Anyone more qualified than me care to comment on whether the picture in figure 1c, which shows what appear to be pure copper islands on the outside of the material, supports the idea of a heterogenous material in that the reaction either wasn't complete or resulted in impure output?
Successful room temperature ambient-pressure magnetic levitation of LK-99
611–620 of 1001 posts
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#612Earlier quoted context omitted.
I still don't understand 0D and 1D. Quantum dots, nanoparticles.. are they really 3D but too small to measure?
1D just means it conducts in one direction. Like it's got tiny wires in it. It's not particularly unusual; anisotropic conductive adhesive is used in your cellphone to glue the screen on. They tape over the electrical pads, then line up the corresponding LCD pads. The tape allows current to flow vertically between the pads, but for adjacent pads it's insulating. Neodymium magnets are another example. They're made up…
But that's an artifact of using two materials in alternation, not an artifact of one material showing 1d conduction.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#613One somewhat ironic fact of this story is that the rogue former employee perhaps deserves some credit for bringing this thing out into the world. They had been working on this for quite a long time themselves, rightfully so. But now the whole world is working on it and exploring other methods and combinations of materials I would assume (to improve upon the original design and avoid any patents). How long would they…
Exactly, the 99 stands for 1999, so potentially this material has existed for over 20 years and we could have started testing and replication on a much wider scale a decade ago. What benefit have we gained by disseminating this research so slowly?
maybe they were waiting for some patents to expire?
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#614The Varda Team just posted a really high-resolution video of the diamagnetism: https://twitter.com/andrewmccalip/status/1687405505604734978
Nice! For show, I would try to levitate. Probably using a stronger magnet, inside a small (tiny?) glass tube, so it slides up a bit. I wouldn't do "rock surgery" just yet, to remove dead weight. Levitation with 4 magnets in a checkboard fashion, as usually done for pyrolytic carbon sheets, maybe doesn't work as the sample is not flat.
Also, turning the magnet upside down seems useful. And then, heating up to show that it drops at a certain temperature. I wonder what would be needed in this case; I guess less than 100° C.
In any case, the "show" part is important. Good video quality is important.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#615The Varda Team just posted a really high-resolution video of the diamagnetism: https://twitter.com/andrewmccalip/status/1687405505604734978
Finally a video with quality that doesn't look like it was filmed with a camcorder from the early 2000s.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#616Earlier quoted context omitted.
There are diamagnetic non-superconductors like pyrolytic graphite that can also evade Earnshaw's theorem, but this would be the first metal with this strength of diamagnetism at room temperature AFAIK.
Pyrolitic graphite can evade Earnshaw's theorem only with either specific magnet array shapes or with rotation, they still can't stably levitate on a regular dipole without rotation.
It can be done at all with a static arrangement of magnetic fields, though? Ooh.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#617Earlier quoted context omitted.
This reminds me of an Asimov novel (don't remember the name) In this universe there are long life humans that don't really collaborate with other humans (like a single person, not a group of quasi immortal humans) in the scientific field to have all the credit because who cares if you take 200 years for a discovery if the glory is all yours
Maybe The Naked Sun or one of the books in that series? It’s been years since I read it but I remember there being some motif about people not interacting physically and living a long time.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#618Earlier quoted context omitted.
Exactly, the 99 stands for 1999, so potentially this material has existed for over 20 years and we could have started testing and replication on a much wider scale a decade ago. What benefit have we gained by disseminating this research so slowly?
This reminds me of an Asimov novel (don't remember the name) In this universe there are long life humans that don't really collaborate with other humans (like a single person, not a group of quasi immortal humans) in the scientific field to have all the credit because who cares if you take 200 years for a discovery if the glory is all yours
It's second or more likely third book in Robot series.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#619Korean scientists embody key cultural values: (Jeong) fosters deep bonds and commitment to their work; (In-gan-mi) encourages inherent honesty and sincerity; (Che-Myun) upholds honor, discouraging dishonesty; and Confucianism instills respect, loyalty, and duty. These values shape their dedication to research integrity and professional conduct. I choose to believe!
Yeah, nah https://en.wikipedia.org/wiki/Hwang_affair National pride and science are not a very good mix
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Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#620For newbies, what's the potential impact of this discovery? Electronics? Better electrical stuff in general? What else?