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Channelling and induced defects at ion-bombarded aligned multiwall carbon nanotubes

D Acunto, Giulio LU ; Ripanti, Francesca ; Postorino, Paolo ; Betti, Maria Grazia ; Scardamaglia, Mattia LU ; Bittencourt, Carla and Mariani, Carlo (2018) In Carbon 139. p.768-768
Abstract
A detailed investigation of ion channelling and defect production for a highly- ordered array of multi-wall carbon nanotubes is presented. The effects of argon ion bombardment (0.25–5 keV) carried out either parallel (top) or perpendicular (side) to their axis, have been studied by Raman, X-Ray Photoelectron Spectroscopy and Scanning Electron Microscopy. Raman spectra provided evidence of channelling of the Ar+ ions observed for top bombardment along the whole 180 μm carbon nanotube length, while the penetration length is limited to the first 10 μm when the ions impinge from the side. The nature of defects, determined through the spectral fingerprints of the C 1s core level as a function of energy and flux, unveils a distorted sp3-like... (More)
A detailed investigation of ion channelling and defect production for a highly- ordered array of multi-wall carbon nanotubes is presented. The effects of argon ion bombardment (0.25–5 keV) carried out either parallel (top) or perpendicular (side) to their axis, have been studied by Raman, X-Ray Photoelectron Spectroscopy and Scanning Electron Microscopy. Raman spectra provided evidence of channelling of the Ar+ ions observed for top bombardment along the whole 180 μm carbon nanotube length, while the penetration length is limited to the first 10 μm when the ions impinge from the side. The nature of defects, determined through the spectral fingerprints of the C 1s core level as a function of energy and flux, unveils a distorted sp3-like bonding increase and the π-excitation decrease till quenching. Dangling bond states due to displaced carbon atoms become significant only at beam energies higher than 0.25 keV and high flux. These results on anisotropic channelling and selective defects creation open new perspectives in the application of highly-ordered arrays of multi-wall carbon nanotubes as anisotropic detectors. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
Carbon
volume
139
pages
768 - 768
publisher
Elsevier
external identifiers
  • scopus:85050259965
ISSN
0008-6223
DOI
10.1016/j.carbon.2018.07.032
language
English
LU publication?
no
id
a4c2a611-6a1e-4a27-92ca-98c0e3b83eb5
date added to LUP
2022-05-05 14:44:55
date last changed
2022-05-12 11:17:45
@article{a4c2a611-6a1e-4a27-92ca-98c0e3b83eb5,
  abstract     = {{A detailed investigation of ion channelling and defect production for a highly- ordered array of multi-wall carbon nanotubes is presented. The effects of argon ion bombardment (0.25–5 keV) carried out either parallel (top) or perpendicular (side) to their axis, have been studied by Raman, X-Ray Photoelectron Spectroscopy and Scanning Electron Microscopy. Raman spectra provided evidence of channelling of the Ar+ ions observed for top bombardment along the whole 180 μm carbon nanotube length, while the penetration length is limited to the first 10 μm when the ions impinge from the side. The nature of defects, determined through the spectral fingerprints of the C 1s core level as a function of energy and flux, unveils a distorted sp3-like bonding increase and the π-excitation decrease till quenching. Dangling bond states due to displaced carbon atoms become significant only at beam energies higher than 0.25 keV and high flux. These results on anisotropic channelling and selective defects creation open new perspectives in the application of highly-ordered arrays of multi-wall carbon nanotubes as anisotropic detectors.}},
  author       = {{D Acunto, Giulio and Ripanti, Francesca and Postorino, Paolo and Betti, Maria Grazia and Scardamaglia, Mattia and Bittencourt, Carla and Mariani, Carlo}},
  issn         = {{0008-6223}},
  language     = {{eng}},
  month        = {{11}},
  pages        = {{768--768}},
  publisher    = {{Elsevier}},
  series       = {{Carbon}},
  title        = {{Channelling and induced defects at ion-bombarded aligned multiwall carbon nanotubes}},
  url          = {{http://dx.doi.org/10.1016/j.carbon.2018.07.032}},
  doi          = {{10.1016/j.carbon.2018.07.032}},
  volume       = {{139}},
  year         = {{2018}},
}