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http://hdl.handle.net/1843/46566| Type: | Artigo de Periódico |
| Title: | Few-wall carbon nanotube coils |
| Authors: | Dekel Nakar Stephanie Reich Ernesto Joselevich Leonardo Dantas Machado Ronit Popovitz-Biro Katya Rechav Eliezer Fernando de Oliveira Patryk Kusch Ado Jorio de Vasconcelos Douglas Soares Galvão |
| Abstract: | While various electronic components based on carbon nanotubes (CNTs) have already been demonstrated, the realization of miniature electromagnetic coils based on CNTs remains a challenge. Coils made of single-wall CNTs with accessible ends for contacting have been recently demonstrated but were found unsuitable to act as electromagnetic coils because of electrical shorting between their turns. Coils made of a few-wall CNT could in principle allow an insulated flow of current and thus be potential candidates for realizing CNT-based electromagnetic coils. However, no such CNT structure has been produced so far. Here, we demonstrate the formation of few-wall CNT coils and characterize their structural, optical, vibrational, and electrical properties using experimental and computational tools. The coils are made of CNTs with 2, 3, or 4 walls. They have accessible ends for electrical contacts and low defect densities. The coil diameters are on the order of one micron, like those of single-wall CNT coils, despite the higher rigidity of few-wall CNTs. Coils with as many as163 turns were found, with their turns organized in a rippled raft configuration. These coils are promising candidates for a variety of miniature devices based on electromagnetic coils, such as electromagnets, inductors, transformers, and motors. Being chirally and enantiomerically pure few-wall CNT bundles, they are also ideal for fundamental studies of interwall coupling and superconductivity in CNTs. |
| Subject: | Nanotubos de carbono Nanotubos de carbono de paredes múltiplas Transmission electron microscopes 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/10.1021/acs.nanolett.9b03977 |
| URI: | http://hdl.handle.net/1843/46566 |
| Issue Date: | 23-Dec-2019 |
| metadata.dc.url.externa: | https://pubs.acs.org/doi/10.1021/acs.nanolett.9b03977 |
| metadata.dc.relation.ispartof: | Nano Letters |
| Appears in Collections: | Artigo de Periódico |
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