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In page Polytetrafluoroethylene:
"The coefficient of friction of plastics is usually measured against polished steel.[10] PTFE's coefficient of friction is 0.05 to 0.10,[1] which is the third-lowest of any known solid material (aluminium magnesium boride (BAM) being the lowest, with a coefficient of friction of 0.02; diamond-like carbon being second-lowest at 0.05).[citation needed] PTFE's resistance to van der Waals forces means that it is the only known surface to which a gecko cannot stick.[11] In addition, PTFE can be used to prevent insects from climbing up surfaces painted with the material. For example, PTFE is used to prevent ants from climbing out of formicaria. There are surface treatments for PTFE that alter the surface to allow adhesion to other materials.
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