The engineering at those scales is pretty magical isn't it! Getting a whole bunch of individual atoms exactly where they want them.
I wonder what the success rate is - i.e. how many do they build to get one working.
Usually they randomly shoot atoms at the substrate and then just search for a spot (among thousands) where it randomly has the configuration they want. Still pretty amazing.
Can they do that here, they've got quite a few sets of 4/5 atoms which they've interconnected, so that's a lot to get by shotgunning it. I'd assumed they were using something like a STM to nudge the atoms around.
