title: Sprayable superhydrophobic nano-chains coating with continuous self-jumping of dew and melting frost.
abstract: Spontaneous movement of condensed matter provides a new insight to efficiently improve condensation heat transfer on superhydrophobic surface. However, very few reports have shown the jumping behaviors on the sprayable superhydrophobic coatings. Here, we developed a sprayable silica nano-porous coating assembled by fluorinated nano-chains to survey the condensates' dynamics. The dewdrops were continuously removed by self- and/or trigger-propelling motion due to abundant nano-pores from random multilayer stacking of nano-chains. In comparison, the dewdrops just could be slipped under the gravity effect on lack of nano-pores coatings stacked by silica nano-spheres and nano-aggregates. More interestingly, the spontaneous jumping effect also occurred on micro-scale frost crystals under the defrosting process on nano-chains coating surfaces. Different from self-jumping of dewdrops motion, the propelling force of frost crystals were provided by a sudden increase of the pressure under the frost crystal.
authors.affiliation: Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Shanlin
authors.initials: S
authors.lastname: Wang
authors.affiliation: Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Xinquan
authors.initials: X
authors.lastname: Yu
authors.affiliation: School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China.
authors.forename: Caihua
authors.initials: C
authors.lastname: Liang
authors.affiliation: Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Youfa
authors.initials: Y
authors.lastname: Zhang