Clustered Ribbed-Nanoneedle Structured Copper Surfaces with High-Efficiency Dropwise Condensation Heat Transfer Performance | Zendy

Jie Zhu | Zendy; Yuting Luo | Zendy; Jian Tian | Zendy; Juan Li | Zendy; Xuefeng Gao | Zendy

Open Access

Clustered Ribbed-Nanoneedle Structured Copper Surfaces with High-Efficiency Dropwise Condensation Heat Transfer Performance

Author(s) -

Jie Zhu,

Yuting Luo,

Jian Tian,

Juan Li,

Xuefeng Gao

Publication year - 2015

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.5b02376

Subject(s) - materials science , nanoneedle , coalescence (physics) , copper , nucleation , condensation , heat transfer , heat transfer enhancement , thermal management of electronic devices and systems , nanotechnology , surface energy , enhanced heat transfer , thermal , heat transfer coefficient , composite material , thermodynamics , mechanical engineering , nanostructure , metallurgy , engineering , physics , astrobiology

We report that the dropwise condensation heat transfer (DCHT) effectiveness of copper surfaces can be dramatically enhanced by in situ grown clustered ribbed-nanoneedles. Combined experiments and theoretical analyses reveal that, due to the microscopically rugged and low-adhesive nature of building blocks, the nanosamples can not only realize high-density nucleation but constrain growing condensates into suspended microdrops via the self-transport and/or self-expansion mode for subsequently self-propelled jumping, powered by coalescence-released excess surface energy. Consequently, our nanosample exhibits over 125% enhancement in DCHT coefficient. This work helps develop advanced heat-transfer materials and devices for efficient thermal management and energy utilization.

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