Microscopy from Scientific Research

3D-PFM image constructed by superimposing three PFM phase images in FigureS1b(Supporting Information). The directions of the IP polarizations are indicated by the arrows of the same colors; the green, light green, red, and pink arrows represent the polarization directions of IP[111]pc, IP[111]pc, IP[111]pc, and IP[111]pc, respectively. The black areas correspond the OOP polarization.

DOI