Fig. 8: Stretchability and water-stability test of PEDOT:DS film.

a Photograph of a stretched PEDOT film on a PDMS substrate (size: 30 mm × 25 mm; t = 0.5 mm) at 30% tensile strain. b Variation in the resistance of the PEDOT:DS film with increasing strain. c Variation in the sheet resistance of a PEDOT film on PET versus the number of days of immersion in water at room temperature. Variations in the resistance are 0.4 ± 0.6 (1 day), 1.4 ± 0.4 (2 days), 2.1 ± 1.1 (3 days), 3.4 ± 1.1 (20 days), 3.8 ± 0.5 (30 days), respectively.