<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The crescent-shaped microstructure bionic to the slip zone of the slippery zone of the carnivorous plant genus <italic>Nepenthes</italic> was fabricated on the surface of copper foil by laser shock imprinting (LSI). The microstructure of crescent-shaped grooves was initially fabricated on the surface of the micro-mold by etching, and then the microstructure was replicated on the surface of copper foil through plastic deformation under laser shock loading. Increasing the laser shock energy or the number of shocks can increase the degree of replication of the crescent-shaped microstructure, the height of the crescent-shaped microstructure, and the contact angle of water droplets on the surface. The wettability of the surface of the crescent microstructure is anisotropic and increases with an increase in offset distance. The anisotropy of the crescent-shaped microstructure causes the solid–liquid contact line in the direction of the bottom of the arc to become a long and approximately straight line. According to the rule that controlling LSI processing parameters can fabricate surfaces with different heights and wettability, a gradient wetting surface consisting of crescent-shaped microstructures was designed to achieve the directional spreading of droplets. By altering the distribution of crescent-shaped microstructures, a type-I flow channel with the ability to limit the spreading range of water droplets was fabricated.</p>
</abstract>

The crescent-shaped microstructure bionic to the slip zone of the slippery zone of the carnivorous plant genus Nepenthes was fabricated on the surface of copper foil by laser shock imprinting (LSI). The microstructure of crescent-shaped grooves was initially fabricated on the surface of the micro-mold by etching, and then the microstructure was replicated on the surface of copper foil through plastic deformation under laser shock loading. Increasing the laser shock energy or the number of shocks can increase the degree of replication of the crescent-shaped microstructure, the height of the crescent-shaped microstructure, and the contact angle of water droplets on the surface. The wettability of the surface of the crescent microstructure is anisotropic and increases with an increase in offset distance. The anisotropy of the crescent-shaped microstructure causes the solid–liquid contact line in the direction of the bottom of the arc to become a long and approximately straight line. According to the rule that controlling LSI processing parameters can fabricate surfaces with different heights and wettability, a gradient wetting surface consisting of crescent-shaped microstructures was designed to achieve the directional spreading of droplets. By altering the distribution of crescent-shaped microstructures, a type-I flow channel with the ability to limit the spreading range of water droplets was fabricated.

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The crescent-shaped microstructure bionic to the slip zone of the slippery zone of the carnivorous plant genus Nepenthes was fabricated on the surface of...

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Published Online: Feb 22, 2024

Page range: 140 - 158

Received: Oct 11, 2023

Accepted: Jan 09, 2024

DOI: https://doi.org/10.2478/msp-2023-0039

Keywords
laser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread

© 2023 Jie Ji et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Published Online: Feb 22, 2024

Page range: 140 - 158

Received: Oct 11, 2023

Accepted: Jan 09, 2024

DOI: https://doi.org/10.2478/msp-2023-0039

Keywordslaser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread

© 2023 Jie Ji et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
laser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread