Effect of poling on localized mechanical properties of a single NW: (a) contact mode topography image of a NW before poling; (b) (i) topography and (ii) PFM of the same NW following up- (green arrow) and down-poling (pink arrows); (c) corresponding QNM mode (i) topography and (ii) modulus images from the NW; (d) elastic modulus channel scanning the up-poled region; (e) line scan obtained from poled area (dashed box) in (d), showing the diminished modulus of the up-poled region. The red and green circles indicate the same features captured in different scans/channels, verifying the spatial location of the scans.