Researchers flatten nanometre-high wrinkles in graphene
MIT researchers have devised a way to flatten nanometre-high wrinkles in graphene, a carbon form. Graphene is usually obtained by chemical vapour depostion of carbon atoms on copper. But the researchers used an oxidised silicon wafer bearing electrostatic charges instead of copper. On depositing graphene, the silicon dioxide pulled graphene's carbon atoms onto the wafer, ironing out the wrinkles.