That would be regular thermite, Altai, which can, in and of itself, readily melt and cut thru steel beams and columns One can't do any research on nanothermite because it isn't available because it is SOLELY a US government military grade high explosive.
Again,
See, 9/11 Experiments: The Great Thermate Debate
Nano sized particles increase the explosive power by a factor that is unknown to the general public, unknown to demolition experts because it and its properties, other than in a general sense like that described above, is unknown to everyone except secretive US government folks.
Why hasn't the honest, upfront US government told everyone like the 911 Commission, NIST, the people who govern them, that the nanothermite and the nanothermite residues found in WTC dust, not just a wee bit of residue, about 6% of the dust is nanothermite residue and UNREACTED nanothermite particles is a material that the ALLEGED HIJACKERS COULD NOT HAVE HAD, nor could they have obtained it, and even if they could have obtained it they couldn't have ferried it over to WTC7?
There is NO legal or legitimate reason for nanothermite or even regular thermite to have been at WTC. Its presence tells the whole story. As does the molten and vaporized steel, as does the free fall, the acceleration of the twin towers, the ... .