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
Citations
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Wetting against the nap – how asperity inclination determines unidirectional spreading
TL;DR: In Gibbs pinning non-linearities play a major role and it is found that simple line averaging cannot account for this evolution except for weak surface perturbations, i.e. large inclinations.
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Water-repellent surfaces of metallic glasses: fabrication and application
TL;DR: In this paper, a variety of fabrication approaches including thin film MG coating and bulk MG surface patterning as well as other potential methods based on manipulation of one-dimensional MGs are presented.
Journal ArticleDOI
Tuning the superhydrophobicity of magnesium stearate decorated ZnO porous structures for self-cleaning urinary coatings
TL;DR: In this paper, a super-hydrophobic coating comprising of porous ZnO and magnesium stearate (MgSt2) was developed by cost-effective drop casting technique.
Journal ArticleDOI
Biometamaterial: dark ultrathin gold film fabricated on taro leaf
TL;DR: In this paper, a metamaterial of gold thin films was fabricated on a taro leaf surface, used as a template, and the surface was shown to have great light-absorption at the visible wavelengths.
Journal ArticleDOI
Color Modulation in Morpho Butterfly Wings Using Liquid Crystalline Elastomers
Isabella De Bellis,Bin Ni,Daniele Martella,Daniele Martella,Camilla Parmeggiani,Camilla Parmeggiani,Patrick Keller,Diederik S. Wiersma,Diederik S. Wiersma,Min-Hui Li,Min-Hui Li,Sara Nocentini +11 more
TL;DR: The study of evolutionarily optimized solutions of animals and plants is used in biologically inspired engineering to find inspiration for the development of better devices and technology as mentioned in this paper, which is provided by the nano-architecture of the butterfly wings.
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.