Density Gradient Ultracentrifugation of Nanotubes: Interplay of Bundling and Surfactants Encapsulation
文献类型：期刊论文
| ; | |
| 作者 | Bonaccorso; F (Bonaccorso; F.); Hasan; T (Hasan; T.); Tan PH (Tan P. H.); Sciascia; C (Sciascia; C.) |
| 刊名 | journal of physical chemistry c
 ; JOURNAL OF PHYSICAL CHEMISTRY C
|
| 出版日期 | 2010 ; 2010 |
| 卷号 | 114期号:41页码:17267-17285 |
| 关键词 | WALLED CARBON NANOTUBES Walled Carbon Nanotubes Sodium Dodecyl-sulfate Bile-salt Micelles Exciton Energy-transfer Co-mo Catalysts Raman-spectroscopy Optical-properties Absorption-spectroscopy Sedimentation Analysis Ultrafast Photonics SODIUM DODECYL-SULFATE BILE-SALT MICELLES EXCITON ENERGY-TRANSFER CO-MO CATALYSTS RAMAN-SPECTROSCOPY OPTICAL-PROPERTIES ABSORPTION-SPECTROSCOPY SEDIMENTATION ANALYSIS ULTRAFAST PHOTONICS |
| 通讯作者 | ferrari, ac, univ cambridge, dept engn, cambridge cb3 0fa, england. 电子邮箱地址: acf26@eng.cam.ac.uk |
| 合作状况 | 国际 |
| 英文摘要 | density gradient ultracentrifugation (dgu) has emerged as a promising tool to prepare chirality enriched nanotube samples. here, we assess the performance of different surfactants for dgu. bile salts (e.g., sodium cholate (sc), sodium deoxycholate (sdc), and sodium taurodeoxycholate (tdc)) are more effective in individualizing single wall carbon nanotubes (swnts) compared to linear chain surfactants (e.g., sodium dodecylbenzene sulfonate (sdbs) and sodium dodecylsulfate (sds)) and better suited for dgu. using sc, a narrower diameter distribution (0.69-0.81 nm) is achieved through a single dgu step on comocat tubes, when compared to sdc and tdc (0.69-0.89 nm). no selectivity is obtained using sdbs. due to its ineffectiveness in debundling. we assign the reduce selectivity of dihydroxy bile salts (s dc and tdc) in comparison with trihydroxy sc to the formation of secondary micelles. this is determined by the number and position of hydroxyl ( oh) groups on the a-side of the steroid backbone. we also enrich comocat swnt in the 0.84-0.92 nm range using the pluronic f98 triblock copolymer. mixtures of bile salts (sc) and linear chain surfactants (sos) are used to enrich metallic and semiconducting laser-ablation grown swnts. we demonstrate enrichment of a single chirality, (6,5), combining diameter and metallic versus semiconductillg separation on comocat samples.; Density gradient ultracentrifugation (DGU) has emerged as a promising tool to prepare chirality enriched nanotube samples. Here, we assess the performance of different surfactants for DGU. Bile salts (e.g., sodium cholate (SC), sodium deoxycholate (SDC), and sodium taurodeoxycholate (TDC)) are more effective in individualizing Single Wall Carbon Nanotubes (SWNTs) compared to linear chain surfactants (e.g., sodium dodecylbenzene sulfonate (SDBS) and sodium dodecylsulfate (SDS)) and better suited for DGU. Using SC, a narrower diameter distribution (0.69-0.81 nm) is achieved through a single DGU step on CoMoCAT tubes, when compared to SDC and TDC (0.69-0.89 nm). No selectivity is obtained using SDBS. due to its ineffectiveness in debundling. We assign the reduce selectivity of dihydroxy bile salts (S DC and TDC) in comparison with trihydroxy SC to the formation of secondary micelles. This is determined by the number and position of hydroxyl ( OH) groups on the a-side of the steroid backbone. We also enrich CoMoCAT SWNT in the 0.84-0.92 nm range using the Pluronic F98 triblock copolymer. Mixtures of bile salts (SC) and linear chain surfactants (SOS) are used to enrich metallic and semiconducting laser-ablation grown SWNTs. We demonstrate enrichment of a single chirality, (6,5), combining diameter and