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Surface roughness assisted growth of vertically oriented ferroelectric SbSI nanorods
Varghese, Justin M.; O'Regan, Colm; Deepak, Nitin; Whatmore, Roger W.; Holmes, Justin D.
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.
Keyword(s): 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
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Science Foundation Ireland; Higher Education Authority
Citation(s): 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
Publisher(s): American Chemical Society (ACS)
File Format(s): application/pdf
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First Indexed: 2018-09-13 06:31:00 Last Updated: 2018-09-13 06:31:00