Tough Reversible Adhesion Properties of a Dry Self-Cleaning Biomimetic Surface

ACS Applied Materials & Interfaces
Ming LiZhenhai Xia

Abstract

Geckos have one of the world's most efficient reversible adhesion systems. Even walking in dusty conditions, geckos can dislodge up to 80% of contaminants and recover their adhesion capability after walking as few as four steps. Thus far, artificial dry self-cleaning materials inspired by the geckos' hierarchical fibrillar structure have been only able to remove 55% of collected large particle contaminants with 30 steps. Challenges, including low mechanical strength, low stiffness, and short fatigue time keep these materials from being used in practical applications. This study involves the novel fabrication of dry self-cleaning surfaces with a high mechanical performance and an outstanding dry self-cleaning property. Imposing a load-drag-pull process similar to a gecko's foot adhesion process, our biomimetic surfaces could dislodge up to 59% of microparticles (∼8 μm) with as few as five steps. Furthermore, the surface had an excellent screening ability at low temperatures regardless of the surface roughness similarity. The surfaces were also proven to be scratch resistant. The biomimetic surfaces exhibit enhanced dry self-cleaning and mechanical properties and could be promising in applications such as reusable adhesives, bioc...Continue Reading

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Citations

Jun 16, 2021·Journal of the Royal Society, Interface·Chang LiEduardo Saiz
Jul 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaohang LuoQuan Xu
Aug 11, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Huazhen AnShaohua Chen
Mar 9, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Weijun LiQuan Xu
Apr 17, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Pei ChenQuan Xu
Jan 20, 2021·ACS Biomaterials Science & Engineering·Qianni WuXi Xie

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