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Anisotropism of the Non-Smooth Surface of Butterfly Wing
  • 时间：0
  • 分类：Q964[生物学—昆虫学]
  • 相关基金：supported by the National Natural Science Foundation of China (Grant No. 50635030);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20040183048);the Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry
  • 相关项目：机械仿生耦合设计原理与关键技术
关键词： micro-/nano-structure, anisotropism, SELF-CLEANING, SUPER-HYDROPHOBICITY, SLIDING, ANGLE
中文摘要：

Twenty-nine species of butterflies were collected for observation and determination of the wing surfaces using a ScanningElectron Microscope(SEM).Butterfly wing surface displays structural anisotropism in micro-,submicro- and nano-scales.Thescales on butterfly wing surface arrange like overlapping roof tiles.There are submicrometric vertical gibbosities,horizontallinks,and nano-protuberances on the scales.First-incline-then-drip method and first-drip-then-incline method were used tomeasure the Sliding Angle(SA)of droplet on butterfly wing surface by an optical Contact Angle(CA)measuring system.Relatively smaller sliding angles indicate that the butterfly wing surface has fine self-cleaning property.Significantly differentSAs in various directions indicate the anisotropic self-cleaning property of butterfly wing surface.The SAs on the butterfly wingsurface without scales are remarkably larger than those with scales,which proves the crucial role of scales in determining theself-cleaning property.Butterfly wing surface is a template for design and fabrication ofbiomimetic materials and self-cleaningsubstrates.This work may offer insights into how to design directional self-cleaning coatings and anisotropic wetting surface.

同期刊论文项目
机械仿生耦合设计原理与关键技术
期刊论文 174 获奖 5 著作 1
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