In contrast to pure STO, the near-surface SrO OSr stacking fault can be employed to control surface roughness by adjusting SrO and TiO2 surface rumpling, to stabilize SrO termination in an SrO-rich surrounding or to increase the band gap in the case of TiO2 termination.
23 However, all methods have tradeoffs in terms of material flexibility, microstructure control, surface roughness, site selectivity, and sample geometry.
Super water-repellent surfaces are generally introduced by controlling the surface chemistry and surface roughness, which are applied by means of complex time-consuming processes.
The release kinetics of gentamicin in their study was controlled by surface roughness and porosity.
In such microchannels, protein adsorption was controlled by the surface roughness and wettability showing null adsorption on superhydrophobic stripes and greatly enhanced adsorption on rough hydrophilic stripes.
It has been well known that super-hydrophobic surfaces can be fabricated by controlling roughness on hydrophobic materials [6, 7]; thus, both top-down [8 12] and bottom-up [13 16] methods have been applied to make the surfaces of hydrophobic materials rough in micro- and nanoscales to enhance their hydrophobicity.
Microfracture closure is primarily controlled by elastic deformation, with surface roughness controlling further closure.
The results showed that the water contact angle of the Ti alloy substrate was increased to 105.5° from 65° by Ar ion bombardment, the water contact angle of the DLC coating reached about 104.2° by Ti element doping, and the water contact of the F-doped DLC coating attained about 156.3° by controlling F content and surface roughness.
The following process parameters were examined: laser power, scanning speed, defocus (the distance between focal point and workpiece surface), temperature controlled by pyrometer, and surface roughness.
Control of surface roughness, pore size and shape as well as surface wettability in polymers and biopolymers is very important in material science, medicine, biotechnology and food science.
