Lecture 7 : Introduction to nanoscience and nanotechnology - Carbon nanotubes, fullerenes
Chemical Vapour Deposition
Chemical vapour deposition (CVD) synthesis is achieved by putting a carbon source in the gas phase and using an energy source, such as a plasma or a resistively heated coil, to transfer energy to a gaseous carbon molecule.
The energy source is used to "crack" the gaseous molecule CH4 molecule into reactive atomic carbon.
Then, the carbon diffuses towards the substrate, which is heated and coated with a catalyst such as Ni, Fe or Co where it will bind to form nanotubes.