Fig. 5: Imaging and performance of a nanofibrous SiOC spring.

A spring made from a single printed and pyrolyzed filament was A compressed to 50%, B brought back to its origin, and C strained to 50%. D Hysteresis graph showing the change in oscillation force required to strain a spring to 10% of its original length over the course of 1 h at 3 Hz frequency. Scale bars in (A–C) represent 1 mm.