Compression of cross-linked poly(vinylidene fluoride- co -trifluoro ethylene) films for facile ferroelectric polarization

Yu Jin Shin, Richard Hahnkee Kim, Hee Joon Jung, Seok Ju Kang, Youn Jung Park, Insung Bae, Cheolmin Park

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this study, we demonstrated a facile route for enhancing the ferroelectric polarization of a chemically cross-linked poly(vinylidene fluoride-co-trifluoro ethylene) (PVDF-TrFE) film. Our method is based on thermally induced cross-linking of a PVDF-TrFE film with a 2,2,4-trimethyl-1,6- hexanediamine (THDA) agent under compression. The remanent polarization (P r) of a metal/ferroelectric/metal capacitor containing a cross-linked PVDF-TrFE film increased with pressure up to a certain value, whereas no change in the P r value was observed in the absence of THDA. A film cross-linked with 10 wt % THDA with respect to PVDF-TrFE under a pressure of 100 kPa exhibited a P r of approximately 5.61 μC/cm 2, which is 1.6 times higher than that in the absence of pressure. The enhanced ferroelectric polarization was attributed to highly ordered 20-nm-thick edge-on crystalline lamellae whose c-axes are aligned parallel to the substrate. The lamellae were effective for ferroelectric switching of the PVDF-TrFE when a cross-linked film was recrystallized under pressure. Furthermore, compression of a PVDF-TrFE film with a topographically prepatterned poly(dimethyl siloxane) mold gave rise to a chemically cross-linked micropattern in which edge-on crystalline lamellae were globally oriented over a very large area.

Original languageEnglish
Pages (from-to)4736-4743
Number of pages8
JournalACS Applied Materials and Interfaces
Volume3
Issue number12
DOIs
Publication statusPublished - 2011 Dec 28

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1,6-diaminohexane
Ferroelectric materials
Ethylene
Polarization
Compaction
Metals
Siloxanes
Crystalline materials
Remanence
polyvinylidene fluoride
ethylene
Capacitors
Substrates

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Shin, Yu Jin ; Kim, Richard Hahnkee ; Jung, Hee Joon ; Kang, Seok Ju ; Park, Youn Jung ; Bae, Insung ; Park, Cheolmin. / Compression of cross-linked poly(vinylidene fluoride- co -trifluoro ethylene) films for facile ferroelectric polarization. In: ACS Applied Materials and Interfaces. 2011 ; Vol. 3, No. 12. pp. 4736-4743.
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abstract = "In this study, we demonstrated a facile route for enhancing the ferroelectric polarization of a chemically cross-linked poly(vinylidene fluoride-co-trifluoro ethylene) (PVDF-TrFE) film. Our method is based on thermally induced cross-linking of a PVDF-TrFE film with a 2,2,4-trimethyl-1,6- hexanediamine (THDA) agent under compression. The remanent polarization (P r) of a metal/ferroelectric/metal capacitor containing a cross-linked PVDF-TrFE film increased with pressure up to a certain value, whereas no change in the P r value was observed in the absence of THDA. A film cross-linked with 10 wt {\%} THDA with respect to PVDF-TrFE under a pressure of 100 kPa exhibited a P r of approximately 5.61 μC/cm 2, which is 1.6 times higher than that in the absence of pressure. The enhanced ferroelectric polarization was attributed to highly ordered 20-nm-thick edge-on crystalline lamellae whose c-axes are aligned parallel to the substrate. The lamellae were effective for ferroelectric switching of the PVDF-TrFE when a cross-linked film was recrystallized under pressure. Furthermore, compression of a PVDF-TrFE film with a topographically prepatterned poly(dimethyl siloxane) mold gave rise to a chemically cross-linked micropattern in which edge-on crystalline lamellae were globally oriented over a very large area.",
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Compression of cross-linked poly(vinylidene fluoride- co -trifluoro ethylene) films for facile ferroelectric polarization. / Shin, Yu Jin; Kim, Richard Hahnkee; Jung, Hee Joon; Kang, Seok Ju; Park, Youn Jung; Bae, Insung; Park, Cheolmin.

In: ACS Applied Materials and Interfaces, Vol. 3, No. 12, 28.12.2011, p. 4736-4743.

Research output: Contribution to journalArticle

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T1 - Compression of cross-linked poly(vinylidene fluoride- co -trifluoro ethylene) films for facile ferroelectric polarization

AU - Shin, Yu Jin

AU - Kim, Richard Hahnkee

AU - Jung, Hee Joon

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AU - Bae, Insung

AU - Park, Cheolmin

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N2 - In this study, we demonstrated a facile route for enhancing the ferroelectric polarization of a chemically cross-linked poly(vinylidene fluoride-co-trifluoro ethylene) (PVDF-TrFE) film. Our method is based on thermally induced cross-linking of a PVDF-TrFE film with a 2,2,4-trimethyl-1,6- hexanediamine (THDA) agent under compression. The remanent polarization (P r) of a metal/ferroelectric/metal capacitor containing a cross-linked PVDF-TrFE film increased with pressure up to a certain value, whereas no change in the P r value was observed in the absence of THDA. A film cross-linked with 10 wt % THDA with respect to PVDF-TrFE under a pressure of 100 kPa exhibited a P r of approximately 5.61 μC/cm 2, which is 1.6 times higher than that in the absence of pressure. The enhanced ferroelectric polarization was attributed to highly ordered 20-nm-thick edge-on crystalline lamellae whose c-axes are aligned parallel to the substrate. The lamellae were effective for ferroelectric switching of the PVDF-TrFE when a cross-linked film was recrystallized under pressure. Furthermore, compression of a PVDF-TrFE film with a topographically prepatterned poly(dimethyl siloxane) mold gave rise to a chemically cross-linked micropattern in which edge-on crystalline lamellae were globally oriented over a very large area.

AB - In this study, we demonstrated a facile route for enhancing the ferroelectric polarization of a chemically cross-linked poly(vinylidene fluoride-co-trifluoro ethylene) (PVDF-TrFE) film. Our method is based on thermally induced cross-linking of a PVDF-TrFE film with a 2,2,4-trimethyl-1,6- hexanediamine (THDA) agent under compression. The remanent polarization (P r) of a metal/ferroelectric/metal capacitor containing a cross-linked PVDF-TrFE film increased with pressure up to a certain value, whereas no change in the P r value was observed in the absence of THDA. A film cross-linked with 10 wt % THDA with respect to PVDF-TrFE under a pressure of 100 kPa exhibited a P r of approximately 5.61 μC/cm 2, which is 1.6 times higher than that in the absence of pressure. The enhanced ferroelectric polarization was attributed to highly ordered 20-nm-thick edge-on crystalline lamellae whose c-axes are aligned parallel to the substrate. The lamellae were effective for ferroelectric switching of the PVDF-TrFE when a cross-linked film was recrystallized under pressure. Furthermore, compression of a PVDF-TrFE film with a topographically prepatterned poly(dimethyl siloxane) mold gave rise to a chemically cross-linked micropattern in which edge-on crystalline lamellae were globally oriented over a very large area.

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