Introducing Boron Buckyballs

A buckminsterfullerene, also known as a buckyball, is typically a fullerene consisting of sixty carbon atoms (C60) arranged in a way that resembles a football-like sphere. Extending this arrangement to other types of atoms has until now however proven as elusive as finding non-carbon-based lifeforms. In a paper by [Hyun Wook Choi] et al. and published in Chemical Science the discovery of boron buckyballs is detailed. There is also a soft-paywalled article in the Chemical & Engineering News magazine for a higher-level perspective.

The discovered boron-based buckyball ups the number of atoms to eighty, forming B80 (boron fullerite) with a slightly larger diameter than C60 at 0.85 nm versus 0.71 nm. Perhaps more interesting are the claims by the authors that boron fullerite may have more practical applications than its carbon-based cousin, mostly due to it being predicted to be a semiconductor with an 0.8 eV energy gap and better electron acceptance that provides interesting doping prospects.

Producing these boron structures used laser vaporization with a helium carrier gas that was seeded with argon to increase cooling efficiency. Inside this boron cluster the reported structures were then discovered and characterized as described in the paper.

Obviously, going from a fascinating laboratory discovery to bulk production won’t be easy, and the predicted properties of boron fullerite may turn out to be incomplete or have a dark side that we aren’t aware of. Regardless, they’re bound to be more useful at least than the carbon version that’s remained mostly a curiosity despite many years of research.

Art of 3D printer in the middle of printing a Hackaday Jolly Wrencher logo

Microsculptures 3D Printed With Advanced Macromolecular “Inks”

When we think about 3D printing, our mind often jumps to hot nozzles squirting out molten plastic. Other popular techniques include flashing bright light into resin, or using lasers to fuse together metal powders. All these techniques are great at producing parts with complicated geometries at desktop scales.

However, it’s also possible to 3D print at altogether microscopic scales. Researchers in Germany have now developed advanced macromolecular “inks” that can be used to create microscopic 3D sculptures with finer control than ever before.

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Animated LED Buckyball

This animated LED buckyball has little to do with modeling a carbon molecule but a lot to do with adding some excitement to your party decor. [Tim] felt that the LED cube hacks had run their course, so took on the challenge of a sphere made out of pentagonal and hexagonal components instead.

As with many LED projects, finding a good diffuser is paramount. [Tim] decided to go with hot glue sticks, which do a great job of both diffusing, and piping the light from RGB LEDs. The unintended consequence of this choice is that the shape sags under the weight of 90 glue cylinders.

At the end of each glue segment you’ll find a tiny surface-mount RGB LED and controller combo. This is [Tim’s] own design and in bulk it gets the cost of each node down to about one dollar. With the help of a soccer ball as an assembly jig he finished off the construction and wrote some code to produce the eye-pleasing animations seen after the break.

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