don't know. beats me.
judging by the general references to computer simulation though and the complexity of the project -- its not likely they came up with this on the chalkboard.
all they have done as far as I can tell is stumble on a molecular design that's possible--ie it doesn't violate any rules of physics-- using a mathematical formula that's alluded to but not explained in detail.
there's no reference to how the molecule would be built either singly or in quantity.
Well the nanotubes themselves are already in commercial products. Golf club heads , among others. I doubt getting the titanium atoms to attach at the right places wouldn't seem all that difficult, because where else would they go. those probably being the natural attachment points in the carbon nanotube structure.