title: Activating the microscale edge effect in a hierarchical surface for frosting suppression and defrosting promotion.
abstract: Despite extensive progress, current icephobic materials are limited by the breakdown of their icephobicity in the condensation frosting environment. In particular, the frost formation over the entire surface is inevitable as a result of undesired inter-droplet freezing wave propagation initiated by the sample edges. Moreover, the frost formation directly results in an increased frost adhesion, posing severe challenges for the subsequent defrosting process. Here, we report a hierarchical surface which allows for interdroplet freezing wave propagation suppression and efficient frost removal. The enhanced performances are mainly owing to the activation of the microscale edge effect in the hierarchical surface, which increases the energy barrier for ice bridging as well as engendering the liquid lubrication during the defrosting process. We believe the concept of harnessing the surface morphology to achieve superior performances in two opposite phase transition processes might shed new light on the development of novel materials for various applications.
authors: Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China.
authors: Xuemei
authors: X
authors: Chen
authors: Ruiyuan
authors: R
authors: Ma
authors: Hongbo
authors: H
authors: Zhou
authors: Xiaofeng
authors: X
authors: Zhou
authors: Lufeng
authors: L
authors: Che
authors: Shuhuai
authors: S
authors: Yao
authors: Zuankai
authors: Z
authors: Wang
mesh_terms: D017276:Friction; D007053:Ice / Q000032:analysis*; D008420:Manufactured Materials; D008422:Materials Testing; D044367:Phase Transition; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D007053:Ice; D014867:Water
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