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I can try an ELI5: We have previously seen that a form of graphite with impurities demonstrates superconductive behaviors to some degree at very tiny, inconsist
by Tadpole9181 3y ago
I can try an ELI5: We have previously seen that a form of graphite with impurities demonstrates superconductive behaviors to some degree at very tiny, inconsistent scales. They came up with an idea on the physics of why this happens to this material and have managed to intentionally reproduce the effects at a larger scale where we can say this is a genuine property of the material and not a weird localized effect on a tiny fraction of it in certain conditions.
The best I can explain the actual physics would be that some interactions at the impurities cause electrons to form "wires" of superconductivity in one axis across them. This isn't unheard of in existing materials, but the problem is that in those materials they tend to be isolated "wires" and even tiny disturbances throw the whole thing off.
But that in this material, the way these impurities forms creates a mesh of these "wires" where charge/magnetism can jump. Subsequently, it's resistance to disturbances climbs dramatically, as alternative superconductive paths can be taken as any disturbance propogates through a given part of the material.
They now believe we can use this knowledge to intentionally construct even more materials with this behavior.
And because I never stop finding it hilarious... Part of the preparation of the material is repeatedly taking a piece of scotch tape to a thin strip of the graphite, removing the top layer to make it extra thin.
The parts of my comment that are not quotes are just reasons to not immediately dismiss it, like many other "keystone" technology discoveries.
- bagels 3y agoThe scotch tape bit is fun. You can apparently strip atom thick layers of things with scotch tape, and also generate x-rays with it. https://www.technologyreview.com/2008/10/23/217918/x-rays-made-with-scotch-tape https://www.technologyreview.com/2008/10/23/217918/x-rays-ma...
- thereddaikon 3y agoIsn't that also how Graphene is made?
- observationist 3y agoGraphene is made in various ways, ranging from scotch tape (relatively large crystals), to ultrasonic dispersion of graphite in water and soap (tiny microscopic flakes) to vapor deposition for large films, and all sorts of other variations of those themes depending on what you want. Flakes are trivially produced and are starting to be used as additives for desirable structural, electrical, and chemical effects. Graphene was initially created using scotch tape, however, and it remains a reliable and simple method of getting high quality graphene for lab experiments.