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STM imaging of carbon nanotube point defects
Author(s) -
Osváth Z.,
Tapasztó L.,
Vértesy G.,
Koós A. A.,
Horváth Z. E.,
Gyulai J.,
Biró L. P.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200675330
Subject(s) - hillock , carbon nanotube , materials science , graphite , irradiation , ion , nanotube , bent molecular geometry , nanotechnology , carbon fibers , crystallographic defect , electric arc , crystallography , chemistry , composite material , composite number , organic chemistry , physics , electrode , nuclear physics
In this work the STM investigation of nanotube point defects created by ion irradiation (e.g. vacancies) is presented. The defects appeared as hillock‐like features on the STM images. These defects were compared with similar features observed on the STM images of as‐grown coiled carbon nanotubes. In this case the observed hillock‐like features were attributed to the non‐hexagonal carbon rings, which are responsible for the growth of bent and coiled nanotube structures. For irradiation, multi‐walled carbon nanotubes produced by the arc‐discharge method were dispersed on highly oriented pyrolitic graphite (HOPG) surface and irradiated with Ar + ions of 30 keV, using a low dose of D = 5 × 10 11 ions/cm 2 . (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)