Multi-Walled and Singlewall Carbon Nanotubes Produced by Arc Discharge Method.

Manufacture of Carbon Multi-Walled Nanotubes by the Arc Discharge Technique

This study focuses on the manufacture of carbon nanotubes using the arc discharge method. Several independent variables were changed, such as the current (80 and 100 A), an atmosphere of open air or argon and the catalyst (no catalyst, Fe or a mixture of Fe/Co,Ni). Only one set of parameters yielded MWNTs, involving Fe as the catalyst and an open air atmosphere. I. INTRODUCTION There has been i...

Exposure and emission measurements during production, purification, and functionalization of arc-discharge-produced multi-walled carbon nanotubes.

BACKGROUND The production and use of carbon nanotubes (CNTs) is rapidly growing. With increased production, there is potential that the number of occupational exposed workers will rapidly increase. Toxicological studies on rats have shown effects in the lungs, e.g., inflammation, granuloma formation, and fibrosis after repeated inhalation exposure to some forms of multi-walled CNTs (MWCNTs). St...

High-yield synthesis of single-walled carbon nanotubes by gravity-free arc discharge

Single-walled carbon nanotubes ~SWNTs! have been produced in high yield by the dc arc discharge technique under gravity-free conditions. Gravity-free conditions can reduce the convection flow of the buffer gas during the arc discharge, which results in the increase of high thermostatic volume around the arc flame. The yields of both the total soot and SWNTs in soot are significantly increased. ...

Effects of Gravity and Magnetic Field on Production of Single-Walled Carbon Nanotubes by Arc-Discharge Method

Production of Carbon Nanotubes and Carbon Nanoclusters by the JxB Arc-Jet Discharge Method