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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| Format: | Article |
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Elsevier
2014
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| _version_ | 1825720271159427072 |
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| 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. |
| collection | UM |
| 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. |
| first_indexed | 2024-03-06T05:32:35Z |
| format | Article |
| id | um.eprints-12981 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:32:35Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-129812015-03-10T05:48:29Z http://eprints.um.edu.my/12981/ 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 Tang, M.S.Y. and Show, P.L. and Lin, Y.K. and Woon, K.L. and Tan, C.P. and Ling, T.C. (2014) Separation of single-walled carbon nanotubes using aqueous two-phase system. Separation and Purification Technology, 125. pp. 136-141. ISSN 1383-5866, DOI https://doi.org/10.1016/j.seppur.2014.01.044 <https://doi.org/10.1016/j.seppur.2014.01.044>. http://www.sciencedirect.com/science/article/pii/S138358661400077X http://dx.doi.org/10.1016/j.seppur.2014.01.044 |
| 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 |
| title | 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_short | Separation of single-walled carbon nanotubes using aqueous two-phase system |
| title_sort | separation of single walled carbon nanotubes using aqueous two phase system |
| topic | Q Science (General) QC Physics |
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