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Tiny QR code achieved using electron microscope technology

https://newatlas.com/technology/smallest-qr-code-bacteria-tu-wien/
16jonbaer | | 10 | HN
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spystath | parent | next
Despite the HN title (and while the focusing optics are similar), the structure in the article was directly milled with an ion beam (FIB), not electrons.
Kiboneu | parent
Yeah. I drew mario on a pin head with a fib in 2015.
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