Extended Data Fig. 2: Electrical conduction of the PVDF/TiO2 nanocomposites.
From: Electro-thermal actuation in percolative ferroelectric polymer nanocomposites

a, Conduction current density of the PVDF/TiO2 nanocomposites under 10 MV m−1 electric field. b, TiO2 content-dependent conductivity of the PVDF/TiO2 nanocomposites. The red line is the fitting of the conductivity by the percolation model, which gives a percolation threshold (fc) of about 15 vol% as indicated by the blue line.