Effective boundary slip and wetting characteristics of water on substrates with effects of surface morphology
| Autor: | Chyi-Yeou Soong, Tsu-Hsu Yen |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Nanostructure
Materials science Condensed matter physics Biophysics Nanotechnology 02 engineering and technology Slip (materials science) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Contact angle Molecular dynamics 0103 physical sciences Surface roughness Graphite Wetting Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Molecular Biology Nanoscopic scale |
| Zdroj: | Molecular Physics. 114:797-809 |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268976.2015.1119899 |
| Popis: | In the present study, molecular dynamics (MD) simulation was used to investigate the relationship between wetting behaviour and slip length on patterned substrates. We adopted two solid surfaces of Si(100) and graphite due to similarities in their intrinsic contact angle. Contact angle and apparent slip length were obtained using discrete simulations with the same thermodynamic states. In the present study, a number of questions regarding surface roughness and the problem of contact angle (θ) and slip length (Ls) are discussed. These questions include the relationship between θ and surface roughness, the characteristics used to describe the difference between static and dynamic fluid fields and the reason for a lack of multilayer sticking observed in the current cases. Our results indicate that the quasi-universal θ − Ls equation proposed by Hung et al. (2008) is applicable to cases involving a Cassie-like nanoscale roughened surface. In contrast, in cases with a Wenzel-like nanostructure, the no-... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|