How does one roughly predict the mean free path for electrical conduction in a nanostructure under at different temperatures and under different electrical conditions such as different voltages and amperages based on the composition and dimensions of the structure and the electrical conditions the material is exposed to?
For instance in carbon single and multilayer nanotubes vs graphene ribbons vs silicon nanowires, and all of different sizes.
In other words how do I predict the average range of electrical ballistic conduction in a described structure under different power and temperature conditions?