Ultrahydrophobic Surfaces. Effects of Topography Length Scales on Wettability

By Didem Öner, T. J. McCarthy. 2000

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Micro- and nanoscale characterization of hydrophobic and hydrophilic leaf surfaces (2006, background): “…surfaces have been fabricated directly by incorporating high roughness to the surface, and high contact angles have been reported for surfaces with micrometre- and nanometre-scale roughness (Hozumi and Takai 1998, Coulson et al 2000, Miwa et al 2000, Oner and McCarthy 2000, Lau et al 2003).”
Wetting and Roughness (2008, background): “However, Gao & McCarthy (51) approached, and perhaps reached, this limit (within the uncertainty of the measurements) by using nonwoven assemblies of nanofibers (Figure 7b) on which both the advancing and receding angles were 180◦.”
Natural and biomimetic artificial surfaces for superhydrophobicity, self-cleaning, low adhesion, and drag reduction (2011, methodology): “These criteria were tested on selected experiments from the literature [37,167,204,87].”
Recent developments in superhydrophobic surfaces and their relevance to marine fouling: a review (2006, background): “(b) Optical micrograph of a contact line measured on a substratum covered with honeycomb-like barriers (reproduced with permission from Oner & McCarthy, 2000 ).”