Abstract

In recent years, biomimetic materials inspired from natural organisms have attracted great attention due to their promising functionalities and cutting-edge applications, emerging as an important research topic. For example, how to reduce the reflectivity of the solid surface and increase the absorption of the substrate surface is essential for developing light response smart surface. Suitable solutions to this issue can be found in natural creatures; however, it is technologically challenging. In this work, inspired from butterfly wings, we proposed a laser processing technology to prepare micro nanostructured titanium alloy surfaces with anti-reflection properties. The reflectivity is significantly suppressed, and thus, the light absorption is improved. Consequently, the anti-reflection titanium alloy surface can be further employed as a photothermal substrate for developing light-responsive slippery surface. The sliding behavior of liquid droplets on the smart slippery surface can be well controlled via light irradiation. This method facilitates the preparation of low-reflection and high-absorption metallic surfaces towards bionic applications.

Highlights

  • Functional materials inspired from the surface structures of organisms show new research trends [1,2,3]

  • Zheng et al proposed a hybrid method consisting of ultra-fast laser-assisted texturing and chemical fluorination treatment to significantly reduce the reflectivity of the titanium alloy surface by creating ultra-light trapping micro-nano structures [32]

  • We propose the laser fabrication of anti-reflection titanium alloy surface and its applications in developing light-responsive slippery surface

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Summary

Introduction

Functional materials inspired from the surface structures of organisms show new research trends [1,2,3]. Zheng et al proposed a hybrid method consisting of ultra-fast laser-assisted texturing and chemical fluorination treatment to significantly reduce the reflectivity of the titanium alloy surface by creating ultra-light trapping micro-nano structures [32]. In spite of these pioneering works, innovations on rational design and fabrication of anti-reflective micro-nano structures through a biomimetic manner are still highly desired. The anti-reflection titanium alloy surface is employed as a photothermal substrate to prepare a light-responsive slippery surface, which can be used to control the sliding behavior of liquid droplets This method enables the preparation of anti-reflection and high-absorption metal surfaces, revealing great potential for applications in bionic devices and microfluidics

Sample Preparation
Butterfly Wings Model
Surface Microscopy
Wettability
Conclusions
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