High-resolution studies of domain switching behavior in nanostructured ferroelectric polymers

Pankaj Sharma, Timothy J. Reece, Stephen Ducharme, Alexei Gruverman

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

We have demonstrated an effective electrical control of polarization in the individual crystalline nanomesas of the ferroelectric polymer, poly(vinylidene fluoride)-trifluoroethylene (PVDF-TrFE) and its relation to the polymer structure. The mechanism of polarization reversal has been investigated via sub-10 nm real space imaging of domain pattern evolution under an applied electric field. The domain switching behavior revealed in PVDF-TrFE nanomesas is drastically different from that observed in inorganic solid-state crystalline ferroelectrics. The nanoscale features of the switching process include remote domain nucleation and spatially nonuniform wall velocity. Local switching spectroscopy and domain dynamics studies relate the observed switching features to a random-bond type disorder associated with defects in conformation and molecular packing.

Original languageEnglish (US)
Pages (from-to)1970-1975
Number of pages6
JournalNano Letters
Volume11
Issue number5
DOIs
StatePublished - May 11 2011

Keywords

  • Ferroelectric polymer
  • disorder
  • domain switching
  • piezoresponse force microscopy

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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