Module 1 : Introduction to materials

Lecture 7 : Introduction to nanoscience and nanotechnology - Carbon nanotubes, fullerenes

 

* Arc discharge was the first method for producing both SWNTs and MWNTs

* Arc discharge synthesis uses a low-voltage (~12 to 25 V), high-current (50 to 120 amps)and power supply (an arc welder can be used).

* An arc is produced across a 1-mm gap between two graphite electrodes 5 to 20 mm in diameter. An inert gas such as He or Ar is used as the atmosphere for the reaction, at a pressure of 100 to 1000 torr.