Biotemplated hierarchical surfaces and the role of dual length scales on the repellency of impacting droplets
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Wang_Biotemplated hierarchical.pdf
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Author(s)
McCarthy, Matthew
Gerasopoulos, Konstantinos
Enright, Ryan
Culver, James N.
Ghodssi, Reza
Wang, Evelyn N.
Date Issued
June 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
McCarthy, Matthew, Konstantinos Gerasopoulos, Ryan Enright, James N. Culver, Reza Ghodssi, and Evelyn N. Wang. Biotemplated Hierarchical Surfaces and the Role of Dual Length Scales on the Repellency of Impacting Droplets. Applied Physics Letters 100, no. 26 (2012): 263701. © 2012 American Institute of Physics
Version
Final published version
Abstract
We fabricated biomimetic hierarchical superhydrophobic surfaces using the Tobacco mosaic virus and investigated the role of each length scale during droplet impact by decomposing the micro and nanoscale components. We found that 10 μl water droplets rebounded at impact velocities greater than 4.3 m/s on the hierarchical surfaces, outperforming the nanostructured surfaces, which underwent an observable wetting transition at an impact velocity of 2.7 m/s. This finding demonstrates that each length scale plays a distinct, but complementary, role in maximizing water repellency during droplet impact and, thus, provides insight into the evolutionary development of highly water-repellant hierarchical plant leaves.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4729935
