Volume 90, Number 5, June 2010
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||05 July 2010|
A dislocation model for the pentagon-heptagon pair in zigzag single-walled carbon nanotubes
Department of Physics and Institute for Structure and Function, Chongqing University Chongqing, 400030, PRC
Corresponding author: email@example.com
Accepted: 4 June 2010
The pentagon-heptagon (5/7) pair in a zigzag single-walled carbon nanotube (SWCNT) is described as a dislocation by the modified Peierls-Nabarro (P-N) theory. The theory takes discrete effects, size effects and curvature effects into account. The bonds variation and shape distortion caused by 5/7 pair have been evaluated. It is found that the neck bond (shared bond) becomes longer while the shoulder bonds become shorter comparing with the one of the hexagons. The results show that the zigzag chain across the center of the 5/7 pair will bend slightly in the axis direction towards the heptagon, and the tube will be flattened where the 5/7 pair is located because of the appearance of the internal stress and nonzero curvature.
PACS: 61.46.Fg – Nanotubes / 61.72.Lk – Linear defects: dislocations, disclinations / 61.72.Bb – Theories and models of crystal defects
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.