Publications in Scientific Journals:
J. Varghese, S. Barth, L. Keeney, R. Whatmore, J. Holmes:
"Nanoscale Ferroelectric and Piezoelectric Properties of Sb2S3 Nanowire Arrays";
Nano Letters,
12
(2012),
2;
868
- 872.
English abstract:
We report the first observation of piezoelectricity and ferroelectricity in individual Sb2S3 nanowires embedded in anodic alumina templates. Switching spectroscopy-piezoresponse force microscopy (SS-PFM) measurements demonstrate that individual, c-axis-oriented Sb2S3 nanowires exhibit ferroelectric as well as piezoelectric switching behavior. Sb2S3 nanowires with nominal diameters of 200 and 100 nm showed d33(eff) values around 2 pm V-1, while the piezo coefficient obtained for 50 nm diameter nanowires was relatively low at around 0.8 pm V-1. A spontaneous polarization (Ps) of approximately 1.8 μC cm-2 was observed in the 200 and 100 nm Sb2S3 nanowires, which is a 100% enhancement when compared to bulk Sb2S3 and is probably due to the defect-free, single-crystalline nature of the nanowires synthesized. The 180° ferroelectric monodomains observed in Sb2S3 nanowires were due to uniform polarization alignment along the polar c-axis.
Keywords:
Nanowires; Sb2S3; template; piezoelectric; ferroelectric; PFM
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1021/nl2039106
Created from the Publication Database of the Vienna University of Technology.