期刊
CHEMISTRY OF MATERIALS
卷 21, 期 22, 页码 5466-5473出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm902626z
关键词
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资金
- Cornell Fuel Cell Institute via the Cornell Center for Materials Research
- National Science Foundation [DMR-0520404, DMR 0220460, DMR-0212302, DMR-0819885]
- National Institute of Dental and Craniofacial Research [R21DE018335]
- Department of Energy [DEFG-02-97ER62443]
- NSF and NIH-NIGMS [DMR-0225180]
We report the first use of a nonfrustrated block terpolymer for the synthesis of highly ordered oxide nanocomposites containing multiple plies. The morphological behavior of 15 ISO-oxide nanocomposites was investigated spanning a large range of compositions along the f(I) = f(S) isopleth using aluminosilicate and niobia sols. Morphologies were determined by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) measurements. Four morphologies were identified, including core-shell hexagonal, core-shell double gyroid, three-domain lamellae, and core-shell inverse-hexagonal, in order of increasing O + oxide volume fraction. All of the resulting nanocomposites had three- or five-ply morphologies containing domains that were continuous in one, two, or three dimensions. The five-ply core-shell double gyroid phase was only found to be stable when the 0 + oxide domain was a minority. Removal of the polymer enabled simple and direct synthesis of mesoporous oxide materials while retaining the ordered network structure. We believe that advances in the synthesis of multiply nanocomposites will lead to advanced materials and devices containing multiple plies of functional materials.
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