That’s just what Lee Cronin aims to find out. The idea of 3d printing has been in the mythology of science fiction for years. The most iconic probably is the Star Trek replicator. This twist on the idea consists of taking the atomic building blocks of a molecule and putting them together not through chemical transformations alone but through a combination of physical and chemical manipulation. The developers of this technology are calling it making an app out of chemistry. Ultimately the end goal is to allow anyone with the printer to make their own custom medicine, how great would that be? It’s one more innovative use of 3d printing technology. There is a short Ted Talk that describes this work by Lee Cronin, it’s a good watch and linked here.