Investigating the Effects of Stone-Wales and Vacancy Defects on Mechanical Properties of Single-Walled Carbon Nanotubes

Coskun Kagan Ozel, Volkan Esat

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Carbon nanotubes (CNTs) are very unique tubular nanostructures with extraordinary material properties. A pristine CNT is a seamless roll of perfect hexagonal carbon atom network [1]. The geometric structure of CNTs depends on the chirality. Chirality can be found by chiral vector (n,m) or chiral angle. According to chirality, CNTs can be categorised as armchair (n,n), zigzag (n,0), or chiral (n,m). Moreover, CNTs can be grouped in line with the number of concentric tubes which they possess in the structure; namely as, multi-walled carbon nanotubes (MWNTs) or single-walled carbon nanotubes (SWNTs) [2].

Defects are common in carbon nanotubes, whose roles can be critical since they potentially disturb the perfect hexagonal lattice structure of CNTs [3]. Defects can either occur during synthesis of CNTs or be formed after synthesis due to environmental conditions. Several different type of defects can be seen in the CNT structures. However, the most common structural defects in CNTs are vacancies and Stone-Wales (SW) defects [4].

The aim of this work is to develop a finite element (FE) model to simulate vacancy and Stone-Wales defects on SWNTs, and conduct a comparative study to understand the effects of these type of defects on mechanical properties of SWNTs.
Original languageEnglish
Title of host publicationICCE 27 - The 27th Annual International Conference on Composites/Nano Engineering, Granada, Spain
Number of pages2
Publication statusPublished - 20 Jul 2019

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