Spiders' webs are not only sticky but are so electrically conductive that the silk threads spring out to trap their quarry.

These holes and extra electrons can move along the molecule to make it electrically conductive.

Its creators say the gooey, electrically conductive material can stretch more than 3,400 per cent and quickly return to its original form.

Depending on the density, carbon aerogels may be electrically conductive, making composite aerogel paper useful for electrodes in capacitors or deionization electrodes.

Silver-based thermal grease can also be either slightly electrically conductive or capacitive; if some flows onto the circuits it can cause malfunctioning and damage.