Biomimetic systems that are composed of rigid polymers or filaments and crosslinking molecules can be used to assemble filament networks and bundles. The bundles represent 'nanoropes' and exhibit material properties that are primarily determined by the number of plaited filaments. Scientists at the Max Planck Institute of Colloids and Interfaces in Potsdam, Germany have now shown that this assembly of filaments into bundles is prevented by the thermal motion of the filaments, unless the crosslinker concentration exceeds a certain threshold value.
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