Journal ArticleDOI
Superhydrophobic gecko feet with high adhesive forces towards water and their bio-inspired materials
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TLDR
This work expects this work will provide the inspiration to reveal the mechanism of the high-adhesive superhydrophobic of geckos and extend the practical applications of polyimide materials.Abstract:
Functional integration is an inherent characteristic for multiscale structures of biological materials. In this contribution, we first investigate the liquid–solid adhesive forces between water droplets and superhydrophobic gecko feet using a high-sensitivity micro-electromechanical balance system. It was found, in addition to the well-known solid–solid adhesion, the gecko foot, with a multiscale structure, possesses both superhydrophobic functionality and a high adhesive force towards water. The origin of the high adhesive forces of gecko feet to water could be attributed to the high density nanopillars that contact the water. Inspired by this, polyimide films with gecko-like multiscale structures were constructed by using anodic aluminum oxide templates, exhibiting superhydrophobicity and a strong adhesive force towards water. The static water contact angle is larger than 150° and the adhesive force to water is about 66 μN. The resultant gecko-inspired polyimide film can be used as a “mechanical hand” to snatch micro-liter liquids. We expect this work will provide the inspiration to reveal the mechanism of the high-adhesive superhydrophobic of geckos and extend the practical applications of polyimide materials.read more
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Bioinspired Surfaces with Superwettability: New Insight on Theory, Design, and Applications
TL;DR: Design, and Applications Shutao Wang,“, Kesong Liu, Xi Yao, and Lei Jiang*,†,‡,§ †Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry, and ‡Beijing National Laboratory for Molecular Science.
Journal ArticleDOI
Bioinspired Interfaces with Superwettability: From Materials to Chemistry
TL;DR: The evolution of superwettable materials is introduced, and the fundamental rules for building these superwetting materials will be discussed, followed by a summary of recent progress in the application of superWettability materials to alter the behaviors of chemical reactants and products.
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Bio-inspired superoleophobic and smart materials: Design, fabrication, and application
TL;DR: In this article, the authors focus on recent research progress in the design, fabrication, and application of bio-inspired superoleophobic and smart surfaces, including super-oleophobic-superhydrophobic surfaces, oleophobic-hydrophilic surfaces, underwater superoleophoric surfaces, and smart surface.
Journal ArticleDOI
Superhydrophobic and superoleophobic properties in nature
TL;DR: In this article, the authors report on superhydrophobic and superoleophobic properties found in nature, which are strongly expected to benefit various potential applications, such as insects with colored structured wings or insects with antifogging and anti-reflective eyes.
Journal ArticleDOI
Recent developments in polydopamine: an emerging soft matter for surface modification and biomedical applications
TL;DR: This review can provide important and timely information regarding mussel-inspired chemistry and will be of great interest for scientists in the chemistry, materials, biology, medicine and interdisciplinary fields.
References
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Purity of the sacred lotus, or escape from contamination in biological surfaces
TL;DR: It is shown here for the first time that the interdependence between surface roughness, reduced particle adhesion and water repellency is the keystone in the self-cleaning mechanism of many biological surfaces.
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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.
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Characterization and Distribution of Water-repellent, Self-cleaning Plant Surfaces
TL;DR: The importance of roughness and water-repellency, respectively, as the basis of an anti-adhesive, self-cleaning surface, in comparison to other functions of microstructures, is discussed.
Journal ArticleDOI
Adhesive force of a single gecko foot-hair
Kellar Autumn,Yiching A. Liang,S. Tonia Hsieh,Wolfgang Zesch,Wai Pang Chan,Thomas W. Kenny,Ronald S. Fearing,Robert J. Full +7 more
TL;DR: The first direct measurements of single setal force are reported by using a two-dimensional micro-electro-mechanical systems force sensor and a wire as a force gauge and revealed that a seta is ten times more effective at adhesion than predicted from maximal estimates on whole animals.