amogus-scale features now possible at fafo
(behold, the sharpie lift-off process: scribble your substrate with a sharpie, deposit Al, dissolve sharpie with acetone)
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@fafo@social.fa-fo.de
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Joined July 26, 2024
big succ doesn't want you to know this, but you can just put petg 3d prints in a vacuum chamber and blast them with aluminium
Did we just made a Schottky diode?
Al on n-doped Si. Random Fe contacts to Al and Si to measure. Positive lead to Si, negative to Al.
X = V (2V per division)
Y = I (100mA per 1V, so 5mA per division.)
(the I/V curve is a composite image of two waveforms)
Si has its protective oxide layer forcefully removed using abrasive methods (ie. sandpaper [!] - still working on being able to handle HF safely).
Not sure if it matters, but the Al is thermally evaporated aluminum foil from EDEKA.
fafo logistics: "poor decisions, delivered fast"
beans
vacuum pump mayoinnaise
Replying to
Time for a FAFO Special: a 3D printed ISO KF to toilet roll adapter... also known as a DIY oil mist filter. At least temporarily. We should probably invest in some real filters that aren't a possible fire hazard.
(toilet roll filter idea by @spirit532, 'engineered' at FAFO, soon coming to a Printables near you..?)
(yes, we take out the inner cardboard)
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On a more serious note: We're currently working on an interferometer for measuring the nanometer-scale displacement by the piezo stack actuators of our scanning tunneling microscope (STM).
To do this without budget, we started working on a 3d-printed system of optomechanics, all designed with @FreeCAD. It works surprisingly well! We'll publish the designs soon, including measurements of their stability performance.
You can read more about the project(s) here: https://wiki.fa-fo.de/projects:optics:start
bonzi buddy is helping
little guy's just vibing
the factory^Wlab must grow
(New room acquired! We're still just setting it up, but it should soon turn into a proper space to hack on lighter stuff and chill in between experiments.)
Replying to
Special thanks to visiting scientist @gigabecquerel who not only brought us some diff pump oil but also helped us get the instrument actually running.
Today at FAFO: hitting rocks (in this case pyrite) with a hammer and then putting it under a SEM.
Replying to
@xeno Yes, I checked already, Fe/Si/Fe seems ohmic, maybe with a _slight_ nonlinearity - but not nearly as pronounced as Fe/Al/Si/Fe above. But it's difficult to get a low resistance path to measure that well right now...
~q3k
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New plan: we're now delayed by 20-30 minutes.
The delay is subject to change. We apologize for the delay.
Thank you for trâwelling with the Deutsche Bahn.
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@StripeyYena Oh don't worry, we also have these two gathering dust, ie. waiting for utilities hookup and general love. We should exchange notes!
Left is a sputter system, right is a combined e-beam/thermal system.
(Maybe we should make a bringup vlog for them?)
OH: fafo? more like snafo
@16af93@wetdry.world @famfo@frogs.lgbt but then again, have you ever seen us in the same room at the same time?