Separation of single-walled carbon nanotubes using aqueous two-phase system

The separation of metallic single-walled carbon nanotubes (M-SWCNTs) from semiconducting single-walled carbon nanotubes (S-SWCNTs) in as-received SWCNTs is an important step to integrate carbon nanotubes into electronic applications. In this study, the effect of molecular weight (Mw) of polyethylene...

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Main Authors:	Tang, M.S.Y., Show, P.L., Lin, Y.K., Woon, K.L., Tan, C.P., Ling, T.C.
Format:	Article
Published:	Elsevier 2014
Subjects:	Q Science (General) QC Physics
Online Access:	http://www.sciencedirect.com/science/article/pii/S138358661400077X http://www.sciencedirect.com/science/article/pii/S138358661400077X

id	um-12981
recordtype	eprints
spelling	um-129812015-03-10T05:48:29Z Separation of single-walled carbon nanotubes using aqueous two-phase system Tang, M.S.Y. Show, P.L. Lin, Y.K. Woon, K.L. Tan, C.P. Ling, T.C. Q Science (General) QC Physics The separation of metallic single-walled carbon nanotubes (M-SWCNTs) from semiconducting single-walled carbon nanotubes (S-SWCNTs) in as-received SWCNTs is an important step to integrate carbon nanotubes into electronic applications. In this study, the effect of molecular weight (Mw) of polyethylene glycol (PEG) on the separation of M-SWCNTs from as-received SWCNTs using aqueous two-phase system (ATPS) consist of PEG, dextran, organic solvent N-methylpyrrolidone (NMP) and water has been investigated. PEG with Mw 6000 and 10,000 showed higher partition coefficient (K) and yield (Y). The semiconducting single-walled carbon nanotube (S-SWCNT) was attracted to the bottom phase. Varying the concentration of PEG 6000 and dextran could enrich the purity of M-SWCNT in the top phase to 0.2574 compared to the pristine value of 0.1506. The volume ratio (VR) that gave the highest enrichment of M-SWCNT is found to be 1.5. However, there was no significant changes in purification factor (PF) and purity when the concentration of NMP and water were manipulated. This finding provides a solid foundation for the studies of ATPS to separate different species of SWCNTs. Elsevier 2014-04-07 Article PeerReviewed http://www.sciencedirect.com/science/article/pii/S138358661400077X Tang, M.S.Y.; Show, P.L.; Lin, Y.K.; Woon, K.L.; Tan, C.P.; Ling, T.C. (2014) Separation of single-walled carbon nanotubes using aqueous two-phase system. Separation and Purification Technology <http://eprints.um.edu.my/view/publication/Separation_and_Purification_Technology.html>, 125. pp. 136-141. ISSN 1383-5866 http://eprints.um.edu.my/12981/
repository_type	Digital Repository
institution_category	Local University
institution	University Malaya
building	UM Research Repository
collection	Online Access
topic	Q Science (General) QC Physics
spellingShingle	Q Science (General) QC Physics Tang, M.S.Y. Show, P.L. Lin, Y.K. Woon, K.L. Tan, C.P. Ling, T.C. Separation of single-walled carbon nanotubes using aqueous two-phase system
description	The separation of metallic single-walled carbon nanotubes (M-SWCNTs) from semiconducting single-walled carbon nanotubes (S-SWCNTs) in as-received SWCNTs is an important step to integrate carbon nanotubes into electronic applications. In this study, the effect of molecular weight (Mw) of polyethylene glycol (PEG) on the separation of M-SWCNTs from as-received SWCNTs using aqueous two-phase system (ATPS) consist of PEG, dextran, organic solvent N-methylpyrrolidone (NMP) and water has been investigated. PEG with Mw 6000 and 10,000 showed higher partition coefficient (K) and yield (Y). The semiconducting single-walled carbon nanotube (S-SWCNT) was attracted to the bottom phase. Varying the concentration of PEG 6000 and dextran could enrich the purity of M-SWCNT in the top phase to 0.2574 compared to the pristine value of 0.1506. The volume ratio (VR) that gave the highest enrichment of M-SWCNT is found to be 1.5. However, there was no significant changes in purification factor (PF) and purity when the concentration of NMP and water were manipulated. This finding provides a solid foundation for the studies of ATPS to separate different species of SWCNTs.
format	Article
author	Tang, M.S.Y. Show, P.L. Lin, Y.K. Woon, K.L. Tan, C.P. Ling, T.C.
author_facet	Tang, M.S.Y. Show, P.L. Lin, Y.K. Woon, K.L. Tan, C.P. Ling, T.C.
author_sort	Tang, M.S.Y.
title	Separation of single-walled carbon nanotubes using aqueous two-phase system
title_short	Separation of single-walled carbon nanotubes using aqueous two-phase system
title_full	Separation of single-walled carbon nanotubes using aqueous two-phase system
title_fullStr	Separation of single-walled carbon nanotubes using aqueous two-phase system
title_full_unstemmed	Separation of single-walled carbon nanotubes using aqueous two-phase system
title_sort	separation of single-walled carbon nanotubes using aqueous two-phase system
publisher	Elsevier
publishDate	2014
url	http://www.sciencedirect.com/science/article/pii/S138358661400077X http://www.sciencedirect.com/science/article/pii/S138358661400077X
first_indexed	2018-09-06T06:10:30Z
last_indexed	2018-09-06T06:10:30Z
_version_	1610837373333012480

Separation of single-walled carbon nanotubes using aqueous two-phase system

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