So how do your print your own TENG? First, you load up an electrically conductive PLA filament and lay down a base into which a series of channels has been designed. At around the half-way point ...

In addition to galvanization (plating with zinc or steel) you can see copper plating of a nail ... it would be interesting to try plating conductive filament without using the paint.

This project used the same copper-lined polymer filament as the fully 3D-printable ... devices can be made using extruded ...