Adhesive force of a single gecko foot-hair

By Kellar Autumn, Yiching A. Liang, S. Hsieh, W. Zesch, W. P. Chan, Thomas W. Kenny, Ronald S. Fearing, Robert J. Full. Nature, 2000

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Directional adhesion for climbing: theoretical and practical considerations (2007, methodology): “The first tests performed on the DPS were similar to the tests performed on single gecko setae and arrays of setae [4, 6] specifically looking at the normal and tangential characteristics of the DPS.”
Frictional adhesion: a new angle on gecko attachment (2006, methodology): “Critical angle of detachment in isolated setae We used data collected earlier (Autumn et al., 2000) for the detachment angle ( *) of single setae.”
WHEN LESS IS MORE: EXPERIMENTAL EVIDENCE FOR TENACITY ENHANCEMENT BY DIVISION OF CONTACT AREA (2004, background): “In contrast to smooth systems, some hairy systems seem to operate because of dry adhesion and do not require supplementary fluids in the contact area [ 5 , 6 ].”