A study on the dynamic behaviors of water droplets impacting nanostructured surfaces | Zendy

Geunjae Kwak | Zendy; Dong Woog Lee | Zendy; In Seok Kang | Zendy; Kijung Yong | Zendy

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A study on the dynamic behaviors of water droplets impacting nanostructured surfaces

Author(s) -

Geunjae Kwak,

Dong Woog Lee,

In Seok Kang,

Kijung Yong

Publication year - 2011

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.3662046

Subject(s) - wetting , nanostructure , materials science , superhydrophilicity , surface energy , wetting transition , nanotechnology , weber number , nanowire , solid surface , deposition (geology) , alkyl , chemical physics , chemical engineering , composite material , chemistry , mechanics , reynolds number , physics , organic chemistry , paleontology , engineering , sediment , biology , turbulence

We have investigated the influence of impact velocity and intrinsic surface wettability of nanostructures on the impact dynamic behaviors of water droplets on nanostructure surfaces. Nanowires array surfaces with tunable wettabilities ranging from superhydrophilic to superhydrophobic were fabricated by the deposition of surface modifiers differing in alkyl chain length. The transition criteria of rebound/wetting state and rebound/splashing state based on the relationship between the Webber (We) number and the surface free energy were determined. We have confirmed that the critical We number that determines the transition of the rebound/wetting increased as surface energy decreased. Additionally, the We number at which fragmentation occurred on our superhydrophobic surface was relatively low compared to previously reported values

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