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      Spontaneous high piezoelectricity in poly ( vinylidene fluoride ) nanoribbons produced by iterative thermal size reduction technique

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      Author(s)
      Kanik, M.
      Aktas, O.
      Sen, H. S.
      Durgun, Engin
      Bayındır, Mehmet
      Date
      2014-08-18
      Source Title
      ACS Nano
      Print ISSN
      1936-0851
      Publisher
      American Chemical Society
      Volume
      8
      Issue
      9
      Pages
      9311 - 9323
      Language
      English
      Type
      Article
      Item Usage Stats
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      464
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      Abstract
      We produced kilometer-long, endlessly parallel, spontaneously piezoelectric and thermally stable poly(vinylidene fluoride) (PVDF) micro- and nanoribbons using iterative size reduction technique based on thermal fiber drawing. Because of high stress and temperature used in thermal drawing process, we obtained spontaneously polar gamma phase PVDF micro- and nanoribbons without electrical poling process. On the basis of X-ray diffraction (XRD) analysis, we observed that PVDF micro- and nanoribbons are thermally stable and conserve the polar gamma phase even after being exposed to heat treatment above the melting point of PVDF. Phase transition mechanism is investigated and explained using ab initio calculations. We measured an average effective piezoelectric constant as -58.5 pm/V from a single PVDF nanoribbon using a piezo evaluation system along with an atomic force microscope. PVDF nanoribbons are promising structures for constructing devices such as highly efficient energy generators, large area pressure sensors, artificial muscle and skin, due to the unique geometry and extended lengths, high polar phase content, high thermal stability and high piezoelectric coefficient. We demonstrated two proof of principle devices for energy harvesting and sensing applications with a 60 V open circuit peak voltage and 10 mu A peak short-circuit current output.
      Keywords
      Piezoelectric Polymer
      Nanoribbon
      Fiber Drawing
      Pvdf
      Energy Harvesting
      Ab Initio Calculation
      Permalink
      http://hdl.handle.net/11693/12653
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/nn503269b
      Collections
      • Department of Physics 2550
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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