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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi all.
Just found this page..
Has anyone else tried this? I have some sulphur and also copper PCB material so it should be simple enough.
Might try replacing the aluminium rod with some gallium/indium alloy or even silver paint. In fact nearly any metal other than copper should work here.
Would be amusing to make an analogue memory array out of PCB stock..
It is worth also trying to plate zinc onto copper PCB stock then sulphur treat that, as it seems to show a more linear memristor curve than copper alone which would make a more useful analogue memory.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Not sure. I must be missing a step somewhere because leaving sulphur on PCB stock did nothing. Does it have to be at a certain humidity maybe?
EDIT:- Results. Yeah, needs 60C heating 30 minutes AND humidity to form, reproducible resistance change of +/- 400 ohms at +/- 9V 1K with a point contact. However, if you leave it exposed to room air overnight it detaches from the copper and leaves red oxide in its place, which doesen't exhibit any memristor effect at all. Painting silver ink on there also wrecks it, even if then dried out.
best idea so far (not tried yet) is to use a low melt 59C alloy, epoxy around the edge once formed and once tested add a lid (ie metal) and silicon bead from dessicant pack. Ought to be stable then.
wonder if this can be used to make a memristor "through hole" PCB ?! use double sided drilled board with XY contacts, through holes based on silver ink then rinse with a mild solvent to remove shorts except where wanted and then form the memristors as normal.# Then blast away sulphur with compressed air and encase in resin etc. Might work, certainly would be a cool project to try.
Would probably work better with interdigitated electrodes, made using the laser PCB method. For this application you actually WANT leakage, so making the tracks ridiculously fine would be OK as long as there isn't a direct short.
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Homemade memristors
