Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes

The objective of this work was to develop a pulsed laser ablation technique for the formation of carbon nanotubes (CNTs). This study was divided into three parts. The first part involved the development of pulsed laser ablation (PLA) system. The second part dealt with the growth of CNTs by using...

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Main Author:	Beh, Hoe Guan
Format:	Thesis
Language:	English English
Published:	2006
Subjects:	Pulsed laser deposition.
Online Access:	http://psasir.upm.edu.my/id/eprint/6293/1/FS_2006_31.pdf
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id	my-upm-ir.6293
record_format	uketd_dc
spelling	my-upm-ir.62932023-10-20T08:25:18Z Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes 2006-05 Beh, Hoe Guan The objective of this work was to develop a pulsed laser ablation technique for the formation of carbon nanotubes (CNTs). This study was divided into three parts. The first part involved the development of pulsed laser ablation (PLA) system. The second part dealt with the growth of CNTs by using the pulsed laser ablation technique, and finally the last part dealt with the analysis of microstructure and surface morphology of the deposited sample collected and the influence of the laser ablation on the surface morphology of the sample target. A vacuum chamber was designed for the formation of CNTs. The stainless steel chamber used in this system has a cylindrical shape, with diameter of about 15cm and 45cm length. CNTs were formed by laser ab!ation using a graphite pellet, graphite-Ni, graphite-Co and graphite-Ni-Co, each with 10 weight percentage catalysts. The Nd:YAG laser with 532nrn wavelength, 10.24 W laser power was used to ablate the target to form the CNTs. Argon (Ar) gas was kept flowing into the chamber, keeping the pressure inside chamber at 4 Torr.Web-liked CNTs were found in the deposited sample collected after 30 minutes laser ablation by using the graphite pellet and the graphite filled with mono-catalyst and bi-catalyst. The XRD pattern for the deposited sample shows the CNTs peak located at about 26.5". The SEM micrograph show that the diameter size of the CNTs formed by the Co, Ni, NiCo catalysts and without catalyst follow the order C>CCo>CNi>CNiCo. The range of the diameters of the CNTs was found to be about 35-150nm. The sphere-liked carbon structures were found deposited in the substrate after laser ablation without the Ar gas flowing into the chamber during the ablation process. TEM micrograph confirmed the formation of CNTs. It was found that by using a bi-metal catalyst (Ni-Co), a bamboo-like structure of CNTs was formed. Pulsed laser deposition. 2006-05 Thesis http://psasir.upm.edu.my/id/eprint/6293/ http://psasir.upm.edu.my/id/eprint/6293/1/FS_2006_31.pdf text en public masters Universiti Putra Malaysia Pulsed laser deposition. Science Yahya, Noorhana English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Yahya, Noorhana
topic	Pulsed laser deposition.
spellingShingle	Pulsed laser deposition. Beh, Hoe Guan Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
description	The objective of this work was to develop a pulsed laser ablation technique for the formation of carbon nanotubes (CNTs). This study was divided into three parts. The first part involved the development of pulsed laser ablation (PLA) system. The second part dealt with the growth of CNTs by using the pulsed laser ablation technique, and finally the last part dealt with the analysis of microstructure and surface morphology of the deposited sample collected and the influence of the laser ablation on the surface morphology of the sample target. A vacuum chamber was designed for the formation of CNTs. The stainless steel chamber used in this system has a cylindrical shape, with diameter of about 15cm and 45cm length. CNTs were formed by laser ab!ation using a graphite pellet, graphite-Ni, graphite-Co and graphite-Ni-Co, each with 10 weight percentage catalysts. The Nd:YAG laser with 532nrn wavelength, 10.24 W laser power was used to ablate the target to form the CNTs. Argon (Ar) gas was kept flowing into the chamber, keeping the pressure inside chamber at 4 Torr.Web-liked CNTs were found in the deposited sample collected after 30 minutes laser ablation by using the graphite pellet and the graphite filled with mono-catalyst and bi-catalyst. The XRD pattern for the deposited sample shows the CNTs peak located at about 26.5". The SEM micrograph show that the diameter size of the CNTs formed by the Co, Ni, NiCo catalysts and without catalyst follow the order C>CCo>CNi>CNiCo. The range of the diameters of the CNTs was found to be about 35-150nm. The sphere-liked carbon structures were found deposited in the substrate after laser ablation without the Ar gas flowing into the chamber during the ablation process. TEM micrograph confirmed the formation of CNTs. It was found that by using a bi-metal catalyst (Ni-Co), a bamboo-like structure of CNTs was formed.
format	Thesis
qualification_level	Master's degree
author	Beh, Hoe Guan
author_facet	Beh, Hoe Guan
author_sort	Beh, Hoe Guan
title	Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
title_short	Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
title_full	Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
title_fullStr	Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
title_full_unstemmed	Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes
title_sort	development of a pulsed laser ablation technique for the formation of carbon nanotubes
granting_institution	Universiti Putra Malaysia
granting_department	Science
publishDate	2006
url	http://psasir.upm.edu.my/id/eprint/6293/1/FS_2006_31.pdf
_version_	1783725723007057920

Development of a Pulsed Laser Ablation Technique for the Formation of Carbon Nanotubes

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