STM imaging of carbon nanotube point defects

✍ Scribed by Osváth, Z. ;Tapasztó, L. ;Vértesy, G. ;Koós, A. A. ;Horváth, Z. E. ;Gyulai, J. ;Biró, L. P.

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 298 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200675330

✦ Synopsis

Abstract

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)