Fig. 4.

Mechanical performance investigation and flexible and transparent device fabrication. a Influence of eMica nanosheet content on the tensile strength and Young’s modulus of these films. b Comparison of the tensile strength of 60 wt.% polymeric mica film, sheet mica, and other as-prepared nacre-like competitors with same thickness (~25 µm). c Comparison of strength and transmittance at 555 nm of the 60 wt.% polymeric mica film and other nanoclay-based biomimetic composite films^{27,33,38–41}. d Fracture morphology of the 60 wt.% polymeric mica film after tensile testing. Scale bar, 800 nm. e Proposed synergistic mechanical enhancement mechanism of the 60 wt.% polymeric mica film. f Retention of the tensile strength of 60 wt.% polymeric mica and other as-prepared nacre-like competitors after UV irradiation for 144 h. g Schematic illustration of the device with 60 wt.% polymeric mica film as its substrate. h Typical I–V curves of the device measured in the dark and upon light illumination (450 nm, 180 mW cm⁻², flat and bent). Inset shows a photograph of a bent device. i Time response spectrum of the device to pulsed light at V = 1 V. All the error bars represent the s.d. of at least five replicate measurements