SEM and TEM
1. Why is the resolution of a Scanning Electron Microscope (SEM) typically lower than that of a Transmission Electron Microscope (TEM)? Explain your reasoning
2. Explain briefly the theory of electron energy loss spectroscopy and why it might be useful for analysing nanomaterials
3. The chirality of a carbon nanotube helps to define its properties. Given that nanotubes are often fabricated with the use of a metal catalyst, give an example from the literature of how TEM has been used to investigate the effect of the metal catalyst on nanotube growth.