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Why is graphene better than silicon?


Apparently, (much) smaller transistors can be made out of it, for better power efficiency and speed.


The article mentions using "standard lithographic techniques". Wouldn't it run into the same issues with extreme ultraviolet patterning that silicon fabs now face?


I don't know about lithography. Apparently suggested technologies for graphene are rather different.

https://www.technologyreview.com/s/409449/graphene-transisto... — uses narrow (< 10nm) bands of graphene produced by ultrasound.

https://phys.org/news/2016-05-graphene-based-transistor-cloc... — uses some tech I did not understand to put two sheets of graphene very close by and control the tunneling.

Both mention 2-3 orders of magnitude speedup, compared to silicon.


Return to Moore's law?


This is very interesting, I didn't know!


Another reason is that it's abundant, and it goes without saying that it's a carbon sink. It's also an extremely flexible material, mechanically and otherwise.


Isn’t silicon extremely abundant? It makes up about a quarter of the Earth’s crust.


My impression is that you can do stuff with carbon that you can't do with silicon unless you dope with rare minerals. I could be wrong. Can someone elaborate who knows more about this than I do?


Good point, I forgot about the doping.


It is at least as abundant as carbon, but it's not found pure in nature and purifying it requires a lot more energy than carbon and is a lot dirtier.


among other things: ballistic conduction


Could you elaborate please?


"Ballistic conduction (ballistic transport) is the transport of electrons in a medium having negligible electrical resistivity caused by scattering. Without scattering, electrons simply obey Newton's second law of motion at non-relativistic speeds."

https://en.wikipedia.org/wiki/Ballistic_conduction


I read this, had the hope someone could explain this a bit simpler :/


It means electrons travel without bumping into other particles.


Does this imply less power is needed?


There’s no resistance, so it’s almost like a superconductor. No power loss to heat.


BALLISTIC CONDUCTION


D:




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