Effect of Single Vacancy Defect on Fundamental Frequency of Single Walled Carbon Nanotube

This paper studies the effect of single vacancy defect on the fundamental frequency of carbon nanotube using finite element method. Cantilevered and bridged boundary conditions have been used for carbon nanotube with and without attached mass. There is less effect on the frequency of cantilevered structure due to presence of defect at center rather than its presence at other positions. Presence of defect near to fixed end shows more effect on fundamental frequency of bridged structure as opposed to other positions. Cantilevered structure with mass attached shows increase in effect due to presence of defect when mass ranges from 10-3 to 10-6 femtogram, while it seems to remain constant with further decrease in mass. This paper is mainly concerned about the overall effect of single vacancy defect at the different positions and with different parameters of carbon nanotube with and without attached mass on the frequency and frequency shift. Nano materials are playing a vital role in all the sectors. Particularly nano materials are used in automotive industries in a wide range such as as reinforcement materials in vehicle Production, fuel component system to increase the fuel efficiency etc. Use of SWCNTs and DWCNTs in tires allows significant improvement in their stiffness, tear resistance, fuel efficiency and grip, printable, thermoformable, capacitive touch sensors for replacing membrane switches in automotive interiors (as well as in white goods and medical equipment and devices). Keyword: Frequency, mass, defect, cantilever, SWCNT