| Texto completo | |
| Autor(es): Mostrar menos - |
Nakar, Dekel
[1]
;
Gordeev, Georgy
[2]
;
Machado, Leonardo D.
[3]
;
Popovitz-Biro, Ronit
[4]
;
Rechav, Katya
[4]
;
Oliveira, Eliezer F.
[5, 6]
;
Kusch, Patryk
[2]
;
Jorio, Ado
[7]
;
Galvao, Douglas S.
[5, 6]
;
Reich, Stephanie
[2]
;
Joselevich, Ernesto
[1]
Número total de Autores: 11
|
| Afiliação do(s) autor(es): | [1] Weizmann Inst Sci, Dept Mat & Interfaces, IL-7610001 Rehovot - Israel
[2] Free Univ Berlin, Dept Phys, D-14195 Berlin - Germany
[3] Univ Fed Rio Grande do Norte, Dept Theoret & Expt Phys, BR-59078970 Natal, RN - Brazil
[4] Weizmann Inst Sci, Dept Chem Res Support, IL-7610001 Rehovot - Israel
[5] State Univ Campinas UNICAMP, Appl Phys Dept, BR-13083859 Campinas, SP - Brazil
[6] State Univ Campinas UNICAMP, CCES, BR-13083859 Campinas, SP - Brazil
[7] Univ Fed Minas Gerais, Dept Fis, BR-31270901 Belo Horizonte, MG - Brazil
Número total de Afiliações: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Nano Letters; v. 20, n. 2, p. 953-962, FEB 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
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 as 163 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. (AU) | |
| Processo FAPESP: | 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono |
| Beneficiário: | Eliezer Fernando de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |