Fig. 4: Theoretical pictures of hybrid nanocarbon peapods.
From: A hybrid molecular peapod of sp2- and sp3-nanocarbons enabling ultrafast terahertz rotations

a Hydrogen bonds at the interface of [3]CdbC⊃adm. Bond paths (orange) and (3,–1) bond critical points (blue) from AIM analyses are shown. b Energy profile for the hypothetical rotations of adm within [3]CdbC. The most stable global minimum is located at (A,B) = (0,0). See also Supplementary Movies 1 and 2.