Supplementary Figure 6: The preparation of a spring by a thermo-hydro setting of an HHF.
From: Preparation of biomimetic hierarchically helical fiber actuators from carbon nanotubes
(a) Spirally wrapping an HHF on a glass rod. Scale bar, 5 mm. (b) The glass rod being transferred into a quartz boat at the middle of a furnace tube. Scale bar, 3 cm. (c) The HHF being heated at 300 oC for 1 h in the furnace at argon atmosphere (it is heated to 300 oC in 15 min). Scale bar, 10 cm.
