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Clarification of mechanism of calcium carbonate polymorphism by control of interface tension through change of hydration structure

Research Project

Project/Area Number 16K21164
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Crystal engineering
Nanostructural chemistry
Research InstitutionKyoto University

Principal Investigator

Araki Yuki  京都大学, 工学研究科, 特定研究員 (50734480)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsバイオミネラリゼーション / 固液界面 / 水和構造 / 炭酸カルシウム / 周波数変調原子間力顕微鏡 / マグネシウム / 多形制御 / カルサイト / アラゴナイト / 周波数変調型原子間力顕微鏡 / 結晶成長 / 表面・界面物性 / 走査プローブ顕微鏡
Outline of Final Research Achievements

We aim to clarify the effect of interface water in the polymorphism of calcium carbonate crystal. The change of hydration structure of the surfaces of calcium carbonate crystal (calcite) in the presence of magnesium ions and organic additives was observed by using frequency modulation atomic force microscopy (FM-AFM) in atomic-scale. Analyzing the 3D distribution of interface water, we found that magnesium ions disarrangement of hydration structure due to their hydrophilicity. Our result suggests that decreasing of energy barrier of dehydration through the disarrangement of hydration structure by hydrophilic additives induce decrease of interfacial energy in the polymorphism of calcium carbonate crystal.

Academic Significance and Societal Importance of the Research Achievements

本研究で明らかとなった、マグネシウムによる結晶表面の水和構造の撹乱は親水的な添加物によって普遍的に生じる効果である可能性が高い。固液界面に形成される水和構造は、固体表面への物質の吸着や拡散に対して物理的なバリアとなり、固体表面における物質輸送を阻害する。この影響は、ぬれ性や摩擦などマクロな物性にも及ぶと考えられているが、これらの物性を変化させる触媒にはマグネシウムや遷移金属を始めとして親水的な物質が用いられている。そのため、このメカニズムにも水和構造の撹乱効果が関与していると考えられ、本研究の成果は液中の触媒メカニズムの解明に向けた研究へ波及することが期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (13 results)

All 2018 2017 2016

All Presentation (13 results) (of which Int'l Joint Research: 9 results,  Invited: 2 results)

  • [Presentation] Particular effect of Mg2+ on hydration structure at calcite surface2018

    • Author(s)
      Y. Araki, K. Kobayashi, H. Yamada
    • Organizer
      Goldschmidt Conference 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Specific effect of Mg2+ on hydration structure of calcite revealed by 3D frequency shift mapping2018

    • Author(s)
      Y. Araki, K. Kobayashi, H. Yamada
    • Organizer
      nc-AFM2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Specific effect of Mg2+ on hydration structure of calcite probed by FM-AFM2018

    • Author(s)
      Y. Araki, K. Kobayashi, H. Yamada
    • Organizer
      ACSIN-14&ICSPM26
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] カルサイトの水和構造に対するマグネシウムイオンの特異的効果2018

    • Author(s)
      荒木優希,小林圭,山田啓文
    • Organizer
      第47回結晶成長国内会議
    • Related Report
      2018 Annual Research Report
  • [Presentation] 3D observation of hydration structure above calcite in molecular-scale by FM-AFM2018

    • Author(s)
      Y. Araki, K. Kobayashi, H. Yamada
    • Organizer
      Water on Material Surfaces 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mg2+存在下におけるカルサイトの3次元水和構造評価2017

    • Author(s)
      荒木優希,小林圭,山田啓文
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      バシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Research-status Report
  • [Presentation] 3D imaging of hydration structures at step edges of calcite2017

    • Author(s)
      Y.Araki, K. Kobayashi, H.Yamada
    • Organizer
      The 19th International Scanning Probe Microscopy Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Polymorphism of CaCO3 crystals via change in hydration structure induced by organic and inorganic additives2017

    • Author(s)
      Y.Araki, K.Tsukamoto, R.Takagi, T.Miyashita, N.Oyabu, K.Kobayashi, H.Yamada
    • Organizer
      Biomin XIV 14th International Symposium on Biomineralization
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] カルサイト分子ステップ近傍の3次元水和構造評価2017

    • Author(s)
      荒木優希,小林圭,山田啓文
    • Organizer
      第46回結晶成長学会国内会議
    • Related Report
      2017 Research-status Report
  • [Presentation] 炭酸カルシウム結晶の水和構造に対する電解質の影響評価2017

    • Author(s)
      荒木優希,小林圭,山田啓文
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Mg2+ effect on 3D water distribution of calcite surface2016

    • Author(s)
      Yuki Araki, Kei Kobayashi, Hirofumi Yamada
    • Organizer
      24th International Colloquium on Scanning Probe Microscopy
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2016-12-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dependence of Hydration Structure above Calcite Surface on Mg2+ Concentration Probed by FM-AFM2016

    • Author(s)
      Yuki Araki, Hiroshi Onishi, Kei Kobayashi, Hirofumi Yamada
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-08-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Mg concentration dependence of calcite hydration structure2016

    • Author(s)
      Yuki Araki, Hiroshi Onishi, Kei Kobayashi, Hirofumi Yamada
    • Organizer
      19th International Conference on Non-contact AFM
    • Place of Presentation
      Nottingham, UK
    • Year and Date
      2016-07-25
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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