title: Revisiting the fine structure of the triple line.
abstract: The fine structure of the triple line for water droplets deposited on porous polymer substrates was investigated. Substrates were obtained with the breath-figures self-assembly. Water droplets demonstrated the pronounced Cassie-Baxter wetting regime. The triple line was imaged with environmental scanning electron microscopy. The roughness of a triple line was characterized with its averaged root-mean-square (rms) width w(L), and its scaling experimental dependence upon the length L of the triple line w(L) is proportional to L(ζ) was analyzed. The values of exponents in the range of 0.60-063 were established. The deduced values of ζ evidence the local nature of the triple-line elasticity and support the idea that the elastic potential of the triple line includes only even powers of the displacement.
authors.affiliation: Department of Physics, and ‡Department of Chemical Engineering and Biotechnology, Ariel University , Post Office Box 3, Ariel 40700, Israel.
authors.forename: E
authors.initials: E
authors.lastname: Bormashenko
authors.forename: A
authors.initials: A
authors.lastname: Musin
authors.forename: G
authors.initials: G
authors.lastname: Whyman
authors.forename: Z
authors.initials: Z
authors.lastname: Barkay
authors.forename: M
authors.initials: M
authors.lastname: Zinigrad
mesh_terms: D005583:Fourier Analysis; D009038:Motion; D011076:Polycarboxylate Cement / Q000737:chemistry; D016062:Porosity; D012212:Rheology; D014867:Water / Q000737:chemistry*; D017155:Wettability
chemical_list: D011076:Polycarboxylate Cement; D014867:Water; C005506:polycarbonate