2021 Fiscal Year Final Research Report
Novel properties generated by edge sites of layered oxides and hydroxides
| Project/Area Number |
20K20450
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| Project/Area Number (Other) |
19H05532 (2019)
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| Research Category |
Grant-in-Aid for Challenging Research (Pioneering)
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| Allocation Type | Multi-year Fund (2020)
Single-year Grants (2019) |
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| Review Section |
Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2019-06-28 – 2022-03-31
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| Keywords | 層状物質 / 形態制御 / ナノ材料 / 層端面 |
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| Outline of Final Research Achievements |
Edge surfaces of two-dimensional crystals are expected to have unique properties, but the nature of edge surfaces has not been explored. In this study, some synthetic methods, such as the anisotropic crystal growth of layered metal hydroxides along with the stacking direction and the size-controlled bottom-up preparation of metal hydroxide nanosheets through two-dimensional crystal growth, were developed to control the proportion of the exposed edge surfaces to the whole crystal surfaces. We also successfully detected hydroxy groups probably located on edge surfaces by analyzing rod-like crystals with an unusually high aspect ratio of the thickness to the lateral size higher than 1.
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| Free Research Field |
無機合成化学
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| Academic Significance and Societal Importance of the Research Achievements |
無機層状化合物は古くから幅広い分野で用いられてきた材料群であるが、結晶端となる層端面に由来する情報は平均構造の中に埋もれていた。本研究で開発に成功した結晶外表面に対する層端面の露出割合を制御する様々な形態制御法は、層端面の理解・活用を大きく前進させるものであり、二次元化合物の科学の深化や次世代材料開発に向け、幅広い無機材料を横断する新たな研究領域の開拓につながると期待される。
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