eprintid: 5390
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/53/90
datestamp: 2023-11-09 16:17:07
lastmod: 2023-11-09 16:17:07
status_changed: 2023-11-09 16:01:30
type: article
metadata_visibility: show
creators_name: Mohamed Saheed, M.S.
creators_name: Mohamed, N.M.
creators_name: Burhanudin, Z.A.
title: Effect of different catalyst deposition technique on aligned multiwalled carbon nanotubes grown by thermal chemical vapor deposition
ispublished: pub
keywords: Alumina; Catalyst deactivation; Chemical vapor deposition; Deposition; Ethylene; Iron; Multiwalled carbon nanotubes (MWCN); Organometallics; Vaporization, Catalyst deposition; Catalyst particles; Electron beam evaporation; Hydrocarbon gas; Silicon substrates; Substrate preparation; Thermal chemical vapor deposition; Vertically aligned, Vapors
note: cited By 10
abstract: The paper reported the investigation of the substrate preparation technique involving deposition of iron catalyst by electron beam evaporation and ferrocene vaporization in order to produce vertically aligned multiwalled carbon nanotubes array needed for fabrication of tailored devices. Prior to the growth at 700°C in ethylene, silicon dioxide coated silicon substrate was prepared by depositing alumina followed by iron using two different methods as described earlier. Characterization analysis revealed that aligned multiwalled carbon nanotubes array of 107.9 μm thickness grown by thermal chemical vapor deposition technique can only be achieved for the sample with iron deposited using ferrocene vaporization. The thick layer of partially oxidized iron film can prevent the deactivation of catalyst and thus is able to sustain the growth. It also increases the rate of permeation of the hydrocarbon gas into the catalyst particles and prevents agglomeration at the growth temperature. Combination of alumina-iron layer provides an efficient growth of high density multiwalled carbon nanotubes array with the steady growth rate of 3.6 μm per minute for the first 12 minutes and dropped by half after 40 minutes. Thicker and uniform iron catalyst film obtained from ferrocene vaporization is attributed to the multidirectional deposition of particles in the gaseous form. © 2014 Mohamed Shuaib Mohamed Saheed et al.
date: 2014
publisher: Hindawi Publishing Corporation
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899654848&doi=10.1155%2f2014%2f707301&partnerID=40&md5=711468f87d84d6da0090cd91ece7d091
id_number: 10.1155/2014/707301
full_text_status: none
publication: Journal of Nanomaterials
volume: 2014
refereed: TRUE
issn: 16874110
citation:   Mohamed Saheed, M.S. and Mohamed, N.M. and Burhanudin, Z.A.  (2014) Effect of different catalyst deposition technique on aligned multiwalled carbon nanotubes grown by thermal chemical vapor deposition.  Journal of Nanomaterials, 2014.   ISSN 16874110