Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/3940
Title: Growth and characterization of carbon nanotubes by thernal chemical vapor deposition method
Authors: Selamet, Yusuf
Aksak, Meral
Issue Date: 2008
Publisher: Izmir Institute of Technology
Izmir Institute of Technology
Abstract: This thesis work is focused on producing carbon nanotubes (CNTs) by methane gas thermal chemical vapor deposition method on very thin Cobalt, Iron, and Nickel catalyst thin films deposited onto SiO2/Si substrates by DC magnetron sputtering. This thesis is also devoted to understanding some parameters affecting the growth of CNTs; such as catalyst material, temperature, and catalyst layer thickness effects In this study, CNT growth was performed on directly Si substrates, which was observed that the growth was too difficult and requiring very high temperatures. Hence, very thin catalyst films were deposited on SiO2/Si substrates, and the CNT growth was observed. The temperature effect was also examined. When the growth temperature was increased, the average diameters of the CNTs were decreased up to a critical temperature, but after this point the average diameter of CNTs were increased. This effect was studied systematically by utilizing Fe and Co catalyst thin films and with the help of Raman spectroscopy and Scanning Electron Microscopy results.Catalyst thickness effect was also examined. For this aim, Ni catalyst thin films with three different thicknesses; 0.7 nm, 1.4 nm, and 6 nm, were utilized. It was observed that CNTs were grown well on 0.7 and 1.4 nm thick Ni films, while there was a little growth on 6 nm thick Ni film. The roughness analysis of 0.7 nm and 1.4 nm thick Ni films were also done. Some of as-grown CNTs were also examined by X-ray diffraction method, and the results were compared one another.
Description: Thesis (Master)--Izmir Institute of Technology, Physics, Izmir, 2008
Includes bibliographical references (leaves: 53-61)
Text in English; Abstract: Turkish and English
xi, 61 leaves
URI: http://hdl.handle.net/11147/3940
Appears in Collections:Master Degree / YĆ¼ksek Lisans Tezleri

Files in This Item:
File Description SizeFormat 
T000721.pdfMasterThesis7.97 MBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

Page view(s)

36
checked on May 23, 2022

Download(s)

12
checked on May 23, 2022

Google ScholarTM

Check


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.