metallic versus semiconductillg separation on CoMoCAT samples.; submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-11-02t01:41:26z no. of bitstreams: 1 density gradient ultracentrifugation of nanotubes： interplay of bundling and surfactants encapsulation.pdf: 7741613 bytes, checksum: 5a6a0d37d10523f8443542659451be64 (md5); approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-11-02t02:03:19z (gmt) no. of bitstreams: 1 density gradient ultracentrifugation of nanotubes： interplay of bundling and surfactants encapsulation.pdf: 7741613 bytes, checksum: 5a6a0d37d10523f8443542659451be64 (md5); made available in dspace on 2010-11-02t02:03:19z (gmt). no. of bitstreams: 1 density gradient ultracentrifugation of nanotubes： interplay of bundling and surfactants encapsulation.pdf: 7741613 bytes, checksum: 5a6a0d37d10523f8443542659451be64 (md5) previous issue date: 2010; we are grateful to f. hennrich for providing the la tubes and to g. calogero and s. a. awan for useful discussions. we acknowledge funding from epsrc grants g030480/1. h00274x/1, the erc grant nanopots, a royal society brian mercer award for in and international joint project. f.b. acknowledges funding from a newton international fellowship, t.h. from king's college, cambridge, and p.h.t from project no.g2009cb929300. a.c.f. is a royal society wolfson research merit award holder.; 国际 |
| 学科主题 | 半导体物理 ; 半导体物理 |
| 收录类别 | SCI |
| 资助信息 | we are grateful to f. hennrich for providing the la tubes and to g. calogero and s. a. awan for useful discussions. we acknowledge funding from epsrc grants g030480/1. h00274x/1, the erc grant nanopots, a royal society brian mercer award for in and international joint project. f.b. acknowledges funding from a newton international fellowship, t.h. from king's college, cambridge, and p.h.t from project no.g2009cb929300. a.c.f. is a royal society wolfson research merit award holder. |
| 语种 | 英语 ; 英语 |
| 资助机构 | We are grateful to F. Hennrich for providing the LA tubes and to G. Calogero and S. A. Awan for useful discussions. We acknowledge funding from EPSRC grants G030480/1. H00274X/1, the ERC Grant NANOPOTS, a Royal Society Brian Mercer Award for In and international Joint Project. F.B. acknowledges funding from a Newton International Fellowship, T.H. from King's college, Cambridge, and P.H.T from Project No.G2009CB929300. A.C.F. is a Royal Society Wolfson Research Merit Award holder. |
| 公开日期 | 2010-11-02 ; 2010-11-02 ; 2011-04-28 |
| 源URL | [http://ir.semi.ac.cn/handle/172111/13915]  |
| 专题 | 半导体研究所_半导体超晶格国家重点实验室 |
| 通讯作者 | Ferrari, AC, Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England. 电子邮箱地址: acf26@eng.cam.ac.uk |
| 推荐引用方式 GB/T 7714 | Bonaccorso,F (Bonaccorso,F.),et al. Density Gradient Ultracentrifugation of Nanotubes: Interplay of Bundling and Surfactants Encapsulation, Density Gradient Ultracentrifugation of Nanotubes: Interplay of Bundling and Surfactants Encapsulation[J]. journal of physical chemistry c, JOURNAL OF PHYSICAL CHEMISTRY C,2010, 2010,114, 114(41):17267-17285, 17267-17285. |
| APA | Bonaccorso.,F .,F.).,Hasan.,T .,...&Ferrari, AC, Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England. 电子邮箱地址: acf26@eng.cam.ac.uk.(2010).Density Gradient Ultracentrifugation of Nanotubes: Interplay of Bundling and Surfactants Encapsulation.journal of physical chemistry c,114(41),17267-17285. |
| MLA | Bonaccorso,et al."Density Gradient Ultracentrifugation of Nanotubes: Interplay of Bundling and Surfactants Encapsulation".journal of physical chemistry c 114.41(2010):17267-17285. |
入库方式： OAI收割
来源：半导体研究所
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