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Biotemplated hierarchical surfaces and the role of dual length scales on the repellency of impacting droplets
Matthew McCarthy,Konstantinos Gerasopoulos,Ryan Enright,James N. Culver,Reza Ghodssi,Evelyn N. Wang +5 more
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TLDR
In this article, the role of each length scale during droplet impact was investigated by decomposing the micro and nanoscale components of hierarchical superhydrophobic surfaces using the Tobacco mosaic virus and found that 10 µl water droplets rebounded at impact velocities greater than 4.3 µm/s.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.read more
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Pancake bouncing on superhydrophobic surfaces.
TL;DR: By designing surfaces with tapered micro/nanotextures which behave as harmonic springs, the timescales become independent of the impact velocity, allowing the occurrence of pancake bouncing and rapid drop detachment over a wide range of impact velocities.
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Hierarchical or not? Effect of the length scale and hierarchy of the surface roughness on omniphobicity of lubricant-infused substrates
TL;DR: It is shown that lubricant-infused textured surfaces with uniform nanofeatures provide the most shear-tolerant liquid-repellent behavior, unlike lotus leaf-inspired superhydrophobic surfaces, which generally favor hierarchical structures for improved pressure stability and low contact angle hysteresis.
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Role of wickability on the critical heat flux of structured superhydrophilic surfaces
TL;DR: Biological templates have been used to demonstrate that wickability is the single factor dictating CHF on structured superhydrophilic surfaces and provides a framework for designing and optimizing coatings for further enhancement.
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Biomimetic and Bioinspired Synthesis of Nanomaterials/Nanostructures.
Guangtao Zan,Qingsheng Wu +1 more
TL;DR: This review examines the biomimetic and bioinspired synthesis of nanomaterials/nanostructures from five perspectives and discusses the synthesis procedures, basic principles, and relationships of these systems from the following five perspectives.
Condensation heat transfer on superhydrophobic surfaces
Nenad Miljkovic,Evelyn N. Wang +1 more
TL;DR: The Solid State Solar-Thermal Energy Conversion Center (SSEEC) as discussed by the authors is a solid-state solar-thermal energy conversion center at the U.S. Dept. of Energy.
References
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Journal ArticleDOI
Design and Creation of Superwetting/Antiwetting Surfaces
Xinjian Feng,Lei Jiang +1 more
TL;DR: In this paper, a survey of the recent achievements in the construction of surfaces with special wettabilities, such as superhydrophobicity, super-hydrophilicity and superoleophobicity, are presented.
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Transformation of a simple plastic into a superhydrophobic surface.
TL;DR: This work describes a simple and inexpensive method for forming a superhydrophobic coating using polypropylene (a simple polymer) and a suitable selection of solvents and temperature to control the surface roughness.
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Superhydrophobic Carbon Nanotube Forests
Kenneth K. S. Lau,José Bico,Kenneth B. K. Teo,Manish Chhowalla,Gehan A. J. Amaratunga,William I. Milne,Gareth H. McKinley,Karen K. Gleason +7 more
TL;DR: In this paper, the creation of a stable, superhydrophobic surface using the nanoscale roughness inherent in a vertically aligned carbon nanotube forest together with a thin conformal hydrophobic poly(tetrafluoroethylene) (PTFE) coating on the surface of the nanotubes was demonstrated.