Multiple Liquid Manipulations on Patterned Surfaces with Tunable Adhesive Property

Abstract

Micro/nanostructured surfaces with designable wettability show great promise in many fields. This paper reports a new strategy for fabricating superhydrophobic surfaces with tunable water adhesion force by combining multiscale surface structures and mussel‐inspired surface chemistry, which can be used for multiple liquid manipulations. Highly ordered porous films prepared by the breath figure method enable convenient construction of surfaces with honeycomb‐patterned or nanosized pincushion‐like structures. Multiple liquid manipulations including no‐loss transportation of water droplets, water collection, programmable movement of water droplets, and chemical reaction monitoring are demonstrated on the micro/nanostructured surfaces. The proposed method is facile, energy‐efficient, and can be conducted for the preparation of superhydrophobic surfaces with high contrast adhesion patterns.

Expanding the Toolbox of Metal–Phenolic Networks via Enzyme‐Mediated Assembly

“…[12] Importantly,t he diverse building blocks applicable to enzyme-mediated assembly have various functional groups (e.g.,c atechol, amino,a nd thiol), which are useful for secondary,surface-confined reactions to further tailor the surface properties (Figure 4a). [29] Fore xample,o wing to the metalchelating ability of the catechol moieties,t rypsin'-iron coatings could mediate the formation of metal oxides,s uch as nanostructured FeOOH, on the coatings through abiomineralization process.The resulting FeOOH nanorods (Figure 4b) can be used as ah ighly effective photocatalyst for dye degradation under visible light irradiation in the presence of H 2 O 2 . [30] As shown in Figure 4c,the blue color of the methyl blue solution gradually faded upon treatment with the photocatalytic trypsin'-iron coatings,and after 6h,more than 75 %o ft he dye was degraded under visible light irradiation.…”

Superhydrophobic, Self-Cleaning, and Robust Properties of Oriented Polylactide Imparted by Surface Structuring

“…To create a superhydrophobic surface, a nanoscaled structure is simultaneously essential. Hydrophobic nanoparticle modification is a straightforward approach to introduce a nanostructure and low surface-energy composition on the surface. − For instance, Zhong et al prepared superhydrophobic honeycomb-patterned porous polystyrene- b -poly­( N , N -dimethylaminoethyl methacrylate) (PS- b -PDMAEMA) films by the BF method and fluorinated silver nanoparticles, which showed a WCA of 160° and high surface adhesion …”

“…35−37 For instance, Zhong et al prepared superhydrophobic honeycomb-patterned porous polystyrene-b-poly(N,N-dimethylaminoethyl methacrylate) (PS-b-PDMAEMA) films by the BF method and fluorinated silver nanoparticles, which showed a WCA of 160°and high surface adhesion. 38 Herein, we develop a facile surface treatment combining BF method templating and hydrophobic nanoparticle modification to improve the hydrophobicity of oriented PLA films. To obtain enhanced mechanical properties and achieve large-scale production, we exploit a casting-thermal stretching process to obtain oriented PLA films with an excellent stiffness-toughness balance.…”

Self-Assembly of CsPbBr3 Perovskites in Micropatterned Polymeric Surfaces: Toward Luminescent Materials with Self-Cleaning Properties

“…This allows us to obtain a hybrid, porous film with a preferential distribution of CsPbBr 3 NCs inside the pores, typically in less than 2 min (Scheme c). Moreover, the porous films can be further modified by a widely used peeling protocol with Scotch tape, creating pincushion-like structures − (Scheme d).…”