encountered during the amorphous to orthorhombic (-o) transformation and is ferroelectric in
nature. Thus far it has only been stabilized in a substrate-supported few layered ultrathin film
form. Herein we show that the surface-induced strain field intrinsically present in nano-
systems can self-stabilize this phase and the hexagonal to orthorhombic phase constitution
ratio depends on the shape of the nanomaterial. Thus, nanoparticles (nanofibres) strain …