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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Few-Wall Carbon Nanotube Coils

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Autor(es):
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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
Linha de fomento: 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
Linha de fomento: Bolsas no Brasil - Pós-Doutorado