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 language | English |
|---|---|
| Pages (from-to) | 4736-4743 |
| Number of pages | 8 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 3 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2011 Dec 28 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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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 journal › Article
TY - JOUR
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
AU - Kang, Seok Ju
AU - Park, Youn Jung
AU - Bae, Insung
AU - Park, Cheolmin
PY - 2011/12/28
Y1 - 2011/12/28
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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U2 - 10.1021/am201202w
DO - 10.1021/am201202w
M3 - Article
C2 - 22070130
AN - SCOPUS:84862798408
VL - 3
SP - 4736
EP - 4743
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 12
ER -