatives for ITO increase by time. In this present work, rubber silicone polymer was used as substrate due to its high transparency and flexibility while graphene was used as coating layer as it has great properties. The main aims of this project include to develop high conductivity electrode together with optimum aforementioned properties. Deposition of graphene solution was varied from 1 to 8 drop. Several parameters were used; dispersion duration (1 & 2.5 hours) and coating speed (500 & 1000rpm) obtain the best sample. Longer sonication time produced better dispersed graphene while lower coating speed resulted in better scattered graphene coating. In the present work, Sample 3 with 3 drops of graphene solution was found to have the best properties among all. Conductivity was set to be the most important property, hence was set as the first screening. The highest current value recorded was 0.2 x 102 A at V=10 meanwhile for flexibility test, current value dropped by 100 times as resistivity increased. As drop number increased, the deposition of graphene on substrate increased causing the formation of graphite from graphene. This resulted in very low conductivity for Sample 6, 7, and 8 with current value ~1 x 10-9A which closed to reference sample with current value ~1 x 1010A. However, results obtained are respectively low compared to electrical properties of graphene from literature which will be further discussed in this report. Optical microscope image shows the presence of graphene but agglomeration was spotted on the substrate which explains the low current value in most samples.
format	Thesis
qualification_level	Master's degree
author	Ismail, Nur Suhaili
author_facet	Ismail, Nur Suhaili
author_sort	Ismail, Nur Suhaili
title	Development of transparent and flexible graphene coated electrode
title_short	Development of transparent and flexible graphene coated electrode
title_full	Development of transparent and flexible graphene coated electrode
title_fullStr	Development of transparent and flexible graphene coated electrode
title_full_unstemmed	Development of transparent and flexible graphene coated electrode
title_sort	development of transparent and flexible graphene coated electrode
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/78878/1/NurSuhailiIsmailMFKM2017.pdf
_version_	1747818093583794176

Development of transparent and flexible graphene coated electrode

Similar Items