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Interfacial-ReS<sub>2</sub> facilitated formation of highly ordered ferroelectric polymer nanowires

ORAL

Abstract

In this work, we report the fabrication and characterization of highly ordered ferroelectric polymer nanowires on an anisotropic van der Waals material, layered 1T'-phase ReS2. We deposited 2 - 20 nm poly(vinylidene-fluoride-trifluorethylene) (PVDF-TrFE) thin films on mechanically exfoliated ReS2 layers using the Langmuir-Blodgett technique. After thermal annealing, the PVDF-TrFE films recrystallize into highly ordered nanowire structures with radius of 27±4 nm. The nanowires are closely packed and well aligned along the direction perpendicular to the b-axis of ReS2. We then characterized the polarization of the nanowires using vertical and lateral piezo-response force microscopy (PFM), which shows a uniform distribution of domain structure, suggesting the molecular chains’ orientation is highly ordered within the nanowire. Switching the polarization of the nanowires can lead to the change of conductivity in underlying few-layer ReS2, with a switching on-off ratio of up to 105. Our study provides a novel approach to fabricating high-quality ferroelectric 2D heterostructures for field effect studies.

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Presenters

  • Kun Wang

    Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

Authors

  • Kun Wang

    Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Dawei Li

    Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Shuo Sun

    Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Stephen P Ducharme

    Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Xia Hong

    University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center of Materials and Nanoscience, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln