Three-level hierarchal modeling of gecko toe adhesion

The underlying mechanisms of gecko adhesion have been investigated through modeling of the three-level hierarchical microstructures under gecko's toe [1]. At the bottom of hierarchy, we show that the peeling strength of a spatula pad for attachment can be 10 times larger than that for detachment. At the intermediate level of hierarchy, we show that the 10 times difference in the peeling strength of a spatula pad for attachment and detachment …