No, doesn't make sense. The problem is that gravity is incredibly weak at those scales, and the event horizon is incredibly tiny. A black hole that size, even if it doesn't immediately evaporate, will not aborb the atoms it passes by, it won't even be attracted to them measureably. It will only absorb subatomic particles that it directly impacts, and if you know about the scales of subatomic particles and how much of an atom is empty space, you'll know that the black hole would very, very, very rarely ever impact another particle.


Here's a thought though... What if one of these black-hole forming collissions occured in a place with much higher density, like a neutron star. With the number of high energy cosmic rays whizzing around out there, every neutron star should be hit by high energy cosmic rays fairly frequently.

Those collisions would not only be much more energetic than anything a LHC could produce in the lab, they would be in an environment where a non-evaporating micro black hole could actually gain significant mass relatively quickly. If non-evaporating black holes could be formed by a particle collision, shouldn't neutron stars collapse quickly into black holes?