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Single-atom scale structural selectivity in Te nanowires encapsulated inside ultranarrow, single-walled carbon nanotubes.
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Medeiros, Paulo V. C., Marks, Samuel R., Wynn, Jamie M., Vasylenko, Andrij, Ramasse, Quentin M., Quigley, David, Sloan, Jeremy and Morris, Andrew J. (2017) Single-atom scale structural selectivity in Te nanowires encapsulated inside ultranarrow, single-walled carbon nanotubes. ACS Nano, 11 (6). pp. 6178-6185. doi:10.1021/acsnano.7b02225 ISSN 1936-0851.
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Official URL: http://dx.doi.org/10.1021/acsnano.7b02225
Abstract
Extreme nanowires (ENs) represent the ultimate class of crystals: They are the smallest possible periodic materials. With atom-wide motifs repeated in one dimension (1D), they offer a privileged perspective into the physics and chemistry of low-dimensional systems. Single-walled carbon nanotubes (SWCNTs) provide ideal environments for the creation of such materials. Here we present a comprehensive study of Te ENs encapsulated inside ultranarrow SWCNTs with diameters between 0.7 nm and 1.1 nm. We combine state-of-the-art imaging techniques and 1D-adapted ab initio structure prediction to treat both confinement and periodicity effects. The studied Te ENs adopt a variety of structures, exhibiting a true 1D realization of a Peierls structural distortion and transition from metallic to insulating behavior as a function of encapsulating diameter. We analyze the mechanical stability of the encapsulated ENs and show that nanoconfinement is not only a useful means to produce ENs but also may actually be necessary, in some cases, to prevent them from disintegrating. The ability to control functional properties of these ENs with confinement has numerous applications in future device technologies, and we anticipate that our study will set the basic paradigm to be adopted in the characterization and understanding of such systems.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Science > Centre for Scientific Computing |
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| Library of Congress Subject Headings (LCSH): | Nanowires, Carbon nanotubes, Tellurium, Transmission electron microscopy, Scanning transmission electron microscopy, Electron energy loss spectroscopy | ||||||||
| Journal or Publication Title: | ACS Nano | ||||||||
| Publisher: | American Chemical Society | ||||||||
| ISSN: | 1936-0851 | ||||||||
| Official Date: | 27 June 2017 | ||||||||
| Dates: |
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| Volume: | 11 | ||||||||
| Number: | 6 | ||||||||
| Page Range: | pp. 6178-6185 | ||||||||
| DOI: | 10.1021/acsnano.7b02225 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 20 July 2017 | ||||||||
| Date of first compliant Open Access: | 21 July 2017 | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
| Grant number: | EP/M011925/1,EP/M010643/1,EP/L015552/1,EP/I033394/1 | ||||||||
| Open Access Version: |
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