A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response

Abstract

improvements to exciting optical functionality and expands the potential applications of metasurfaces in ever more directions. However, the fragile nano structures are typically highly sensitive to dust and other contaminants, which ultimately limits their wider application. Until now, there is no solution to efficiently clean or protect from the dust contamination on a metasurface that consists of specifically designed antennas. Hence, finding a feasible strategy to clean the metasurface without affecting its optical performance or damage the nanostructures is extremely promising for various practical applications. Furthermore, future development of metasurfaces entails not only continuous efforts to improve the optical performance but also accessible strategies to enhance the device adaptability and effectiveness in complex application conditions. [21][22][23] This means metasurface with enhanced optical performance, physical stability, and smarter functionality are important properties that need to be considered when one designs the device.

Recent advances in prevailing antifogging surfaces: structures, materials, durability, and beyond

“…The top-down approach is mainly based on the definition of patterns. Through laser processing, [72][73][74][75][76] lithography, 77 plasma etching, 78,79 templateassisted method [80][81][82] and other technologies, the patterns can be directly transferred to the substrate material to obtain a functional surface with antifog ability. Compared with the bottom-up method, this method can accurately control the size parameters (e.g., diameter, height, angle) and morphological characteristics (e.g., nanopillar/cone/hole arrays structure, hill/groove microstructure) of the microstructure.…”

Structure–Activity Relationship between the Superhydrophilic Nanowire Structure and the Oil Dewetting Property

“…Utilizing superwettability is the most common way to realize the self-cleaning property. − Superhydrophobic materials with a water contact angle (WCA) greater than 150° rely on the process of water droplets rolling on the surface to dissolve or adhere pollutants to achieve self-cleaning, especially for solid particle pollutants such as dust . The superhydrophilic (WCA less than 10°) materials will spread water droplets into a water film due to their strong affinity for water on the surface and then wash away the pollutants to achieve self-cleaning .…”

Integrated patterned wettability surface for signal expression and efficient photodegradation of multiple water-soluble dyes

“…1 Recently, the field of self-cleaning, anti-icing, oil-water separation and biosensing by studying surface wettability applications has received a lot of attention. [2][3][4][5] However, the integration of multiple functions into a single material still presents great difficulties. For situations where different wettable liquids need to be handled, a combination of multiple materials is often required to achieve this purpose.…”