Back to Search
Start Over
Influence of structured sidewalls on the wetting states and superhydrophobic stability of surfaces with dual-scale roughness
- Source :
- Applied Surface Science. 382:111-120
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The superhydrophobicity of biological surfaces with dual-scale roughness has recently received considerable attention because of the unique wettability of such surfaces. Based on this, artificial micro/nano hierarchical structures with structured sidewalls and smooth sidewalls were designed and the influences of sidewall configurations (i.e., structured and smooth) on the wetting state of micro/nano hierarchical structures were systematically investigated based on thermodynamics and the principle of minimum free energy. Wetting transition and superhydrophobic stability were then analyzed for a droplet on dual-scale rough surfaces with structured and smooth sidewalls. Theoretical analysis results show that dual-scale rough surfaces with structured sidewalls have a larger “stable superhydrophobic region” than those with smooth sidewalls. The dual-scale rough surfaces with smooth sidewalls can enlarge the apparent contact angle (ACA) without improvement in the superhydrophobic stability. By contrast, dual-scale rough surfaces with structured sidewalls present an advantage over those with smooth sidewalls in terms of enlarging ACA and enhancing superhydrophobic stability. The proposed thermodynamic model is valid when compared with previous experimental data and numerical analysis results, which is helpful for designing and understanding the wetting states and superhydrophobic stability of surfaces with dual-scale roughness.
- Subjects :
- Materials science
Scale (ratio)
General Physics and Astronomy
Nanotechnology
02 engineering and technology
Surfaces and Interfaces
General Chemistry
Surface finish
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Stability (probability)
0104 chemical sciences
Surfaces, Coatings and Films
Condensed Matter::Soft Condensed Matter
Physics::Fluid Dynamics
Contact angle
Wetting transition
Nano
Wetting
0210 nano-technology
Minimum free energy
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 382
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........e9d071f72eca34a8e6bdb8208441c29d