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. 2016 Apr 1;6:23760. doi: 10.1038/srep23760

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(a) Heat flux versus wall superheat for a bare surface, homogeneous ZnO surface, polymer dots, and two heterogeneous surfaces with 150–500 μm and 75–500 μm configurations. (b) Corresponding heat transfer coefficient of tested boiling surfaces as a function of superheat. All enhanced surfaces show improved heat transfer at low superheat compared to the bare surface.