I used to wonder, what can we even use graphene for? A sheet of carbon only an atom thick, what use is it if it’s so small? But actually I’m starting to realise it’s possible applications. I watched a video on carbon nanotubes and just when I thought there were no more surprises, I find that rolling carbon nanotubes up in different ways gives you different electrical conductivities! Just by changing the rolling a little bit, you can create a semiconductor, a metal or a half metal!