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Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii

The presence of metallic single-walled carbon nanotubes (M-SWCNT) in as-prepared single-walled carbon nanotubes (SWCNT) poses a significant hurdle to integrate carbon nanotubes into semiconductor electronics. Here the findings of enriching semiconducting single-walled carbon nanotubes (S-SWCNT) usin...

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Main Author: Malcolm Tang , Siong Yii
Format: Thesis
Published: 2014
Subjects:
Q Science (General)
Online Access:http://studentsrepo.um.edu.my/4838/1/MalcolmTangSiongYii.pdf
http://studentsrepo.um.edu.my/4838/
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spelling my.um.stud.48382015-03-12T06:52:41Z Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii Malcolm Tang , Siong Yii Q Science (General) The presence of metallic single-walled carbon nanotubes (M-SWCNT) in as-prepared single-walled carbon nanotubes (SWCNT) poses a significant hurdle to integrate carbon nanotubes into semiconductor electronics. Here the findings of enriching semiconducting single-walled carbon nanotubes (S-SWCNT) using an aqueous two-phase system (ATPS) is reported. The solution containing as received SWCNT and polyethylene glycol (PEG), dextran, N-methylpyrrolidone (NMP) and water effectively separates into two distinct phases, with S-SWNT dominant in one phase while the M-SWCNT congregates in another phase. The separation process is due to the attraction of amine and S-SWCNT as reported by Chattopadhyay. Micro-Raman spectroscopy and Ultraviolet-Visible spectroscopy results show evidence of the removal of M-SWCNT in one of the phases especially for volume ratio 1:1 experiment. The ratio of M11/S22 in the top phase for VR 1.5 reaches 0.2574 compared to 0.1507 in the bottom phase. This finding presents ATPS as an easy, effective and low-cost purification method of carbon nanotubes. 2014 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/4838/1/MalcolmTangSiongYii.pdf Malcolm Tang , Siong Yii (2014) Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/4838/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic Q Science (General)
spellingShingle Q Science (General)
Malcolm Tang , Siong Yii
Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
description The presence of metallic single-walled carbon nanotubes (M-SWCNT) in as-prepared single-walled carbon nanotubes (SWCNT) poses a significant hurdle to integrate carbon nanotubes into semiconductor electronics. Here the findings of enriching semiconducting single-walled carbon nanotubes (S-SWCNT) using an aqueous two-phase system (ATPS) is reported. The solution containing as received SWCNT and polyethylene glycol (PEG), dextran, N-methylpyrrolidone (NMP) and water effectively separates into two distinct phases, with S-SWNT dominant in one phase while the M-SWCNT congregates in another phase. The separation process is due to the attraction of amine and S-SWCNT as reported by Chattopadhyay. Micro-Raman spectroscopy and Ultraviolet-Visible spectroscopy results show evidence of the removal of M-SWCNT in one of the phases especially for volume ratio 1:1 experiment. The ratio of M11/S22 in the top phase for VR 1.5 reaches 0.2574 compared to 0.1507 in the bottom phase. This finding presents ATPS as an easy, effective and low-cost purification method of carbon nanotubes.
format Thesis
author Malcolm Tang , Siong Yii
author_facet Malcolm Tang , Siong Yii
author_sort Malcolm Tang , Siong Yii
title Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
title_short Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
title_full Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
title_fullStr Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
title_full_unstemmed Separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / Malcolm Tang Siong Yii
title_sort separation of metallic and semiconducting single walled carbon nanotubes using aqueous two-phase technique / malcolm tang siong yii
publishDate 2014
url http://studentsrepo.um.edu.my/4838/1/MalcolmTangSiongYii.pdf
http://studentsrepo.um.edu.my/4838/
_version_ 1738505717140160512
score 13.211869

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