Fig. 1.

a Schematic for printing fabrication process of freestanding SWCNT film. b In-plane SEM image of the SWCNTs, showing the aligned SWCNTs in print (red arrow) direction. c Side-view SEM image of the SWCNT film, showing a typical thickness of 8 µm. d Photograph of a large-area (10 × 20 cm²) freestanding SWCNT film held by hands. e Demonstration of a meter-long freestanding SWCNT film. f Printed letters of SWCNTs on PET. g Origami boat made from SWCNT film floating on water (inset shows the water contact angle of 125° for the film)