Showing posts from July, 2011

New graphene discovery brings practical devices closer | KurzweilAI

Graphene's band dispersion and low energy Dirac cone in a monolayer of carbon atoms arranged in a hexagonal lattice (credit: University of Manchester) Interactions between electrons significantly enhance the already high velocity of electrons in graphene, researchers at The University of Manchester have found.They anticipate their findings will accelerate building graphene-based devices such as touchscreens, ultrafast transistors, and photodetectors.The researchers used extremely high-quality graphene devices, prepared by suspending sheets of graphene in a vacuum. This eliminated most of the unwanted scattering mechanisms for electrons in graphene, enhancing the effect of electron-on-electron interaction.This is the first effect of its kind where the interactions between electrons in graphene could be clearly seen.The electrons in graphene behave like massless Dirac particles that appear in the electronic band structure as gapless excitations with a linear dispersion.“The exciting…

IBM develops 'instantaneous' memory, 100x faster than flash