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September 23, 2010

ChemHacker Scanning Tunneling Electron Microscope Schematics and Source Released

at 5:18 am. Filed under Complex Hacks, Computer Hacks, DIY Hacks, Educational, Electronic Hacks

IMG_1410


Sacha De’Angeli from ChemHacker has released the schematics and source code of the Scanning Tunneling Electron Microscope. The STM is Arduino based and has been a build in progress for quite a long time now. Looks like it is at a great state now! See the Wikipedia page for more generic information about Scanning Tunneling Electron Microscopes.

The STM is based on the concept of quantum tunneling. When a conducting tip is brought very near to the surface to be examined, a bias (voltage difference) applied between the two can allow electrons to tunnel through the vacuum between them. The resulting tunneling current is a function of tip position, applied voltage, and the local density of states (LDOS) of the sample.[4] Information is acquired by monitoring the current as the tip’s position scans across the surface, and is usually displayed in image form. STM can be a challenging technique, as it requires extremely clean and stable surfaces, sharp tips, excellent vibration control, and sophisticated electronics.




 

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4 Responses to “ChemHacker Scanning Tunneling Electron Microscope Schematics and Source Released”

  1. Stan Says:

    From Wikipedia:
    “STM can be a challenging technique, as it requires extremely clean and stable surfaces, sharp tips, excellent vibration control, and sophisticated electronics.”

    So good luck an keep us posted…

  2. Santiago Says:

    ArcAttack led me here here: http://www.geocities.com/spm_stm/Project.html Interestingly is still up, though geocities is out. It’s a very similar project but uses an osciloscope rather than an Arduino-to-Pc ‘visualizer’, at least here where I am, I can have acces to an osciloscope easier than an Arduino… though I haven’t tried to build it myself yet, got tons of things from college. The point is, they’re very similar, so check it out. Greetings from Colombia. O.o

  3. gmc Says:

    So, how does the piezo element & NeoD magnets perform the scanning? (Sorry if I’m being lazy – is late & I just skim-read the article)

    Notice you seem to have 4 wires coming off the piezo – does that flex the element in a kindof X-Y way?

  4. Santiago Says:

    Gmc, check this: http://www.geocities.com/spm_stm/Disk_Scanner_Exp.html Is not from this very project but the one I stated was *very similar.

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