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Novel nanostructures through 1.5-2.5 dimensional expansion

Publicly Offered Research

Project AreaScience of 2.5 Dimensional Materials: Paradigm Shift of Materials Science Toward Future Social Innovation
Project/Area Number 22H05458
Research Category

Grant-in-Aid for Transformative Research Areas (A)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (II)
Research InstitutionNational Institute for Materials Science

Principal Investigator

北浦 良  国立研究開発法人物質・材料研究機構, ナノアーキテクトニクス材料研究センター, グループリーダー (50394903)

Project Period (FY) 2022-06-16 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Fiscal Year 2023: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywords二次元ヘテロ構造 / 二次元半導体 / 機能開拓 / 物性解析 / 二次元超構造 / 先端薄膜成長 / 固体物性 / 混合次元 / 機能化
Outline of Research at the Start

「二次元物質の積層による次元拡張(2+2)」とは異なる着眼点から新奇ナノ構造を設計・合成し、領域内の研究者との共同研究を通して新物質科学の発展に貢献する。一次元構造体の接合によって二次元構造へと次元性を拡張する「1+1→1.5」、それらをさらに積層することによる次元性の拡張「1.5+1.5」が生み出す新奇ナノ構造は、構成要素とは異なる次元性、異なる空間対称性、異なる長周期層間相互作用をもつ。これら孤立した構成要素とは全く異なる電子状態をもつ新奇ナノ構造を独自技術で世界に先駆けて実現し、領域内に幅広く共同研究を展開し新物質科学を拓いていくことを目的とする。

Outline of Annual Research Achievements

本研究では、新たなカテゴリーの2.5次元物質の開拓を目的とし、二次元半導体のヘテロ接合・積層構造の作製と評価および理論的解析を進めた。また、共同研究を通して領域に貢献することを目指し、第一原理計算による電子状態解明、hBNとのヘテロ積層、積層構造の作製法、光物性計測、光起電力測定などについて他班のメンバーと幅広く共同研究を展開した。以下には、得られた結果の幾つかについて記述する。例えばhBNとのヘテロ積層構造を用いた研究では、ゲート変調反射分光によって荷電励起子のリドベルグ状態を明瞭に観測することに成功した。この手法は、微小な光学応答の観測に有効であり、モワレ励起子など2.5次元物質で現れる新たな励起状態の観測に役立つことが期待される。また、同様にhBNとのヘテロ積層を用いた研究において、バレーコヒーレンスを観測し、自由な励起子とゼロ次元に閉じ込められた励起子では、コヒーレンス時間が大きく異なりうることを見出した。第一原理計算による解析では、接合・積層構造を対象にキャリア蓄積を調べたところ、その特異なナノ構造を反映して構造としては二次元であるにも関わらず「ゼロおよび一次元状にキャリア蓄積が起こる」ことが明らかになった。最後に、光起電力測定では二次元半導体を曲げることで鉛直方向に分極が発生し、それに由来してバルク光起電力が鉛直方向に生じることを明らかとした。以上に述べた以外にも様々な成果が得られた。本領域での研究活動を通して新たに構築できた共同研究ネットワークは、今後も維持しさらなる発展の基盤としていきたい。

Research Progress Status

令和5年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和5年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • Research Products

    (24 results)

All 2024 2023 2022

All Journal Article (11 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 11 results,  Open Access: 5 results) Presentation (13 results) (of which Int'l Joint Research: 8 results,  Invited: 13 results)

  • [Journal Article] Photo-thermoelectric effect-driven detection of optical communication light in graphene/hBN heterostructures2024

    • Author(s)
      Iwasaki Takuya、Sato Yodai、Ogo Makoto、Oh Byunghun、Kozawa Daichi、Kitaura Ryo、Watanabe Kenji、Taniguchi Takashi、Moriyama Satoshi、Fujikata Junichi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 63 Issue: 3 Pages: 030903-030903

    • DOI

      10.35848/1347-4065/ad2bd6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gate-modulated reflectance spectroscopy for detecting excitonic states in two-dimensional semiconductors2023

    • Author(s)
      Xue Mengsong、Watanabe Kenji、Taniguchi Takashi、Kitaura Ryo
    • Journal Title

      Applied Physics Letters

      Volume: 123 Issue: 6 Pages: 063101-063101

    • DOI

      10.1063/5.0159245

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Localized Excitons in Zn-Porphyrin Covalently Functionalized MoS<sub>2</sub> and WS<sub>2</sub>2023

    • Author(s)
      Canton-Vitoria Ruben、Hotta Takato、Tanuma Yuri、Sideri Ioanna K.、Tagmatarchis Nikos、Ewels Chris、Kitaura Ryo
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 22 Pages: 10699-10708

    • DOI

      10.1021/acs.jpcc.2c08009

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Assessment of valley coherence in a high-quality monolayer molybdenum diselenide2023

    • Author(s)
      Urano Yuto、Xue Mengsong、Watanabe Kenji、Taniguchi Takashi、Kitaura Ryo
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 6 Pages: 065003-065003

    • DOI

      10.35848/1882-0786/acd985

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis and Characterization of Transition Metal Dichalcogenide Nanoribbons Based on a Controllable O<sub>2</sub> Etching2023

