phys.org/news/2018-09-nanoparticle-superstructures-pyramid-shaped-blocks.html
This is from nine months ago.
Quote:
Researchers from Brown University have assembled complex macroscale superstructures from pyramid-shaped nanoparticle building blocks. The research, described in the journal Nature, demonstrates a promising new way to bring the useful properties of nanoparticles to macroscale materials and devices.
"There's been a lot of research in making superstructures from spherical nanoparticles, but much less using tetrahedral building blocks," said Ou Chen, an assistant professor of chemistry at Brown and senior author of the study. "Tetrahedra open the possibility of making much more complex structures, and the 3-D superstructure we demonstrate here is one of the most complex ever assembled from single nanoparticle components."
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They're using nano-scale structures to create moire patterns at the meso-scale.
They are [following/stumbling along in] Bucky Fuller's footsteps. His
Synergetic Geometry gets you from tetrahedrons to spheres, with an isotropic vector matrix in between.
Synergetics uses a fundamental module of a 1/4-tetrahedron.
Useful backgrounder here:
Beyond Flatland
The Brown University researchers use chemical bonding to control face selection. How the ligands relate to edge lengths I have no idea.
Synergetics cuts through the Cartesian box and exposes the geometry that our Consensus Reality simulation runs on. The OS as it were.