Humidity-Modulated Core–Shell Nanopillars for Enhancement of Gecko-Inspired Adhesion
Source abstract
Abstract
The contribution of water to gecko and gecko-inspired adhesion remains a debate. Here, by investigating the adhesion performances of gecko-inspired nanopillar arrays in humid environments, the function of water in dry adhesion is discussed. Adhesion increases with the increase of relative humidity for both hydrophilic and hydrophobic nanopillar arrays. The superficial layer of both kinds of nanopillars are softened by water, forming a kind of “soft shell–stiff core” structure. The core–shell structure reduces the stress at contact perimeter, enlarges the cohesive zone, and increases the tolerance to misalignment on contacting surfaces, contributing to the enhancement of normal adhesion. The result suggests a mechanism for the function of water in gecko and gecko-inspired dry adhesions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adhesion, Friction, and Surface Interactions · Surface Modification and Superhydrophobicity · Polymer Surface Interaction Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Power and Mechanical Engineering, The Institute of Technological Science, Wuhan University, South Donghu Road 8, 430072 Wuhan, China
Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, 220 S. 33rd Street, 19104-6315, Philadelphia, United States
Institut für Chemie neuer Materialien, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany
Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Am Botanischen Garten 9, 24098 Kiel, Germany
Funding
Ministry of Science and Technology of the People's Republic of China · Division of Civil, Mechanical and Manufacturing Innovation · National Natural Science Foundation of China
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