Oaki, Yuya

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Chemistry （Yagami）

Position

Professor

Related Websites
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Academic Degrees 【 Display / hide 】

  • 博士（工学）, Keio University, Coursework, 2006.03

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Papers 【 Display / hide 】

  • 結晶を活用した高分子の形の制御

    OAKI Yuya

    高分子 66   221 - 222 2017.05

    Accepted

  • Visualization and Quantitative Detection of Friction Force by Self-Organized Organic Layered Composites

    H.Terada, H.Imai, Y.Oaki

    Advanced Materials （Advanced Materials)  30 （ 27 ）  2018

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  09359648

    　View Summary

    Visualization and quantitative detection of external stimuli are significant challenges in materials science. Quantitative detection of friction force, a mechanical stress, is not easily achieved using conventional stimuli-responsive materials. Here, the quantitative detection of friction force is reported, such as the strength and accumulated ammount, from the visible color of organic layered composites consisting of polydiacetylene (PDA) and organic amines without an excitation light source. The composites of the layered diacetylene monomer crystal and interlayer organic amine are synthesized through self-organization from the precursor solution. After topochemical polymerization, the layered composites based on PDA show tunable temperature-responsive and mechanoresponsive color-change properties depending on the types of interlayer amines. The layered composites are homogeneously coated on a filter paper. The change in color of the paper is quantitatively used to visualize the strength and accumulated amount of the applied friction force. Furthermore, writing pressure is measured by friction force using the paper device.

  • Emergence of temperature-dependent and reversible color-change properties by stabilization of layeredpolydiacetylene through intercalation

    Y. Oaki, Y. Ishijima, H. Imai

    Polymer Journal （Polymer Journal)  50 （ 4 ） 244 - 247 2018.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  00323896

    　View Summary

    The stimuli-responsive color-changing properties of functional polymers are applied to the development of sensing and imaging devices. Tuning the stimuli responsivity is required for a wide range of applications. Polydiacetylene (PDA) derivatives show color changes with the application of external stimuli, such as heat and mechanical stress. Our group has focused on the layered crystal structure of PDA and its intercalation chemistry. The original layered PDA shows an irreversible color transition from blue to red upon heating to the threshold temperature. Here, we found that alkyldiamine-intercalated PDA possessed different color-changing properties, such as a higher color transition temperature and a temperature-dependent and reversible color change, than the original PDA. As the alkyl-chain length increased, the color-changing behavior gradually converted from the irreversible color transition type to the reversible temperature-dependent one. Since the intercalated diamine had a stabilizing effect on the layered structure, the stimuli responsivity varied according to the type of diamine. The results suggest that the stimuli-responsive color-changing properties of layered PDA can be finely and systematically tuned by the intercalation of organic guests.

  • Few-layered titanate nanosheets with large lateral size and surface functionalization: Potentials for controlled exfoliation of inorganic-organic layered composite

    G. Nakada、H. Imai, Y. Oaki

    Chemical Communications （Chemical Communications)  54 （ 3 ） 244 - 247 2018.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  13597345

    　View Summary

    Herein, few-layered titanate nanosheets with a large lateral size and surface functionalization were synthesized via the exfoliation of precursor layered composites in an organic medium. The combination of layered compounds, intercalated guests, and dispersion media has the potential for the synthesis of nanosheets with controlled lateral sizes, thicknesses, and surface chemistry through exfoliation.

  • Effects of intercalation rate on layered crystal structures and stimuli-responsive color-change properties of polydiacetylene

    M. Takeuchi, H. Imai, Y. Oaki

    Journal of Materials Chemistry C 5 （ 32 ） 8250 - 8255 2017.07

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2050-7526

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Presentations 【 Display / hide 】

  • 表面修飾ナノシートを用いたエマルジョン分離膜の作製

    坪井良介「他」

    The 102th CSJ Annual Meeting(2022) (Online Meeting) , 

    2022.03
    , 

    Oral presentation (general)

