We’re nowhere near being able to combine atoms in the way we ultimately want to! This video shows just what type of basic, faltering, baby steps we’re taking at the moment: https://www.youtube.com/watch?v=UBmBMmuUBMk
I really hope that in twenty years’ time (or so) that we’ll be at the point where we can build a nanoparticle (a tiny speck of matter) at atom at a time. But that’s a looooong way off. At the moment we – and a number of research groups elsewhere in the world — can move atoms and molecules around on a surface with very high precision, but moving into the third dimension is *really* tricky.
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