Fig 8
From: Graphene-Based Flexible and Transparent Tunable Capacitors
a The bias-field dependence of the dielectric properties of BMN films at 550–800 °C. b The tunability and loss tangent of BMN film grown on graphene and Au at 750 °C. c The leakage current density versus electrical field for the BMN films grown on graphene and Au substrate. d Measured dielectric constant versus bias-field at the flat and bending conditions with curvature radii from 30 to 3 mm. The top left inset presents the homemade mechanical device for the bending test