Observation of optimal gecko's adhesion on nanorough surfaces

Nicola M. Pugno, Emiliano Lepore
2008 Biosystems (Amsterdam. Print)  
In this letter we report experimental observations on the times of adhesion of living Tokay geckos (Gekko geckos) on polymethylmethacrylate (PMMA) inverted surfaces. Two different geckos (male and female) and three surfaces with different root mean square (RMS) roughness (RMS = 42, 618 and 931 nm) have been considered, for a total of 72 observations. The measured data are proved to be statistically significant, following the Weibull Statistics with coefficients of correlation between 0.781 and
more » ... .955. The unexpected result is the observation of a maximal gecko adhesion on the surface with intermediate roughness of RMS = 618 nm, that we note has waviness comparable to the seta size.
doi:10.1016/j.biosystems.2008.06.009 pmid:18718501 fatcat:orjo7glarzbhloen2adzbwtz3m