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Xuemei Chen, Jun Wu, Ruiyuan Ma, Meng Hua, Nikhil Koratkar, Shuhuai Yao and Zuankai Wang Nanograssed Micropyramidal Architectures for Continuous Dropwise Condensation Advanced Functional Materials 21

Article first published online: 20 SEP 2011 | DOI: 10.1002/adfm.201101302

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A surface with nanograssed micropyramid arrays that allows for enhanced drop nucleation and departure simultaneously is successfully developed by harnessing the heterogeneous wetting and hierarchical roughness. The surface yields a global superhydrophobity as well as local smooth (wettable) patches. Synergistic co-operation between the hierarchical structures contributes directly to a continuous process of nucleation, coalescence, departure, and re-nucleation enabling sustained dropwise condensation over prolonged periods.

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