[alted]

And it turns out DIY atomic force microscopes are possible too! (e.g., [1]) It's probably less likely to get all the way to atomic resolution (0.01nm) like a scanning tunneling microscope, but atomic force microscopes can take many types of 1-to-1000nm-scale measurements and are often more practically useful.

[1] https://hackaday.com/2014/04/29/a-diy-atomic-force-microscop...