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http://hdl.handle.net/1843/42361| Type: | Artigo de Periódico |
| Title: | Inner-and outer-wall sorting of double-walled carbon nanotubes |
| Authors: | Han Li Benjamin Scott Flavel Georgy Gordeev Sören Wasserroth Venkata Sai Kiran Chakravadhanula Chethala Neelakandhan Shyam Kumar Frank Hennrich Ado Jorio de Vasconcelos Stephanie Reich Ralph Krupke |
| Abstract: | Double-walled carbon nanotubes (DWCNTs) consist of two coaxially aligned single-walled carbon nanotubes (SWCNTs), and previous sorting methods only achieved outer-wall electronic-type selectivity. Here, a separation technique capable of sorting DWCNTs by semiconducting (S) or metallic (M) inner- and outer-wall electronic type is presented. Electronic coupling between the inner and outer wall is used to alter the surfactant coating around each of the DWCNT types, and aqueous gel permeation is used to separate them. Aqueous methods are used to remove SWCNT species from the raw material and prepare enriched DWCNT fractions. The enriched DWCNT fractions are then transferred into either chlorobenzene or toluene using the copolymer PFO–BPy to yield the four inner@outer combinations of M@M, M@S, S@M and S@S. The high purity of the resulting fractions is verified by absorption measurements, transmission electron microscopy, atomic force microscopy, resonance Raman mapping and high-density field-effect transistor devices. |
| Subject: | Nanotubos de carbono de paredes múltiplas Espectroscopia de Raman |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1038/nnano.2017.207 |
| URI: | http://hdl.handle.net/1843/42361 |
| Issue Date: | 2-Oct-2017 |
| metadata.dc.url.externa: | https://www.nature.com/articles/nnano.2017.207 |
| metadata.dc.relation.ispartof: | Nature Nanotechnology |
| Appears in Collections: | Artigo de Periódico |
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