The discovery, published in Science, suggests that graphite, and perhaps its high-performance relative, graphene, may efficiently remove heat in microelectronic devices in a way that was previously unrecognized.
Image: Christine Daniloff
Posted on 03/16/2019 4:12:49 AM PDT by zeestephen
At temperatures of 120 kelvin, or -240 degrees Fahrenheit, they saw clear signs that heat can travel through graphite in a wavelike motion. Points that were originally warm are left instantly cold, as the heat moves across the material at close to the speed of sound. The behavior resembles the wavelike way in which sound travels through air, so scientists have dubbed this exotic mode of heat transport "second sound."
(Excerpt) Read more at wattsupwiththat.com ...
The discovery, published in Science, suggests that graphite, and perhaps its high-performance relative, graphene, may efficiently remove heat in microelectronic devices in a way that was previously unrecognized.
Image: Christine Daniloff
“...suggests that graphite, and perhaps its high-performance relative, graphene, may efficiently remove heat...”
Global warming solved! The Earf can just slip on a graphene car coat.
At 120 Kelvin, a loud sound has about the same amount of energy as the “heat wave” they’ve detected.
As Sheldon said several years ago ‘It’s a wave!’ Now would be the time for applause!
“What is the speed of cold?”
(Paraphrasing Steven Wright)
Thanks zeestephen.
Whenever I read classic literature, I wonder what else is going on besides great composition.
Thanks for the bump!
(Paywall: http://science.sciencemag.org/content/early/2019/03/13/science.aav3548 )
The Arxiv version of the article describing the experimental set up, with nice graphs. (It is mainly non-technical) https://arxiv.org/ftp/arxiv/papers/1901/1901.09160.pdf
There will probably be a lot of applications, check this https://en.wikipedia.org/wiki/Second_sound in a couple of months.
What's next? Graphene containment buildings ('the wall') for fusion reactors?
:^ ) My pleasure. And I’m resisting the temptation of posting a link to Martha Reeves and the Vandellas’ “Heat Wave”.
Thanks AdmSmith.
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