Agglomeration defects on irradiated carbon nanotubes

Journal Article · Thu Mar 15 04:00:00 EDT 2012 · AIP Advances

DOI:https://doi.org/10.1063/1.3696884· OSTI ID:22063931

Steini Moura, Cassio ^[1]; Balzaretti, Naira Maria; Amaral, Livio ^[2]; Gribel Lacerda, Rodrigo; Pimenta, Marcos A ^[3]

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1. Faculty of Physics, Pontificia Universidade Catolica do Rio Grande do Sul, 90619-900, Porto Alegre, RS (Brazil)
2. Institute of Physics, Universidade Federal do Rio Grande do Sul, C.P.: 15051, 91501-070, Porto Alegre, RS (Brazil)
3. Universidade Federal de Minas Gerais, C.P.: 702, 31270-901, Belo Horizonte, MG (Brazil)

Aligned carbon nanotubes (CNT) were irradiated in the longitudinal and perpendicular directions, with low energy carbon and helium ions in order to observe the formation of defects in the atomic structure. Analysis through Raman spectroscopy and scanning electron microscopy indicated bundle rupture and ion track formation on nanotube bundles. Aligned CNT presented a kind of defect comprising ravine formation and tube agglomeration on top of the substrate. The latter structure is possibly caused by static charge accumulation induced by the incoming ions. Fluence plays a role on the short range order. Higher fluence irradiation transforms CNT into amorphous carbon nanowires.

• OSTI ID: 22063931
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 1 Vol. 2; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
AGGLOMERATION
CARBON
CARBON IONS
CRYSTAL DEFECTS
HELIUM IONS
ION BEAMS
IRRADIATION
NANOTUBES
PHYSICAL RADIATION EFFECTS
QUANTUM WIRES
RAMAN SPECTRA
RAMAN SPECTROSCOPY
RUPTURES
SCANNING ELECTRON MICROSCOPY
SUBSTRATES