Defect-Free Carbon Nanotube Coils.
- Shadmi N Department of Physics, Nano-magnetism Research Center, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat-Gan, 52900, Israel.
- Kremen A Department of Physics, Nano-magnetism Research Center, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat-Gan, 52900, Israel.
- Frenkel Y ETH Zürich , Photonics Laboratory, Zürich, 8093, Switzerland.
- Lapin ZJ Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas , C. P. 6165, 13083-970 Campinas, Sao Paulo, Brazil.
- Machado LD Departamento de Fisica, CCT, Universidade Federal de Roraima , 69304-000 Boa Vista, Roraima, Brazil.
- Legoas SB Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas , C. P. 6165, 13083-970 Campinas, Sao Paulo, Brazil.
- Bitton O Departamento de Física, Universidade Federal de Minas Gerais , Belo Horizonte, MG 31270-901, Brazil.
- Rechav K ETH Zürich , Photonics Laboratory, Zürich, 8093, Switzerland.
- Popovitz-Biro R Department of Physics, Nano-magnetism Research Center, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University , Ramat-Gan, 52900, Israel.
- Galvão DS
- Jorio A
- Novotny L
- Kalisky B
- Joselevich E
- 2015-12-29
Published in:
- Nano letters. - 2016
English
Carbon nanotubes are promising building blocks for various nanoelectronic components. A highly desirable geometry for such applications is a coil. However, coiled nanotube structures reported so far were inherently defective or had no free ends accessible for contacting. Here we demonstrate the spontaneous self-coiling of single-wall carbon nanotubes into defect-free coils of up to more than 70 turns with identical diameter and chirality, and free ends. We characterize the structure, formation mechanism, and electrical properties of these coils by different microscopies, molecular dynamics simulations, Raman spectroscopy, and electrical and magnetic measurements. The coils are highly conductive, as expected for defect-free carbon nanotubes, but adjacent nanotube segments in the coil are more highly coupled than in regular bundles of single-wall carbon nanotubes, owing to their perfect crystal momentum matching, which enables tunneling between the turns. Although this behavior does not yet enable the performance of these nanotube coils as inductive devices, it does point a clear path for their realization. Hence, this study represents a major step toward the production of many different nanotube coil devices, including inductors, electromagnets, transformers, and dynamos.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1021/acs.nanolett.5b03417
- PMID 26708150
- Persistent URL
- https://sonar.ch/global/documents/140224
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