Bottom-up Construction of Semi-Conductive/Ferroelectric Polymer Hybrid Nanofilms for Flexible Devices

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K17953
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Polymer/Textile materials
• Research Institution: Tohoku University
• Principal Investigator: ZHU HUIE 東北大学, 多元物質科学研究所, 助教 (70754539)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: Bottom-up method / Ferroelectric polymer / Semi-conductive polymer / Non-volatile memories / Spin valves / Langmuir-Blodgett / Polymer blends

Outline of Final Research Achievements

Bottom-up preparation of ferroelectric poly(vinylidene fluoride) (PVDF) was succeeded at nanometer-precision for developing memory devices including resistive nonvolatile memories and spin-valves, etc. First, ferroelectric PVDF/semiconductive polythiophene hybrid monolayers were successfully fabricated at varying blend ratios from the Langmuir-Blodgett method. The PVDF matrix in the hybrid nanosheets contains almost 100% ferroelectric phase. Ferroelectric non-volatile memories were realized owing to the ferroelectricity-manipulated resistive switching. On the other hand, the PVDF LB nanosheets were applied as insulator tunnel layer in spin valves of Co/PVDF/Fe3O4. It is noteworthy that the magnetoresistance (MR) effect was even observed at 300 K with a MR ratio exceeding 2.5%, which is achieved for the first time in such organic devices. Therefore, the ferroelectric PVDF hybrid nanosheets are promising candidates for various organic electronics with outstanding performance.

Free Research Field

高分子・繊維材料