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Manipulation of Photofunctions of Inorganic Nanosheets Induced by Bioluminescence

Research Project

Project/Area Number 19K05407
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 32020:Functional solid state chemistry-related
Research InstitutionNagasaki University

Principal Investigator

KAMADA KAI  長崎大学, 工学研究科, 准教授 (90315284)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords酵素 / ナノシート / 光触媒 / 蛍光 / バイオイメージング / 生体分子 / 半導体 / 発光酵素 / 発光タンパク質
Outline of Research at the Start

発光性生体分子と無機半導体ナノシートを結合し、生体分子から半導体への光エネルギー移動を利用した半導体光機能の発現に取り組む。具体的には無機層状半導体の層間に発光生体分子を挿入することで、両者が交互積層した無機―バイオ複合体を合成する。この複合体内の生体分子が発する微弱な光(バイオルミネセンス)により半導体層を励起し、その光機能(光触媒能、蛍光能)を引き出す。すなわち、従来、半導体の光機能を引き出すために用いられてきた外部光源を発光生体分子で置き換えるという新しい概念を提案する。

Outline of Final Research Achievements

A novel photocatalytic reaction system was proposed in the present study, where semiconductor nanosheets and weak bioluminescence were utilized as photocatalysts and light source, respectively. The bioluminescence originated from biochemical reactions of enzymes of proteins excites the semiconductor nanosheets, then the nanosheets can oxidize and reduce reactants. More concretely, it was demonstrated that noble metal cations were reduced to metal nanoparticles in the presence of the nanosheets exposed to bioluminescence.
In contrast, although bioimaging employing fluorescent semiconductor nanosheets was also attempted. The titanate-based fluorescent nanosheets was successfully fabricated, but the emission strength was insufficient for bioimaging.

Academic Significance and Societal Importance of the Research Achievements

これまでの光触媒では光源として強い光を放つ外部光源や太陽光の利用を想定していた。本研究ではこれらと比較して極めて低い強度の光源である生物発光を効率的に利用して物質変換につなげる技術を生み出した。とりわけ、この光触媒反応では、主にタンパク質や酵素が引き起こす化学反応に伴って放出する光を利用するため、これらの生体分子1つ1つを微小な光源と考えれば、反応溶液全体に光エネルギーが均等に行き渡ることで、反応効率の向上が見込まれる。また、外部からの光照射を要しないため、夜間や光の届かない空間など、時空間の制限にとらわれることなく光触媒反応を起こせるという特長を見出すことができる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] Development of a Complex Material Composed of Enzymes-Inorganic Nanosheets-Magnetic Beads for Coupled Enzyme Reaction and Its Application to Glucose Detection2022

    • Author(s)
      鹿犱美春, 南川朋花, 上田敏久, 鎌田海, 宗伸明
    • Journal Title

      BUNSEKI KAGAKU

      Volume: 71 Issue: 3 Pages: 159-166

    • DOI

      10.2116/bunsekikagaku.71.159

    • ISSN
      0525-1931
    • Year and Date
      2022-03-05
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stabilization of α-ZrP ceramic nanosheets adsorbing quaternary ammonium ions in organic solvents and their application as a stable solid support for lipase catalyzing stereospecific synthetic reactions2022

    • Author(s)
      Akane Yamada, Gen Onodera, Masanari Kimura, Kai Kamada
    • Journal Title

      Journal of Asian Ceramic Societies

      Volume: 10 Issue: 2 Pages: 338-345

    • DOI

      10.1080/21870764.2022.2051125

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of enzyme/titanate nanosheet complex coated with molecularly imprinted polydopamine for colorimetric quercetin assay2022

    • Author(s)
      Miharu Katori, Mizuki Watanabe, Hideaki Tanaka, Seika Yakushiji, Toshihisa Ueda, Kai Kamada, Nobuaki Soh
    • Journal Title

      Analytical Sciences

      Volume: 38 Issue: 5 Pages: 777-785

    • DOI

      10.1007/s44211-022-00094-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Hybrid Materials Composed of Proteins and Inorganic Nanosheets and Their Application to Analytical Chemistry2021

    • Author(s)
      宗伸明、鎌田海
    • Journal Title

      BUNSEKI KAGAKU

      Volume: 70 Issue: 3 Pages: 83-92

    • DOI

      10.2116/bunsekikagaku.70.83

    • NAID

      130008027530

    • ISSN
      0525-1931
    • Year and Date
      2021-03-05
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photo-manipulation of activity of enzymes bound to inorganic nanomaterials2019

    • Author(s)
      Kai Kamada
    • Journal Title

      Journal of Solid State Chemistry

      Volume: 280 Pages: 120996-120996

    • DOI

      10.1016/j.jssc.2019.120996

    • NAID

      120006988375

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] バイオルミネセンスをエネルギー源とする半導体光触媒反応の可能性試験2021

    • Author(s)
      鎌田海, Yue Gaofan, 上田太郎, 兵頭健生, 清水康博
    • Organizer
      日本セラミックス協会九州支部秋季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 生体分子と無機半導体の複合材料の創製と光機能2020

    • Author(s)
      鎌田海
    • Organizer
      CIREn電気化学研究分科会2020年度第1回講演会
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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