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(Disclaimer, I know very little about chemistry)
I came across the field of work known as reticular chemistry recently. Reticular chemistry is essentially the study of the systematic construction of three dimensional lattices of ... "stuff". To indicate why this is potentially so important, for instance in the early 1990s polymer chemistry (the construction of a chain of "things"), was already quite well advanced, but there was very little known about systematic and controlled creation of 2d or 3d structures.
The discovery that this sort of thing might be possible seems to be due to one or two others, but the bulk of the work in terms of fleshing out the promise of same seems to have been done by this fellow and his collaborators, whose group has made a systematic series of strides in it since the mid 90s: http://yaghi.berkeley.edu/
I originally came across this work in an announcement of 'extraction of water from desert air' that was mentioned breathlessly in a recent edition of New Scientist (I think?), and was interested in the science behind it: https://news.berkeley.edu/2019/08/27/water-harvester-makes-it-easy-to-quench-your-thirst-in-the-desert/ .
Following up, I came across this video, wherein it was indicated by Omar Yaghi that this sort of thing could be used not only for water extraction, but for carbon dioxide sequestration as well as generation of things like methanol: https://www.youtube.com/watch?v=KOOVBKWRLxk . He also briefly indicated that more complex things could be done by building on more recent ideas from his group.
Omar Yaghi has also written a book on this sort of form of modern precursor to practical nanotechnology: https://www.amazon.com.au/Introduction-Reticular-Chemistry-Metal-organic-Frameworks/dp/3527345027/ref=sr_1_1?keywords=reticular+chemistry&qid=1565850793&s=books&sr=1-1 , but it is a bit expensive!