Crystalline structure and ferroelectric response of poly(vinylidene fluoride)/ organically modified silicate thin films prepared by heat controlled spin coating

Subramaniyan Ramasundaram, Sun Yoon, Kap Jin Kim, Jong Soon Lee, Cheolmin Park

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Ultra-thin films of poly(vinylidene fluoride) (PVDF) and its organically modified silicate (OMS) nanocomposites were prepared by heat-controlled spin coating and characterized using FTIRGIRAS, AFM, DC-EFM, and P-E measurements. Incorporation of OMS, Lucentite STN into the PVDF matrix favored the preferential formation of b-phase in nanoscale thin films, irrespective of preparation temperature. The PVDF-OMS nanocomposite films have a little higher degree of orientation of molecular chains along the ITO substrate surface than that of the neat PVDF film. This gave the PVDF-OMS nanocomposite higher remanent polarization and better contrast in a DC-EFM phase image. Unlike the thick PVDF-OMS nanocomposites films showing only α-crystalline phase after quenching and slow cooling from the melt, the nanoscale thin PVDF-OMS films showed a mixture of α- and γ-crystalline phases without any trace of α-crystalline phase.

Original languageEnglish
Pages (from-to)951-960
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume210
Issue number11
DOIs
Publication statusPublished - 2009 Jun 5

Fingerprint

Silicates
Spin coating
vinylidene
Ferroelectric materials
fluorides
coating
silicates
Crystalline materials
Thin films
heat
thin films
nanocomposites
Nanocomposite films
Nanocomposites
quenching (cooling)
direct current
Remanence
Ultrathin films
molecular chains
polyvinylidene fluoride

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

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abstract = "Ultra-thin films of poly(vinylidene fluoride) (PVDF) and its organically modified silicate (OMS) nanocomposites were prepared by heat-controlled spin coating and characterized using FTIRGIRAS, AFM, DC-EFM, and P-E measurements. Incorporation of OMS, Lucentite STN into the PVDF matrix favored the preferential formation of b-phase in nanoscale thin films, irrespective of preparation temperature. The PVDF-OMS nanocomposite films have a little higher degree of orientation of molecular chains along the ITO substrate surface than that of the neat PVDF film. This gave the PVDF-OMS nanocomposite higher remanent polarization and better contrast in a DC-EFM phase image. Unlike the thick PVDF-OMS nanocomposites films showing only α-crystalline phase after quenching and slow cooling from the melt, the nanoscale thin PVDF-OMS films showed a mixture of α- and γ-crystalline phases without any trace of α-crystalline phase.",
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Crystalline structure and ferroelectric response of poly(vinylidene fluoride)/ organically modified silicate thin films prepared by heat controlled spin coating. / Ramasundaram, Subramaniyan; Yoon, Sun; Kim, Kap Jin; Lee, Jong Soon; Park, Cheolmin.

In: Macromolecular Chemistry and Physics, Vol. 210, No. 11, 05.06.2009, p. 951-960.

Research output: Contribution to journalArticle

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