Electrical-potential induced surface wettability of porous metallic nanostructures

Hierarchically porous micro/nanostructured copper surfaces with enhanced antireflection and hydrophobicity

“…According to the equation, the f 2 value of the superhydrophobic Cu surface is estimated to be 0.874 (Â A = 151.0 • ), suggesting that the air occupies about 87.4% of the contact area between the water droplet and the Cu surface, further proving that the micro/nanostructured surface accounts for the superhydrophobic behaviors of Cu foil. It is believed that the superhydrophobic surface can easily trap a large amount of air among the hierarchically porous micro/nanostructures [18,36]. Such an air dielectric can inhibit the electron transfer between the electrolyte and the Cu substrate, improving the corrosion resistance of the Cu foil.…”

The Effect of Surface Wettability and Coalescence Dynamics in Catalytic Performance and Catalyst Preparation: A Review

“…Inspired by this basic and vital work, the subsequent researcher gradually paid more attention to the tunable porous surfaces (Figure a) for obtaining controllable wettability, and the effect of porous structure on wettability was investigated in detail. Kim et al . have studied the effect of the pore size on the wettability of the water droplet.…”

“… (a) SEM images of PMN with different pore sizes: 154 nm, 258 nm, and 379 nm, (b) contact angle of the water droplet. Error bars show±1 standard deviation . Reproduced with permission from Ref.…”

Morphology-influenced wetting model of nanopore structures

“…The air pockets affect the depth of the absorbing water droplet on nanopore structures, and the air pockets operate to resist absorbing water into the pore [22,32]. The absorption depth of the liquid droplet in the pore can be expressed under the assumption that the size of the single pore is much smaller than the size of the liquid droplet [19]:…”

“…Notably, many studies have examined the wetting behavior of highly-ordered nanopore structures using specifically proposed wetting models [19−24]. As we have shown in our previous study, the trapped air in the pores is a critical parameter to determine the wetting behavior of nanopore structures [22]. Applying the theory of minimum interfacial free energy and force balance mechanism, Yang et al developed a wetting model to investigate the contact angle of a droplet on aluminabased nanopore structures [23].…”