Physicists Demonstrate a Weird Effect Where Heating Particles Causes Them to Freeze – ScienceAlert

The idea of freezing particles by warming them is counterintuitive, to say the least. But physicists have shown how specially designed mixtures ‘melt’ in the dark but crystallise the moment the lights come on, thanks to their unique thermal activity.
Instead of bouncing the particles around and spreading them out, the researchers showed that by using light to heat up the mixture, they were able to lock particles in place and force them to clump together, as if they were frozen. 
Researchers fr…

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