Gas station without pumps

2021 August 23

Final 3D-printed “quantum dot”

Filed under: Uncategorized — gasstationwithoutpumps @ 14:44
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In 3D-printed “quantum dot” and 3D-printed “quantum dot” revisited, I wrote about my attempts to 3D-print the image from https://scitechdaily.com/direct-visualization-of-quantumdots-reveals-shape-of-quantum-wave-function-of-the-trapped-electrons/.

I finally got good prints from the resin printer at work (they had to clean the optics on the printer) and a decent print of the “stage jewelry” version on my Monoprice Delta Mini printer. I gave away all the prints (including the failed ones) to the physicists who provided the data, except for the one best print in each size.

The STL files from OpenSCAD are ridiculously large (17.8MB and 19.1MB), but they can be reduced using https://myminifactory.github.io/Fast-Quadric-Mesh-Simplification/ without much loss of detail to under 1MB.

The OpenSCAD program, scaled data file, and two STL files are available at https://www.thingiverse.com/thing:4939939

quantum6-360

Here is the resin print, which is 50mm in diameter. The peaks come out clean and sharp, but my only color choices were black and clear (the only two resins BELS had).

quantum6-360-back

The back of the print has the scaling information, but even with sanding the spots from the supports are annoyingly visible.

quantum6-720

The stage jewelry version is twice as big, with a diameter of 100mm (I measured it at 104mm—I think my printer calibration may be a bit off).

quantum6-720-back

Again, the back has the scaling information. Using “concentric” for the bottom layers made for some interesting patterning.

small-and-large-quantum6

Here are the two quantum-dot pendants side-by-side, to show the relative sizes.

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