Fig. 6. SEM image of CP(-PVDF)₂ prepared from a 1 mg mL⁻¹ DMF solution by adding THF (addition rate was 4 mL h⁻¹). Final concentration 0.1 mg mL⁻¹ (DMF 10% v/v in the final solution). Scale bars are 10 μm (a) and 200 nm (b).