Quantitative three-dimensional modeling of zeotile through discrete electron tomography

Discrete electron tomography is a new approach for three-dimensional reconstruction of nanoscale objects. The technique exploits prior knowledge of the object to be reconstructed, which results in an improvement of the quality of the reconstructions. Through the combination of conventional transmiss...

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Veröffentlicht in:Journal of the American Chemical Society Jg. 131; H. 13; S. 4769
Hauptverfasser: Bals, Sara, Batenburg, K Joost, Liang, Duoduo, Lebedev, Oleg, Van Tendeloo, Gustaaf, Aerts, Alexander, Martens, Johan A, Kirschhock, Christine E A
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 08.04.2009
Schlagworte:
Electron Microscope Tomography - methods
Imaging, Three-Dimensional - methods
Microscopy, Electron, Transmission
Models, Molecular
Molecular Conformation
Zeolites - chemical synthesis
Zeolites - chemistry
ISSN:1520-5126, 1520-5126
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Zusammenfassung:Discrete electron tomography is a new approach for three-dimensional reconstruction of nanoscale objects. The technique exploits prior knowledge of the object to be reconstructed, which results in an improvement of the quality of the reconstructions. Through the combination of conventional transmission electron microscopy and discrete electron tomography with a model-based approach, quantitative structure determination becomes possible. In the present work, this approach is used to unravel the building scheme of Zeotile-4, a silica material with two levels of structural order. The layer sequence of slab-shaped building units could be identified. Successive layers were found to be related by a rotation of 120 degrees, resulting in a hexagonal space group. The Zeotile-4 material is a demonstration of the concept of successive structuring of silica at two levels. At the first level, the colloid chemical properties of Silicalite-1 precursors are exploited to create building units with a slablike geometry. At the second level, the slablike units are tiled using a triblock copolymer to serve as a mesoscale structuring agent.
Bibliographie:ObjectType-Article-1
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ISSN:1520-5126
1520-5126
DOI:10.1021/ja8089125