Abstract:
:Receding angles have been shown to have great significance when designing a superhydrophobic surface for applications involving self-cleaning. Although apparent receding angles under dynamic conditions have been well studied, the microscopic receding contact line dynamics are not well understood. Therefore, experiments were performed to measure these dynamics on textured square pillar and irregular superhydrophobic surfaces at micron length scales and at micro-second temporal scales. Results revealed a consistent "slide-snap" motion of the microscopic receding line as compared to the "stick-slip" dynamics reported in previous studies. Interface angles between 40-60° were measured for the pre-snap receding lines on all pillar surfaces. Similar "slide-snap" dynamics were also observed on an irregular nanocomposite surface. However, the sharper features of the surface asperities resulted in a higher pre-snap receding line interface angle (~90°).
journal_name
Sci Repjournal_title
Scientific reportsauthors
Yeong YH,Milionis A,Loth E,Bayer ISdoi
10.1038/srep08384subject
Has Abstractpub_date
2015-02-11 00:00:00pages
8384issn
2045-2322pii
srep08384journal_volume
5pub_type
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