How Tokay gecko Inspired Dry Adhesives

Gekko gecko · Animal · Southeast Asian rainforests and rocky outcrops

What if the solution to reversible dry adhesion had already been perfected — by a tokay gecko over 50 million years of evolution?

The Natural Innovation

Millions of microscopic hair-like structures called setae on the gecko’s toe pads create van der Waals forces — weak molecular attractions — that collectively produce enough adhesive force to support the animal’s full body weight on glass, yet release instantly with a simple toe angle change.

The tokay gecko lives in Southeast Asian rainforests and rocky outcrops.

In the language of biomimicry, this falls under the Attach › Attach temporarily category.

The Design Principle

Hierarchical micro- and nano-scale fibrillar structures create intermolecular adhesion that is strong in shear but releases cleanly when the angle changes — no chemistry needed.

Human Applications

Dry adhesive tapes and pads that stick to almost any surface without glue, residue, or suction. Useful for robotics grippers, medical wound closure, and reusable fasteners.

Real-world implementations include: Geckskin (UMass Amherst), Draper Laboratory gecko-inspired climbing robot, NASA spacecraft docking adhesives.

Source: AskNature.org