  • 非晶質共役高分子ネットワークのナノ粒子化による高性能な水素発生電極触媒の作製

    濱田和香奈「他」

    The 102th CSJ Annual Meeting(2022) (Online Meeting) , 

    2022.03
    , 

    Oral presentation (general)

  • Amorphas network polymers containing furan derivatives for electrocatalyst of hydrogen evolution reaction

    Wakana Hamada

    The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem 2021) (Online Meeting) , 

    2021.12
    , 

    Oral presentation (general)

  • Prediction models for efficient exploration of high-performance organic cathodes by machine learning on small data

    Kosuke Sakano

    The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem 2021) (Online Meeting) , 

    2021.12
    , 

    Oral presentation (general)

  • Water-repellent surfaces based on exfoliated transition-metal-oxide nanosheets

    Ryota Hikichi

    The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem 2021) (Online Meeting) , 

    2021.12
    , 

    Oral presentation (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 高分子材料の自由体積空間における共役高分子の気相重合と機能開拓

    2022.06
    -
    2025.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 挑戦的研究（萌芽）, Principal investigator

  • 層状ポリジアセチレンの柔軟性の理解に基づく刺激応答性制御とセンサ応用

    2022.04
    -
    2026.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 基盤研究(B), Principal investigator

  • キノン含有共役高分子材料の水圏および非水圏での機能制御とエネルギー関連応用

    2022.04
    -
    2024.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 新学術領域研究（研究領域提案型）, Principal investigator

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Awards 【 Display / hide 】

  • 平成30年度科学技術分野の文部科学大臣表彰　若手科学者賞

    2018.04, 結晶からつくる有機および無機高分子材料に関する研究

  • The Chemical Society of Japan Award For Young Chemists for 2015

    2017.03, The Chemical Society of Japan, Morphology Control and Function Exploration of Crystals and Polymer Materials through Approaches Inspired by Biominerals

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Other 【 Display / hide 】

  • 　View Details

    科学技術振興機構戦略的創造研究推進事業（さきがけ）　研究者（兼任）
    2016年10月～2020年3月

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Courses Taught 【 Display / hide 】

  • SEMINAR IN APPLIED CHEMISTRY

    2024

  • NANO SCALE SCIENCE JOINT SEMINAR

    2024

  • MATERIALS PROCESSING

    2024

  • MATERIAL DESIGN SCIENCE JOINT SEMINAR

    2024

  • LABORATORIES IN SCIENCE AND TECHNOLOGY

    2024

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Social Activities 【 Display / hide 】

  • 「ナノテク最先端」研究紹介と体験教室 アカデミーキャンプ2012第3期・アカデミーキャンプ実行委員会

    2012.08

    　View Summary

    参加者：福島県在住の小中学生約40名

  • 全国高校化学グランプリ2012・2次選考受験者対象研究紹介

    2012.08

    　View Summary

    公益社団法人日本化学会主催
    参加者：中高生約80名

  • 学び体験フェア　マナビゲート2013, 「生き物の結晶にまなぶものづくり」

    2013.08

    　View Summary

    参加者：1400名, 主催：ＮＰＯ法人学びの支援コンソーシアム，於: 東京国際フォーラム，東京

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Memberships in Academic Societies 【 Display / hide 】

  • 公益社団法人日本化学会, 

    2004
    -
    Present

  • 公益社団法人日本セラミックス協会, 

    2004
    -
    Present

  • 公益社団法人高分子学会, 

    2008
    -
    Present
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Committee Experiences 【 Display / hide 】

  • 2017.03
    -
    Present

    委員, 公益社団法人日本化学会　化工誌編集委員会　幹事委員

  • 2013.02
    -
    Present

    委員, 公益社団法人日本化学会　化学フェスタ実行委員会

  • 2010.04
    -
    Present

    委員, 公益社団法人日本化学会　教育・普及部門　化学だいすきクラブ小委員会　幹事委員

  • 2014.03
    -
    2017.02

    委員, 公益社団法人日本化学会　化工誌編集委員会　編集委員

  • 2012.09
    -
    2015.09

    委員, 公益社団法人日本セラミックス協会　行事企画委員会

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