Doping of Carbon Nanotubes by Heavy Alkali Metals

Abstract
Multiwall (MWNT) and single wall (SWNT) carbon nanotubes were intercalated with heavy alkali metals. From the point of view of their composition, alkali 2D superlattice, EPR and 13C NMR characteristics, the intercalation compounds of MWNT (1st and 2nd stage) are close to their parent GIC. An expansion of the 2D triangular lattice of SWNT bundles was clearly detected, showing that the alkali atoms are intercalated in the free space between the tubes.