Mobile phones from a few decades ago look like antiquated plastic toys today. That’s an example of the dramatic miniaturization of modern electronics, as well as added functionality. Unfortunately, this miniaturization comes with a problem: the challenge of dissipating heat. This challenge limits the functionality of ultra-small electronic devices. For practical applications, the solution to heat dissipation must incorporate a means of modulating the temperature at which the device changes its speed of heat transmission.
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Source: Phys.org