Few-Wall Carbon Nanotube Coils

Author(s):Show less -

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]

Affiliation

^[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

• Document type: Journal article
• Source: Nano Letters; v. 20, n. 2, p. 953-962, FEB 2020.
• Web of Science Citations: 0

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 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)

• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral