Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김우재 | * |
dc.date.accessioned | 2020-02-07T16:30:21Z | - |
dc.date.available | 2020-02-07T16:30:21Z | - |
dc.date.issued | 2020 | * |
dc.identifier.issn | 0169-4332 | * |
dc.identifier.issn | 1873-5584 | * |
dc.identifier.other | OAK-26346 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/253353 | - |
dc.description.abstract | Gel chromatography methods have successfully achieved separation of metallic (M-) and/or semiconducting (S-) single-walled carbon nanotubes (SWNTs) from their mixtures with high purity. However, the optimum surfactant concentrations for gel chromatography methods are different for high-purity separation of S- and M-SWNTs; therefore, only one of S- or M-SWNTs can be obtained with high purity. In this work, we developed a new gel chromatography method for the simultaneous separation of both high-purity S-SWNTs and high-purity M-SWNTs, by adding steps to optimize surfactant concentrations of the SWNT solution prior to the separation of each SWNT. High-purity S-SWNT with a large diameter was obtained first with a high surfactant concentration (2 wt%), and then the remaining solution's surfactant concentration was lowered to 1.5 wt% by dialysis or dilution to perform consecutive gel chromatography to separate the highly pure S-SWNT with a medium diameter. The remaining solution's surfactant concentration was further lowered to 1 wt% to separate highly pure M-SWNTs. Through this study, we demonstrated that high purity M-SWNTs can be obtained only when all S-SWNTs are successfully separated first. Small-diameter S-SWNTs are least stable in a sodium dodecyl sulfate (SDS) dispersion among SWNTs and can be separated by a gel with a high surfactant concentration (2 wt%), while large-diameter S-SWNTs are more stable in SDS dispersions than small-diameter S-SWNTs and can therefore be separated by gel when the SDS concentration is low (1 wt%). M-SWNTs are most stable in SDS dispersions; therefore, they pass through all columns, are not adsorbed to gels, and can be collected at the end of the process. The optimum concentrations for high-purity separation of each kind of SWNTs were also investigated using their adsorption kinetics and experimental data. | * |
dc.language | English | * |
dc.publisher | ELSEVIER | * |
dc.subject | Metallic SWNTs | * |
dc.subject | Semiconducting SWNTs | * |
dc.subject | High-purity separation | * |
dc.subject | Gel chromatography | * |
dc.subject | Surfactant concentration control | * |
dc.title | Simultaneous separation of high-purity semiconducting and metallic single-walled carbon nanotubes by surfactant concentration-controlled gel chromatography | * |
dc.type | Article | * |
dc.type | Proceedings Paper | * |
dc.relation.volume | 508 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | APPLIED SURFACE SCIENCE | * |
dc.identifier.doi | 10.1016/j.apsusc.2020.145258 | * |
dc.identifier.wosid | WOS:000516818700114 | * |
dc.identifier.scopusid | 2-s2.0-85077387247 | * |
dc.author.google | An, Hyo Jung | * |
dc.author.google | Kim, Soeun | * |
dc.author.google | Seo, Hyerin | * |
dc.author.google | Yoo, Pil J. | * |
dc.author.google | Kim, Woo-Jae | * |
dc.contributor.scopusid | 김우재(34770324900) | * |
dc.date.modifydate | 20240322131035 | * |