File:Gecko's secret power - Matteo Gabaglio.jpg
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editDescriptionGecko's secret power - Matteo Gabaglio.jpg |
English: The drawing represent a Gecko (Tarentola mauretanica Linnaeus, 1758). Its aim is to show the structure of the gecko's toe pads, which allows him to stick and walk even on smooth surfaces. Gecko's adhesive secret is based on the hierarchical fibrillar structure of its toes: toe pads are made of lamellae, in turn composed of setal arrays (satae), futher subdivided in spatulae. Setae and Spatulae adapt to the surface, thereby maximizing contact points. This fibrillar micro and nanostructure, made of β-keratin, forms Van der Waals forces (a type of molecular attraction force) with the surface, allowing the gecko to stick even to the smoothest surface. Partial charges on one atom can induce a dipole in a neighboring atom. Van der Waals forces are created by attractions between opposite partial charges (δ+, δ-) of neighboring induced dipoles.
To detach, the reptile hyperextends its digits and scrolls up each toe pad by peeling in a distal to proximal direction. This hyperextension works also as a dirt and particule cleaner. It has been calculated that a single foot could sustain ~ 100 N force, enough to keep a gecko attached to a glass from only one toe. |
Date | |
Source | http://blog.illustraciencia.cat/2015/04/geckos-secret-power-matteo-gabaglio.html |
Author | Matteo Gabaglio |
I·lustraciència by ACCC, as a collaboration with Amical Wikimedia, kindly provided this illustration liberated by its author.
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Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 09:30, 10 December 2015 |
Color space | Uncalibrated |
Date metadata was last modified | 10:30, 10 December 2015 |
Date and time of digitizing | 18:58, 29 April 2015 |
Unique ID of original document | uuid:5D20892493BFDB11914A8590D31508C8 |
IIM version | 40,589 |