Localized electromechanical interactions in ferroelectric P(VDF-TrFE) nanowires investigated by scanning probe microscopy

Yonatan Calahorra; Richard A. Whiter; Qingshen Jing; Vijay Narayan; Sohini Kar-Narayan

doi:10.1063/1.4967752

Localized electromechanical interactions in ferroelectric P(VDF-TrFE) nanowires investigated by scanning probe microscopy

Materials Science 2019-10-03 v1 Mesoscale and Nanoscale Physics

Authors: Yonatan Calahorra , Richard A. Whiter , Qingshen Jing , Vijay Narayan , Sohini Kar-Narayan

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Abstract

We investigate the electromechanical interactions in individual P(VDF-TrFE) nanowires in response to localized electrical poling via a conducting atomic force microscope tip. Spatially resolved measurements of piezoelectric coefficients and elastic moduli before and after poling reveal a striking dependence on the polarity of the poling field, notably absent in thin films of the same composition. These observations are attributed to the unclamped nature of the nanowires and the inherent asymmetry in their chemical and electrical interactions with the tip and underlying substrate. Our findings provide insights into the mechanism of poling/switching in polymer nanowires critical to ferroelectric device performance.

Keywords

ferroelectric nanowires P(VDF-TrFE) electromechanical interactions scanning probe microscopy piezoelectric coefficients localized poling

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@article{arxiv.1610.07452,
  title  = {Localized electromechanical interactions in ferroelectric P(VDF-TrFE) nanowires investigated by scanning probe microscopy},
  author = {Yonatan Calahorra and Richard A. Whiter and Qingshen Jing and Vijay Narayan and Sohini Kar-Narayan},
  journal= {arXiv preprint arXiv:1610.07452},
  year   = {2019}
}

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19 pages, 5 figures

Localized electromechanical interactions in ferroelectric P(VDF-TrFE) nanowires investigated by scanning probe microscopy

Abstract

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