Journal ArticleDOI
Directional adhesion of superhydrophobic butterfly wings.
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TLDR
Direction adhesion on the superhydrophobic wings of the butterfly is showed and it is believed that this finding will help the design of smart, fluid-controllable interfaces that may be applied in novel microfluidic devices and directional, easy-cleaning coatings.Abstract:
We showed directional adhesion on the superhydrophobic wings of the butterfly Morpho aega. A droplet easily rolls off the surface of the wings along the radial outward (RO) direction of the central axis of the body, but is pinned tightly against the RO direction. Interestingly, these two distinct states can be tuned by controlling the posture of the wings (downward or upward) and the direction of airflow across the surface (along or against the RO direction), respectively. Research indicated that these special abilities resulted from the direction-dependent arrangement of flexible nano-tips on ridging nano-stripes and micro-scales overlapped on the wings at the one-dimensional level, where two distinct contact modes of a droplet with orientation-tuneable microstructures occur and thus produce different adhesive forces. We believe that this finding will help the design of smart, fluid-controllable interfaces that may be applied in novel microfluidic devices and directional, easy-cleaning coatings.read more
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Bioinspired superwetting surfaces for biosensing
TL;DR: In this article, the authors summarized the recent developments of bio-inspired superwettable surfaces in the field of biosensing and provided an insight of remaining challenges and future development for bioinspired super-wetting materials applied in biosensing.
Journal ArticleDOI
Fabrication of a ZnO nanocolumnar thin film on a glass slide and its reversible switching from a superhydrophobic to a superhydrophilic state
TL;DR: In this article, a simple cost effective way to deposit ZnO thin films on glass slides has been observed under modified hydrothermal (MHT) conditions, where the nanocolumnar growth of zinc sulfate by ethanolamine at 100 °C without employing any templates or surfactants.
Journal ArticleDOI
Super dewetting surfaces: Focusing on their design and fabrication methods
TL;DR: In this paper, the fabrication methods of super-liquid-repellent surfaces comprising the design of suitable surface structure and surface chemical treatment for lowering the surface energy is reviewed, and a detailed discussion of fabrication methods for super dewetting surfaces is presented.
Journal ArticleDOI
Wear behavior of bio-inspired and technologically structured HVOF sprayed NiCrBSiFe coatings
Wolfgang Tillmann,Leif Hagen,Dominic Stangier,Iris-Aya Laemmerhirt,Dirk Biermann,P. Kersting,Eugen Krebs +6 more
TL;DR: In this paper, a NiCrBSiFe self-fluxing alloy is thermally sprayed onto specimens made of AISI M2 high-speed steel (HSS) Technological and bionic surface structures were applied on thermally spray and laser remelted substrates based on ball-on-disk tests, the coefficient of friction was determined and compared for different high velocity oxy fuel (HVOF) sprayed NiCrBiFe coatings and surface textures.
Journal ArticleDOI
Bioinspired Smart Liquid Directional Transport Control.
Yifan Si,Zhichao Dong +1 more
TL;DR: Smart external field-controlled fluid directional transport is the primary focus of this feature article and the views on some outstanding problems, existing challenges, and trends in this field are briefly put forward.
References
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Journal ArticleDOI
Super-hydrophobic surfaces: From natural to artificial
Lin Feng,Shuhong Li,Yingshun Li,Huanjun Li,Lingjuan Zhang,Jin Zhai,Yanlin Song,Biqian Liu,Lei Jiang,Daoben Zhu +9 more
TL;DR: In this article, a super-hydrophobic surface with both a large contact angle (CA) and a small sliding angle (α) has been constructed from carbon nanotubes.
Journal ArticleDOI
Bioinspired surfaces with special wettability
TL;DR: Recent progress in wettability on functional surfaces is reviewed through the cooperation between the chemical composition and the surface micro- and nanostructures, which may bring great advantages in a wide variety of applications in daily life, industry, and agriculture.
Journal ArticleDOI
Super-Water-Repellent Fractal Surfaces
TL;DR: In this article, the authors showed that fractal surfaces can be super water repellent (superwettable) when the surfaces are composed of hydrophobic (hydrophilic) materials.