Vapour growth of SbSI on a seed

A single-source precursor route to antimony sulpho-iodide

“…It exhibits the highest Curie temperature of any of the 15-16-17 class of ternary materials, has a peak dielectric constant of 5 Â 10 4 along the polar axis [4,5], a pyroelectric current of 1.3 nA at the Curie temperature [5] and the highest known refractive index (4.5) of any material [6]. Furthermore, it is known that Sb(S)I benefits from deposition on a Sb 2 S 3 sub-layer (a weakly polar semi-conducting ferroelectric material in its own right), as this helps orient the former along its c axis [7].…”

Surface Roughness Assisted Growth of Vertically Oriented Ferroelectric SbSI Nanorods

“…Polar surfaces are generally stabilized by surface reconstruction or faceting . During SbSI formation, after an initial period of nucleation, SbSI tends to form 1D structures because the nanorod formation can maximize the areas of the {110}, {010}, and {100} facets, which have a lower free energy compared to {002} facets. , Along the [001] direction, the growth of SbSI can take place without the formation of a 2D nuclei because its orthorhombic structure (Pna2 1 ) possess a 2 1 screw axis in this direction …”

“…34 During SbSI formation, after an initial period of nucleation, SbSI tends to form 1D structures because the nanorod formation can maximize the areas of the {110}, {010}, and {100} facets, which have a lower free energy compared to {002} facets. 35,36 Along the [001] direction, the growth of SbSI can take place without the formation of a 2D nuclei because its orthorhombic structure (Pna2 1 ) possess a 2 1 screw axis in this direction. 37 The nanoscale piezoelectric and ferroelectric properties of SbSI nanorods grown at 250 °C on AAO/Ti/Si substrates were studied, for the first time, using piezoresponse force microscopy (PFM) in contact mode.…”