| Project/Area Number |
23K04847
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 35020:Polymer materials-related
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| Research Institution | Tohoku University |
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Principal Investigator |
朱 慧娥 東北大学, 工学研究科, 客員教授 (70754539)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2025: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2024: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Ionic liquid / Ferroelectric / Crystal orientation / Ferroelectric polymer / Physical pinning wall / Nanosheets / Relaxor ferroelectricity |
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| Outline of Research at the Start |
This research proposal will develop a tunable bottom-up construction of multilayers consisting of PVDF and pDDA for relaxor ferroelectrics, study physical crystal pinning effect of PVDF homopolymer nanocrystals surrounded by amorphous pDDA and approach a mechanistic understanding of RFE behaviors.
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| Outline of Annual Research Achievements |
Increase of β phase PVDF in films were achieved by two methods:
(1) Interfacial preparation of PVDF/pDDA alloys was successfully obtained. FT-IR spectra were used to confirm the crysatallization of PVDF with different ratio of PVDF/PDDA. It shows the decrease of the concentration of PVDF in the polymer monolayer alloys caused the reduction of PVDF crystallites.
(2) Rich β phase improved the device properties by large remanent polarization values. The effect of ionic liquids on the PVDF crystal orientation at the PVDF polymer were investigated.Optimization on ferroelectric crystal content and crystal orientation was confirmed with the addition of IL which also contributed to the vertical phase separation structures in the polymer films.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
According reasearch plan, preparation of polymer alloy monolayers with tunable ferroelectric polymer contents and realization of monolayer transfer to substrates and electrodes should be achieved by the 2023 fiscal year.
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| Strategy for Future Research Activity |
(1) Realization of arbitrarily changeable layer structure in the multilayered nanosheets with controllable physical wall thickness for ferroelectric domain (First half of FY2024)
(2) Crystallization analysis and crystal size characterization (Second half of FY2024)
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