Contact: Mark Esser
National Institute of Standards and Technology (NIST)
Caption: NIST measurements show that interactions of the graphene layers with the insulating substrate material causes electrons (red, down arrow) and electron holes (blue, up arrow) to collect in "puddles." The differing charge densities creates the random pattern of alternating dipoles and electon band gaps that vary across the layers.
Usage Restrictions: None
Related news release: 2 graphene layers may be better than 1