  We investigated the internal dynamics of several electro-fluid shuttle memory
elements, consisting of several media encapsulated in C640 nanocapsule. The
systems proposed were (i) bucky shuttle memory devices (C36+ @C420 and C60+
@C420), (ii) encapsulated-ions shuttle memory devices ((13+)@C420, (3+ -C60-2+
)@C640 and (5+ -C60)@C640) and (iii) endo-fullerenes shuttle memory devices
((K+ @C60- F-@C60)@C640). Energetics and operating responses of several
electro-fluidic shuttle memory devices, such as transitions between the two
states of the C640 capsule, were examined by classical molecular dynamics
simulations of the shuttle media in the C640 capsule under the external force
fields. The operating force fields for the stable operations of the shuttle
memory device were investigated.
