Formation mechanism of nanoporous structures through the crystallization of amorphous oxides
| Project/Area Number |
21760556
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
NAKAMURA Ryusuke Osaka University, 産業科学研究所, 助教 (70396513)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | アモルファス / 酸化物 / ナノポーラス / TEM / 動径分布関数 / HAADF-STEM / 薄膜 |
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| Research Abstract |
A high density of nanovoids between 2 and 13 nm in size were produced during the crystallization process as amorphous Al_2O_3 and WO_3 20～30 % lower in density than their crystalline phases were annealed. By contrast, no formation or growth of nanovoids was observed during the crystallization of amorphous TiO_2 and Cr_2O_3, which have a density 2% lower than its crystalline phase. These results suggest that large difference in density between the amorphous and crystalline oxides can be utilized to produce nanoporous structures.
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Report
(3 results)
Research Products
(9 results)
