Figure 4
From: Unveiling the piezoelectric nature of polar α-phase P(VDF-TrFE) at quasi-two-dimensional limit
Time-dependent domain piezoelectric behaviours of the ultrathin polar α-phase P(VDF-TrFE) films. (a–d) The out-of-plane PFM amplitude images at different time periods. (e–h) The out-of-plane PFM phase images at different time periods. All PFM images were acquired over the pre-poled areas. The white dotted lines in (a–h) form the boundary between the two adjacent polarized areas with scale bar of 1 μm. (i) The phase contrasts and relative amplitudes between two different electrical polarization orientations as a function of the delay times. Blue and red dotted lines are fitting curves to visualize the changing trends.
