Surface roughness assisted growth of vertically oriented ferroelectric SbSI nanorods

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Varghese, Justin M.
O'Regan, Colm
Deepak, Nitin
Whatmore, Roger W.
Holmes, Justin D.
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American Chemical Society (ACS)
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We report the catalyst-free synthesis of arrays of c-axis oriented antimony sulfoiodide nanorods on anodic aluminum oxide (AAO) substrates by vapor phase deposition. The surface roughness of the AAO substrates played a decisive role in the orientation control of the SbSI nanorods produced. The as-grown SbSI nanorods were single-crystalline and ⟨001⟩ oriented, as revealed from the X-ray diffraction and transmission electron microscopy analysis. Switching spectroscopy-piezoresponse force microscopy experiments demonstrated, for the first time, the presence of switchable ferroelectricity and piezoelectricity in individual SbSI nanorods. Ferroelectric switching in the SbSI nanorods was found to occur via a 180° domain reversal, because of the preferred orientation of the nanorods along their polar c-axis.
Nano , SbSI , Roughness , Piezoelectric , Ferroelectric , PFM , Surface roughness , Aluminum coatings , Anodic oxidation , Crystallography , Ferroelectric materials , Ferroelectricity , Nanorods , Piezoelectricity , Scanning probe microscopy , Transmission electron microscopy , X ray diffraction
Varghese, J., O’Regan, C., Deepak, N., Whatmore, R. W. and Holmes, J. D. (2012) 'Surface Roughness Assisted Growth of Vertically Oriented Ferroelectric SbSI Nanorods', Chemistry of Materials, 24(16), pp. 3279-3284. doi: 10.1021/cm301928w
© 2012 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see