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Raman scattering from single WS2 nanotubes in stretched PVDF electrospun fibers

Abstract

Inorganic WS2 nanotubes (INT-WS2) were embedded into sub-µm polyvinylidene fluoride-co-hexafluropropylene (PVDF-HFP) electrospun fibers. Here we report on the Raman scattering spectroscopy from single nanotube during stretching of individual nanocomposite fibers. Red shifts of up to ~4.7 cm-1 for A1g and E12g WS2 bands were found before reaching the “tearing point” of the fibers. Those shifts may correlate with ~2.8% of the WS2 nanotubes elongation. Moreover, absence of the A1g and E12g bands’ broadening, as well as the nonappearance of the E22g shear mode in the nanotubes Raman spectra, suggest the stretching of the nanotubes as whole (including inner layers). These results point to the excellent adhesion of the nanotubes’ surface to the polymer and to the effective load transfer from the polymer to the WS2 nanotube. In order to elucidate the nature of interaction between the polymer and the nanofiller we modeled the deformation of composite fibers using elastic lattice spring model (LSM). The results of the model are fully consistent with our interpretation.

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Publication details

The article was received on 11 Feb 2017, accepted on 14 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7CP00934H
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Raman scattering from single WS2 nanotubes in stretched PVDF electrospun fibers

    O. Grinberg, S. Deng, E. Zussman, T. Livneh and A. Zak, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP00934H

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