Over the last decades, a fabulous variety of synthetic superhydrophobic surfaces have been created, offering unique anti-wetting properties. A significant focus for these surfaces has been on their stay-dry and self-cleaning properties. However, unless in a saturated environment, water droplets lose mass through evaporation and this itself is a field of significant interest, which is illustrated by a flood of recent studies on surface contamination and potential surface transmission of infection by evaporating sessile droplets during the Covid-19 pandemic. Superhydrophobic surfaces alter a droplet's contact with a substrate and the surrounding environment, thus changing pinning and heat transfer properties. The droplet shape also alters the space into which vapor can diffuse. Despite the many excellent reviews on superhydrophobic surfaces, there does not appear to have been a focus on the overlap with evaporating sessile droplets. Here, we address this gap by outlining the diffusion-limited sessile droplet evaporation theory, applications on patterned superhydrophobic surfaces, effect of evaporative cooling on drop evaporation rates, and practical applications of drop evaporation on superhydrophobic surfaces, such as nanoparticle assembly, biomedical assay, analytical chemistry, and crystallization applications. Finally, we provide our personal views of possible future directions in these overlapping areas.
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21 August 2023
Research Article|
August 22 2023
Droplet evaporation on superhydrophobic surfaces
Special Collection:
Superhydrophobic Surfaces
H. Y. Erbil
;
1
Tören Sokak
, No:15, D:13, Levent 34330, Istanbul, Turkey
a)Authors to whom correspondence should be addressed: yildirimerbil1954@gmail.com and glen.mchale@ed.ac.uk
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G. McHale
G. McHale
a)
(Conceptualization, Writing – original draft)
2
Institute for Multiscale Thermofluids, School of Engineering, The University of Edinburgh
, Edinburgh EH9 3FB, United Kingdom
a)Authors to whom correspondence should be addressed: yildirimerbil1954@gmail.com and glen.mchale@ed.ac.uk
Search for other works by this author on:
a)Authors to whom correspondence should be addressed: yildirimerbil1954@gmail.com and glen.mchale@ed.ac.uk
b)
Retired from Gebze Technical University, Chemical Engineering Department, Gebze 41400, Kocaeli, Turkey.
Appl. Phys. Lett. 123, 080501 (2023)
Article history
Received:
May 20 2023
Accepted:
August 08 2023
Citation
H. Y. Erbil, G. McHale; Droplet evaporation on superhydrophobic surfaces. Appl. Phys. Lett. 21 August 2023; 123 (8): 080501. https://doi.org/10.1063/5.0159112
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