One question I have is how on earth can the CNT system work in the gas phase when all the carefully structured CNT frameworks would be vaporised?
Think Hydrotons. It seems possible, though the ID is bigger than Ed's cracks.
Would the electric fields on the inside of a CNT be enough to constrain deuterons to the center axis? Production of low energy photons would be a possible path of quantized energy release and diffuse thermalization.