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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The Intrigue of the Interface
TL;DR: Diverse phenomena, ranging from the way shorebirds feed to self-cleaning by leaves, can be explained through surface tension effects.
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A new replication method for fabricating hierarchical polymer surfaces with robust superhydrophobicity and highly improved oleophobicity
TL;DR: In this paper, the hierarchical aluminum template was obtained by acid etching and subsequent boiling water treatment, and five polymers including acrylonitrile butadiene styrene (ABS), polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), and polyurethane (PU) were demonstrated to successfully replicate the hierarchical morphology of the H-Al.
Journal ArticleDOI
Recent biomedical applications of bio-sourced materials
Abdelrahman Elbaz,Zhenzhu He,Bingbing Gao,Junjie Chi,Enben Su,Dagan Zhang,Songqin Liu,Hua Xu,Hong Liu,Zhongze Gu +9 more
TL;DR: The functions endowed by these structures, such as superhydrophobicity, adhesion, and high strength, enabling them to be employed in a number of applications in biomedical fields, including cell cultivation, biosensors, and tissue engineering are discussed.
BookDOI
Combined Discrete and Continual Approaches in Biological Modelling
TL;DR: Filippov et al. as discussed by the authors introduced the idea of the attraction, which is very common phenomenon for the processes in the Nature, and discussed an evolution in complex potential with a lot of valleys in a multidimensional space accompanied by so-called large river effect, which corresponds to an extremely slow evolution of some, normally close to final, stages of the adaptation.
Journal ArticleDOI
Preparation of stable and durable superhydrophobic surface on Zr-based bulk metallic glass
TL;DR: In this paper, superhydrophobic coral-like structures were prepared on Zr-based bulk metallic glass (BMG) substrates by electrochemical etching in HCl solution and low surface energy modification of fluorosilane.
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.