Potassium intercalated multiwalled carbon nanotubes

Full intralayer potassium intercalation in multiwalled carbon nanotubes MWCNTs was achieved by carefully engineering the nanotube morphology (length, width, and number of layers). The complete intercalation induced a high doping resulting in metallic nanotubes with a bright golden color. The successful intercalation of MWCNTs serves as a first step for obtaining controlled graphene nano-ribbons through exfoliation and potentially preparing superconducting nanotubes.