Figure 1 When cooled by an applied fluid flow, a heated diode increases its forward voltage. Advertisement. You can use this effect to make a novelty electronic candle as shown in Figure 2a. By ...

Thermal diodes, much like their electrical counterparts, provide unidirectional heat transfer, allowing heat to flow in one direction while blocking it in the reverse.

2. Experimental setup of the bridging-droplet thermal diode. (a) Photograph of the wicked copper plate possessing an array of wetted micropillars of dimensions 100 × 100 × 600 μm.