Influence of surface roughness on gecko adhesion
In this study we show the influence of surface roughness on gecko adhesion on both the nano- and macroscales. We present experimental data for the force necessary to pull off single spatulae from hard rough substrates and also detail observations on living geckos clinging to various surfaces. Both experiments consistently show that the effective adhesion shows a minimum for a root mean square roughness ranging from 100 to 300 nm.
Journal: Acta Biomaterialia - Volume 3, Issue 4, July 2007, Pages 607–610