• 研究課題をさがす
  • 研究者をさがす
  • KAKENの使い方
  1. 課題ページに戻る

2018 年度 実績報告書

特殊構造ブロックコポリマーの合成および自己組織化挙動

研究課題

研究課題/領域番号 17J01195
研究機関北海道大学

研究代表者

Ree Brian J.  北海道大学, 大学院総合化学院, 特別研究員(DC1)

研究期間 (年度) 2017-04-26 – 2020-03-31
キーワードfunctional brush polymer / brush block copolymer / ferroelectric memory / oxygen-based memory
研究実績の概要

The second year continued the development of novel ferroelectric digital memory system and novel polymers with oxygen-based conjugated moieties.
The molecular characterization of four types of perfluorinated brush homopolymers via 1H NMR, IR, and SEC have confirmed successful synthesis. TGA analysis confirmed high degradation temperatures. DSC have confirmed brush packing behavior for one of the homopolymers and crystallization behavior for the other three. This unusual behavior is under careful investigation along with synchrotron X-ray scattering experiments. As thin film devices, all homopolymers exhibited ferroelectric property of different degrees. It’s suspected that the length of perfluorinated brush is causing this behavior.
Novel polymers with oxygen-based conjugated moieties have been confirmed successful synthesis via 1H NMR, IR, and SEC measurements. TGA/DSC measurements have revealed that the novel polymers possess high thermal stability, confirming they are good microelectronics materials. Synchrotron X-ray reflectivity and X-ray scattering analysis have confirmed their ability to form stable and smooth thin films. Evaluation of digital memory performance through semiconductor analyzer have confirmed the nanoscale polymer thin film devices exhibit nonvolatile write-once-read-many (WORM) memory or volatile dynamic random access memory (DRAM). This particular system is highly successful demonstrating oxygen’s ability to transport charges to induce digital memory behavior. The current research is being summarized into a manuscript for publication.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

The development of the well-defined polymers for ferroelectric memory system and oxygen-based memory system have been progressing well.
The synthesis of ferroelectric memory system will continue to the synthesis of topological block copolymers alongside the advanced characterization of prepared brush homopolymers via DSC, X-ray scattering, ferroelectric property measurements and digital memory measurements. Topological block copolymers, once fully synthesized, will follow with the basic molecular characterization as well as the measurement of ferroelectric property, digital memory performance, and nanostructure formation ability in nanoscale thin films.
The synthesis of the oxygen-based polymers for digital memory has been completed, as well as the basic characterization via 1H NMR, IR, and SEC. TGA/DSC measurements have confirmed high thermal stability of polymers. Synchrotron X-ray measurements have confirmed polymers’ ability to form stable and smooth thin films in nanoscale. Semiconductor analyzer measurements have confirmed high performance, energy efficient digital memory performance of these polymers. Potential resistive memory mechanisms and/or theories behind these polymers are under investigation as well as the preparation for manuscript for publication of the results.

今後の研究の推進方策

As stated in the research proposal, synthetic work and basic molecular characterization of the synthesized polymers will continue.
As for the ferroelectric memory system, the characterization of homopolymers will continue as well as synthesis of topological block copolymers. The synthesized block copolymers will be subject to basic characterization as well as synchrotron X-ray reflectivity (XR) and X-ray scattering (XS) techniques to measure the nanostructure formation. Thin films of block copolymers will be fabricated to evaluate their ferroelectric property and resistive memory performance.
The synthetic procedure and basic molecular characterization for the oxygen-based polymers have been completed. Further characterization involving TGA/DSC, XR, and XS techniques to have confirmed high thermal stability and good ability to form stable thin films. In addition, polymer thin film devices have been evaluated through semiconductor analyzer to confirm nonvolatile memory and volatile memory characteristics. This is a great result that demonstrates oxygen’s ability to transport charges and give rise to resistive digital memory characters. Results are being summarized into manuscript for publication.

  • 研究成果

    (8件)

すべて 2019 2018

すべて 雑誌論文 (3件) (うちオープンアクセス 2件) 学会発表 (5件) (うち国際学会 4件)

  • [雑誌論文] Nanoscale film morphology and property characteristics of dielectric polymers bearing monomeric and dimeric adamantane units2019

    • 著者名/発表者名
      Ree Brian J.、Kobayashi Shingo、Heo Kyuyoung、Lee Taek Joon、Satoh Toshifumi、Ishizone Takashi、Ree Moonhor
    • 雑誌名

      Polymer

      巻: 169 ページ: 225~233

    • DOI

      10.1016/j.polymer.2019.02.053

  • [雑誌論文] Micelle Structure Details and Stabilities of Cyclic Block Copolymer Amphiphile and Its Linear Analogues2019

    • 著者名/発表者名
      Ree Brian J.、Satoh Toshifumi、Yamamoto Takuya
    • 雑誌名

      Polymers

      巻: 11 ページ: 163~163

    • DOI

      10.3390/polym11010163

    • オープンアクセス
  • [雑誌論文] A Comparative Study of Dynamic Light and X-Ray Scatterings on Micelles of Topological Polymer Amphiphiles2018

    • 著者名/発表者名
      Ree Brian J.、Lee Jongchan、Satoh Yusuke、Kwon Kyungho、Isono Takuya、Satoh Toshifumi、Ree Moonhor
    • 雑誌名

      Polymers

      巻: 10 ページ: 1347~1347

    • DOI

      10.3390/polym10121347

    • オープンアクセス
  • [学会発表] Synthesis and Characterization of Semi-conducting Polymers Containing Oxygen Assisted Conjugation2019

    • 著者名/発表者名
      Brian J. Ree, Takuya Isono, Toshifumi Satoh
    • 学会等名
      The 53rd SPSJ Hokkaido Winter Meeting,
  • [学会発表] Synthesis and Characterization of Electrical Memory Properties of Polymers with Oxygen Assisted Conjugation2018

    • 著者名/発表者名
      Brian J. Ree, Takuya Isono, Toshifumi Satoh
    • 学会等名
      Japan-Korea Joint Symposium on Polymer Science 2018
    • 国際学会
  • [学会発表] Thin Film Morphologies and Properties of Rotaxane-Containing Polymers and Block Copolymers2018

    • 著者名/発表者名
      Brian J. Ree, Daisuke Aoki, Toshifumi Satoh, Toshikazu Takata, Moonhor Ree
    • 学会等名
      2018 Synchrotron Radiation in Polymer Science & Grazing Incidence Small Angle Scattering International Conference
    • 国際学会
  • [学会発表] Morphological Structures and Properties of Novel Polymers Bearing Monomeric and Dimeric Adamantane Units2018

    • 著者名/発表者名
      Brian J. Ree, Kyuyoung Heo, Taek Joon Lee, Toshifumi Satoh, Takashi Ishizone, Moonhor Ree
    • 学会等名
      2018 Synchrotron Radiation in Polymer Science & Grazing Incidence Small Angle Scattering International Conference
    • 国際学会
  • [学会発表] Quantitative X-ray Scattering Studies on Micellar Morphologies of Topological Amphiphilic Block Copolymers2018

    • 著者名/発表者名
      Brian J. Ree, Toshifumi Satoh, Takuya Yamamoto
    • 学会等名
      2018 Synchrotron Radiation in Polymer Science & Grazing Incidence Small Angle Scattering International Conference
    • 国際学会

URL: 

公開日: 2019-12-27  

サービス概要 検索マニュアル よくある質問 お知らせ 利用規程 科研費による研究の帰属

Powered by NII kakenhi