Like every atom is at a nano scale, why isnt it already called nanotechnology? What do they do to make something referred as ‘Nano’.
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Chemists and engineers have a lot of sneaky tricks to build complex things on very tiny scales. Take your computer, for instance. The transistors inside there are so small that they are only several atoms across. Pretty much reaching the limit of what physics allows. How are they built? Photolithography. The process of using light to essentially carve out these structures. You can also use a sort of 3D printing. In the medical world, we can edit DNA and build pharmaceutical molecules using a bunch of tricks, exploiting chemical reactions or other things your body already does.
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