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Make your own scanning electron microscope? Easy for Ben Krasnow who has already made a liquid nitrogen generator or a transcranial magnetic stimulation system.
For his new achievement, he explains: “I wanted to see if it was possible! And it was!
The graduate of the University of California at Santa Barbara therefore began to study the complex and delicate physics involved in an instrument of this type. He then scoured eBay for cheap components, and built what he couldn't find himself.
One of the difficult tasks in this construction was to produce an electron gun. To do this he used a thin tungsten wire that he heated by applying a very high voltage to it, which produced an electron cloud. To focus this cloud in a precise trickle, the liberated electrons then pass through a tiny copper pipe before reaching their target.
The microscope allows a 3D view of the surface of objects with a 50x zoom, displayed on a conventional oscilloscope.
Source: Lemon squeezer
Find out more: benkrasnow.blogspot.com/2011/03/diy-scanning-electron-microscope.html
