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Anti-vapor-penetration and condensate microdrop self-transport of superhydrophobic oblique nanowire surface under high subcooling

查看全文 作　　者：Rui [1]Wang;Feifei [1]Wu;Fanfei [1]Yu;Jie [1]Zhu;Xuefeng [1,2]Gao;Lei [3]Jiang 高影响力作者 机构地区：[1]Functional Materials and Interfaces Lab,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou,215123,China;[2]School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei,230026,China;[3]Key Laboratory of Bioinspired Smart Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing,100190,China高影响力机构 出　　处：《Nano Research》索引2021年第14卷第5期,共6页高影响力期刊 基　　金：This work was supported by National Key R&D Program of China(No.2017YFB0406100);the National Natural Science Foundation of China(No.21573276);Natural Science Foundation of Jiangsu Province(Nos.BK20170007 and BK20170425). 摘　　要：It is well-known that microscale gaps or defects are ubiquitous and can be penetrated by vapor,resulting in the failure of superhydrophobic effect and undesired condensate flooding under high subcooling.Here,we propose and demonstrate that such problem can be solved by the oblique arrangement of nanowires.Such a structure has been demonstrated to own anti-vapor-penetration and microdrop self-transport functions under high subcooling,unaffected by the microscale gaps.This is because vapor molecules can be intercepted by oblique nanowires and preferentially nucleate at near-surface locations,avoiding the penetration of vapor into the microscale gaps.As-formed microdrops can suspend upon the nanowires and have low solid-liquid adhesion.Besides,oblique nanowires can generate asymmetric surface tension and microdrop coalescence can release driving energy,both of which facilitate the microdrop self-removal via sweeping and jumping ways.This new design idea helps develop more advanced condensation mass and heat transfer interfaces. 关 键 词：SUPERHYDROPHOBIC oblique nanowires anti-vapor-penetration microdrop self-transport
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