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Multilayer liquid spreading on superhydrophilic nanostructured surfaces
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10.1063/1.3127461
/content/aip/journal/apl/94/19/10.1063/1.3127461
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/19/10.1063/1.3127461
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM of a surface with nanostructured arrays of pillars with diameters of 500 nm and spacings of 800 nm. The scallops have dimensions of approximately 100 nm. (b) Visualization of multilayer spreading on the corresponding geometry in (a). Liquid spreads from left to right where the dark area is dry. The differences in intensity indicate variations in liquid film thickness.

Image of FIG. 2.
FIG. 2.

(a) Schematic showing the idealization of the scalloped pillars from the DRIE process into tiered steps. (b) The change in normalized surface energy as a function of normalized liquid height on a two-tiered pillar geometry where and . is the energy change when the liquid wets the entire pillar and is the height of the liquid interface. (c) The change in normalized surface energy as a function of normalized liquid height on a two-tiered pillar geometry where and . (d) Schematic showing a liquid droplet deposited onto the surface and the two possible spreading configurations determined by the parameter when a volume of is supplied from the droplet.

Image of FIG. 3.
FIG. 3.

(a) Schematic showing pillars with a single notch and associated dimensions. Representative SEMs are shown for the cases when , , , and . (b) The parameter space that determines the presence of a single or dual layers for the case . Experiments with pillars of diameters ranging from 2 to and spacings of 2 to are plotted. (c) Parameter space that determines the presence of single or dual layers for the case . The range of diameters and the spacings are the same as in (b).

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/content/aip/journal/apl/94/19/10.1063/1.3127461
2009-05-13
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multilayer liquid spreading on superhydrophilic nanostructured surfaces
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/19/10.1063/1.3127461
10.1063/1.3127461
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