    • Author(s)
      Canton-Vitoria Ruben、Hotta Takato、Xue Mengsong、Zhang Shaochun、Kitaura Ryo
    • Journal Title

      JACS Au

      Volume: 3 Issue: 3 Pages: 775-784

    • DOI

      10.1021/jacsau.2c00536

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of the photovoltaic effect in a van der Waals heterostructure2023

    • Author(s)
      Zhang Shaochun、Maruyama Mina、Okada Susumu、Xue Mengsong、Watanabe Kenji、Taniguchi Takashi、Hashimoto Kazuki、Miyata Yasumitsu、Canton-Vitoria Ruben、Kitaura Ryo
    • Journal Title

      Nanoscale

      Volume: 15 Issue: 12 Pages: 5948-5953

    • DOI

      10.1039/d2nr06616e

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Field-effect transistor antigen/antibody-TMDs sensors for the detection of COVID-19 samples2023

    • Author(s)
      Canton-Vitoria Ruben、Sato Kotaro、Motooka Yashiro、Toyokuni Shinya、Liu Zheng、Kitaura Ryo
    • Journal Title

      Nanoscale

      Volume: 15 Issue: 9 Pages: 4570-4580

    • DOI

      10.1039/d2nr06630k

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An observation of a photovoltaic effect in MoS<sub>2</sub> nanoribbons fabricated with a top-down approach2023

    • Author(s)
      Zhang Shaochun、Xue Mengsong、Zeng Fanyu、Kitaura Ryo
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 3 Pages: 035003-035003

    • DOI

      10.35848/1882-0786/acbf9f

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of a one-dimensional hole channel in MoS2 by structural corrugation2023

    • Author(s)
      Gao Yanlin、Nakajima Haruna、Maruyama Mina、Taniguchi Takashi、Watanabe Kenji、Kitaura Ryo、Okada Susumu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: 1 Pages: 015001-015001

    • DOI

      10.35848/1347-4065/acaae0

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gate-Induced Trans-Dimensionality of Carrier Distribution in Bilayer Lateral Heterosheet of MoS2 and WS2 for Semiconductor Devices with Tunable Functionality2023

    • Author(s)
      Maruyama Mina、Ichinose Nanami、Gao Yanlin、Liu Zheng、Kitaura Ryo、Okada Susumu
    • Journal Title

      ACS Applied Nano Materials

      Volume: 6 Issue: 7 Pages: 5434-5439

    • DOI

      10.1021/acsanm.2c05561

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Trion confinement in monolayer MoSe2 by carbon nanotube local gating2022

    • Author(s)
      Hotta Takato、Nakajima Haruna、Chiashi Shohei、Inoue Taiki、Maruyama Shigeo、Watanabe Kenji、Taniguchi Takashi、Kitaura Ryo
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 1 Pages: 015001-015001

    • DOI

      10.35848/1882-0786/aca642

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 新奇半導体創出に基づくバンドギャップエンジニアリング2023

    • Author(s)
      北浦 良
    • Organizer
      JST SICORP V4 中間ワークショップ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Heterostructures based on two-dimensional semiconductors2023

    • Author(s)
      Kitaura, Ryo
    • Organizer
      NT23
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gate-modulated reflectance spectroscopy for detecting excitonic species in two-dimensional semiconductors2023

    • Author(s)
      KITAURA, Ryo
    • Organizer
      2023 1st Nano carbon Study Group
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 2次元物質の科学 分子・原子を自在に操る技術とナノアーキテクトニクス2023

    • Author(s)
      北浦 良
    • Organizer
      NIMS公開 オープンハウス2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Heterostructures based on Two-dimensional Materials2023

    • Author(s)
      KITAURA, Ryo
    • Organizer
      65th KVS Summer Annual Conference and IFFFM 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 二次元物質・ヘテロ構造の 構築と機能探索2023

    • Author(s)
      北浦 良
    • Organizer
      量子材料薄膜の結晶成長研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Modulated Spectroscopy for Probing Excitonic States of 2D Systems2023

    • Author(s)
      KITAURA, Ryo
    • Organizer
      13th A3 symposium on emerging materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 2D-materials-based Heterostructures2023

    • Author(s)
      KITAURA, Ryo
    • Organizer
      MANA International Symposium 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fabrication and optical properties of 2D-semiconductor-based heterostructures2022

    • Author(s)
      Kitaura Ryo
    • Organizer
      The 12th Symposium on Emerging materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Heterostructures based on two-dimensional semiconductors2022

    • Author(s)
      Kitaura, Ryo
    • Organizer
      SSDM
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] An exploration of lateral/vertical van der Waals heterostructures2022

    • Author(s)
      Kitaura, Ryo
    • Organizer
      OPA-JSAP symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] An investigation of photovoltaic effects in two-dimensional systems2022

    • Author(s)
      Shaochun Zhang and Ryo Kitaura
    • Organizer
      Nanocarbon research meeting
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Ultrathin Lateral Heterostructures Based on Two-Dimensional Semiconductors2022

    • Author(s)
      Kitaura, Ryo
    • Organizer
      241st ECS Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2022-06-20   Modified: 2024-12-25  

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