Wettability conversion on ZnO nanowire arrays surface modified by oxygen plasma treatment and annealing

Hydroxyl radical and thermal annealing on amorphous InGaZnO4 films for DNA immobilizations

“…If the high surface OH coverage on an aIGZO film surface is related to defects on the film surface, the significant decrease in DNA immobilization observed at T a = 700 • C (compared with that at T a = 500 • C) may be explained by a structural change of the film sample. A similar annealing effect has been previously reported with respect to the wettability control on ZnO nanowire samples [32,33]. As discussed in Section 3.2, the surface OH coverage on an aIGZO film surface is derived from the electric surface potentials.…”

Wettability of porous two‐dimensional ZnO nanocrystal films

“…Recently, thin solid films of aligned ZnO nanorod arrays were reported and these ZnO films became superhydrophobic when properly processed (Feng et al, 2004;Meng et al, 2005;Pauporte and Rathousky, 2007;Fang and Kang, 2008;Chen et al, 2009;Sakai et al, 2009). However, there are few reports on the wettability of ZnO nanoplate films.…”

“…Though crystalline ZnO surface is hydrophilic in nature, these ordered porous ZnO nanocrystal films were rough on the scales of nanometer and micrometer and could be hydrophobic (Li et al, 2005;Meng et al, 2005;Fang and Kang, 2008;Patra et al, 2009). There are two established models on the water dewetting behaviour on porous films, that is, Wenzel model and Cassie model (Li et al, 2005;Patra et al, 2009).…”

“…However, wettability is an important parameter in industrial processes for ZnO nanocrystal films, such as cleaning, coating, painting, and adhesion. Many groups (Feng et al, 2004;Li et al, 2005;Meng et al, 2005;Pauporte and Rathousky, 2007;Fang and Kang, 2008;Xu and Cai, 2008;Chen et al, 2009;Patra et al, 2009;Shinde et al, 2005;Sakai et al, 2009) have reported various methods to produce highly hydrophobic ZnO films. Generally, there are two strategies to get this target.…”

Superhydrophobic surfaces using selected zinc oxide microrod growth on ink-jetted patterns

“…Other uses of ZnO by many techniques to alter surface hydrophobicity are well documented. These include microcontact printing [27], cathodic electrodeposition [28], solution-dipping template methods [29], natural zinc metal oxidation [30], metal-organic chemical vapor deposition (MOCVD) [31], chemical bath deposition [32], vapor-liquid-solid growth (VLS) [33][34][35], DC plasma processing [36] and hydrothermal growth processes [37,38]. In most cases, these efforts involve unitary (single roughness) surface morphologies followed by chemical modification to generate low energy superhydrophobic surfaces.…”