[Red Badger]

There’s no such thing as silicon nanotubes, as fas as I know.

https://en.wikipedia.org/wiki/Silicon_nanotube

[Kevmo]

Note that they use carbon nanotubes as the basis for those silicon 0.2 micron [not really nano-] tubes. Carbon is about 20x smaller than silicon — Far more likely to have individualized linear sets of atoms traveling in the smaller tube.

And once a fusion reaction happens, nothing is strong enough to hold it in place.