StarTalk Radio Sticky Science: The Force Be With You with Laurie Winkless
Apr 1, 2022
Laurie Winkless, a physicist and author of "Sticky: The Science of Surfaces," joins the hosts for a playful dive into the world of surfaces. They discuss the fascinating Van der Waals forces and how gecko feet inspire innovative adhesion technologies, like gecko tape. The conversation takes a thrilling turn to Formula 1, connecting gecko mechanics to tire design. Winkless also highlights cutting-edge marine technology that enhances vessel efficiency and sustainability, all while blending humor with scientific exploration.
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Gecko Feet Structure
- Geckos have a hierarchical structure on their feet, including lamellae (skin flaps), setae (hairs), and split ends.
- These structures allow intimate contact with surfaces, even those that appear smooth.
How Geckos Stick
- Surfaces that appear smooth are actually rough at a microscopic level.
- Geckos utilize Van der Waals forces, allowing their feet to interact with the electrons of the surface they're climbing.
Gecko Strength
- A gecko weighing half a pound can theoretically hold 300 pounds.
- This theoretical strength is based on scaling up the force measured on a single gecko hair.
