Much in the same fashion as the nanoguitar, which was made in 1997 by the Cornell NanoFabrication Lab, scientist have continued the craze of real, tiny objects by making a nano Mona Lisa, where each pixel is 125nm in width and length..
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| Mona Lisa |
This Mona Lisa, which is 30 microns in width, was made by controlling the number of molecules in each pixel. They did this by either heating each pixel (which would increase the concentration and make a lighter cool) or decreasing the temperature (which would do the opposite).
This has been concluded to being the easiest way to manipulate molecules, nanoparticles, and other materials. It is also advantageous because atomic force microscopes (which were used in making it) are fairly common, making this an effective method in industrial and educational labs.
(Source)
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