Quantum mechanics in biological systems (II): Gecko´s adhesion
The gecko, a climber´s hero, a lizard able to get a grip even face down on the smoothest ceiling or on the most vertical slippery surfaces. That, the adherence is one of the most striking features in most of the species in the family Gekkonidae. In Spain they are also known as “lagartijas” or “salamanquesas”. They are a good example beyond the trivial quantum effects, showing here quantum mechanics directly playing in the biological realm. Hence, entering the game of natural selection and evolution. The Gecko´s adhesion and the mechanism of their fascinating ability to hold its own weight with just a toe, like nailed to the most polished glass, has been matter of discussion during centuries. Many were the hypothesis for the amazing adherence system of this climber: suction, electrostatic attraction, micro-interlocking, and sticky secretions. Only two non excluding mechanisms are supported by evidence nowadays: capillary adhesion and intermolecular van der Waals attraction 1 Being at least the last one a direct quantum effect essential to get working such particular biological system.
The gecko, a climber´s hero, a lizard able to get a grip even face down on the smoothest ceiling or on the most vertical slippery surfaces. That, the adherence is one of the most striking features in most of the species in the family Gekkonidae. In Spain they are also known as “lagartijas” or “salamanquesas”. They are a good example beyond the trivial quantum effects, showing here quantum mechanics directly playing in the biological realm. Hence, entering the game of natural selection and evolution. The Gecko´s adhesion and the mechanism of their fascinating ability to hold its own weight with just a toe, like nailed to the most polished glass, has been matter of discussion during centuries. Many were the hypothesis for the amazing adherence system of this climber: suction, electrostatic attraction, micro-interlocking, and sticky secretions. Only two non excluding mechanisms are supported by evidence nowadays: capillary adhesion and intermolecular van der Waals attraction 1 Being at least the last one a direct quantum effect essential to get working such particular biological system.
