I wonder if you could do this at a fairly macro scale with lots of reactant. I'm thinking along the lines of an electromagnetic enzyme. The goal wouldn't be to

I wonder if you could do this at a fairly macro scale with lots of reactant. I'm thinking along the lines of an electromagnetic enzyme. The goal wouldn't be to build things up from the atomic level or pick and place atoms but to speed up naturally occurring reactions the way enzymes do. As long as you could line the fields up properly or switch them fast enough you would be able to nudge the reactions along. You'd need some way to pump the product out to the next step but you might be able to select for it with a field as well. Edit: after reading further into the paper I see that this is close to what they have in mind